Swap Guide

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Engine

The S-series used the following engines:

  • LL0 (DOHC MPFI) (124bhp)
  • LK0 (SOHC TBI) (75bhp)
  • L24 (SOHC MPFI) (100bhp)

Fuel System

Saturn made a few changes to the fuel system over the years.

General

1991 - 1997 Have the wonderful fuel return line.
1998 - 2002 Have the returnless fuel system.
1999(?) - 2002 have a plastic test port.
91-94 fuel pressure regulators are non-adjustable.
95-97 fuel pressure regulators are adjustable.
91-94 aluminum fuel rails will not fit 95-97 intake manifolds due to the bolt pattern and fuel lines being plastic.

Any aftermarket adjustable FPR for an 1992 through 1996 LT-1 Corvette will bolt right up to a Saturn fuel rail

Note:

Return type fuel rail used on 2003-04 Cavalier and Sunfires will convert "returnlees" type fuel rail on 2003-04 ION. You will need to convert/replace tank unit AND route a return line back to the fuel tank as well (or at least as far as the T-fitting at the fuel filter) The 2 line JBody filter can then replace the 3 line version in this mod.

Fuel Pumps

91-96
Type G.P.H. L.P.H. Max P.S.I.
Gerotor 30-45 114-170 65-75
97
Type G.P.H. L.P.H. Max P.S.I.
Turbine 30-40 114-151 70-85
98-99
Type G.P.H. L.P.H. Max P.S.I.
Turbine 35-45 132-170 70-90
00-02
Type G.P.H. L.P.H. Max P.S.I.
? ? ? ?
Note:

'97 Fuel pumps are known somewhat for having isses. Often they are just slow to prime, and will work fine if you turn the key to "run" and wait to hear the pump kick in before turning to "start".

Injectors

Design of a GM style injector
Impedance
91-95 peak and hold or also known as low impedance
96-02 saturated or also known as high impedance

To determine injector types, set multi-meter to measure resistance.

  • 2-4(ohms) low impedance
  • 4-10(ohms) weird injectors. pretty much only found on old porsches.
  • 10-14(ohms) high impedance
  • DOHC injectors flow 19 lbs/min
  • SOHC (MPFI) injectors flow 15 lbs/min
Note:

The shape/style of the injectors changed sometime in the 3rd gen models. They switched to a long, thin injector with a different, non-Bosch harness. The fuel rail is positioned higher to compensate for the extra length. If you need after market injectors you'll have to cut and splice in standard Bosch style connectors to the factory wiring and modify the fuel rail to sit lower.

When performing a SOHC to DOHC swap, you need to use the appropriate DOHC injectors for that year vehicle as the SOHC injectors will not run correctly on the DOHC engine.

List of cars with injectors that could be used for boost applications. Make sure that they fit a Saturn before purchasing. HERE

Fuel Rails

  • 91-94 aluminum fuel rails will not fit
  • 95-97 plastic fuel rails with adjustable fuel pressure regulator.
Note:
The plastic rail and aluminum rails have different bolt patterns.

Intake

Intake manifolds

DOHC Intake manifold
Intake Manafolds
91-94 interchange.
95-98 interchange.
99-2k interchange
  • 91-94 aluminum fuel rails will not fit 95-97 intake manifolds due to the bolt pattern and fuel lines being plastic.
  • 95-97 plastic fuel rails w/adjustable fuel pressure regulators will not fit the 91-94 intake manifolds due to the bolt pattern and fuel lines being metal.
  • 91-99 ports are identical.
  • 91-94 fuel rail mounts are set for the aluminum fuel rail.
  • 95-99 are set for the plastic rails.
  • 95-99 manifolds are identical.
  • 1st and 2nd gen manifolds will fit 00-02 heads.
  • 00-02 manifolds will NOT fit 91-98 heads.
  • 00-02 manifolds will fit 99 head if you drill out the EGR passage on the head to fit the EGR pipe.
Note:

The ports on the 93-94 are much cleaner than 91-92, though the 92 seemed to have a wider opening on the mouth of the intake ports. The 95 mics out close to the 93-94, though it is reshaped with a shallower curve leading down to the valve surface. The combustion chambers up to 94 are all identical.

Throttle Bodies

Ported/Polished TB from SDA
Throttlebodies
91-early 95 interchange.
late 95-98 interchange.
99-2k interchange.
  • early 95 TBs are the same as 91-94. Late 95 through 98 are the same though.
  • All TB's are horizontal, except for 2000-2002 DOHC. Those have the vertical throttle bodies on the plastic intake manifolds.

MAP/Pressure sensors

There are several varieties of pressure sensors from GM: Map sensors in 3 varieties (1 bar, 2 bar, 3 bar), and a barometric pressure sensor. 1 Bar sensors are good for NA engines, they measure from 0 (30inHg vacuum) to approximately atmospheric pressure. A 2 Bar sensor is good for 15 PSI of boost, and a 3 Bar unit is good for 30 psi of boost. They all share a common pinout, although the connector keying may be different:

Pin A -- Ground Pin B -- Sensor output Pin C -- +5 volts

Version Part numbers Description

1 Bar GM part # 2503679 standard part # AS-5 Pretty much any normally aspirated TBI GM car, plus plenty of others

2 Bar GM part # 16009886 ~$49 (http://www.gmpartsdirect.com) Wells part # SU-129 standard part # AS-4 91-93 GMC Syclone & Typhoon 4.3 turbo 87-90 Pontiac Sunbird Turbo 2.0 84-86 Sunbird (actually any J-car) turbo 1.8

3 Bar GM part # 16040749

When swapping heads from tbi SOHC to DOHC the engine side of the wiring harness needs to be swapped to the same year harness as the PCM/head. The SOHC PCM needs to be changed to the DOHC PCM of the same year grouping as the head (no matter what). If you have an auto, you must swap to the appropriate year DOHC tranny also.

If going from mpfi SOHC to DOHC, the harness doesn't need to be change.

96 used OBD-II style closed loop operation. If you want to boost and plan on having the stock computer be a part of things, pre-96 is better. You can run rich at boost/part throttle. 96 and later you can't, 99+ is even more sensitive.

When doing my swap from 95 SOHC to 96 DOHC I used the same wiring harness, but the 95 DOHC PCM I bought would not connect due to the connectors so I cut the little guide tabs off with some tile nippers and slid the connector in the PCM it snapped in and no service engine. The only problem was the 95 head has 2 temp sensors and the 96 only has one so I left the gauge sensor out.

Exhaust

Exhaust manifold

Cleaned and coated 1st gen header
Year Notes
1991-1998 DOHC - 5 bolt.
1999-2002 DOHC - 9 bolt.
Note:
  • 91-92 OEM header is interchangeable for 93-98 DOHC Saturn engines.
  • All SOHC are 8 bolt.

Oxygen Sensors

Year Size Notes
1991-1993 14X1.25mm o2 Sensors/Bungs inter swappable between these years but not inter swappable w/ newer ones
1994-2002 18X1.5mm o2 Sensors/Bungs inter swappable between these years but not inter swappable with older ones
  • Upstream
    • 1991-1993
    • 1994-2002
  • Downstream
    • 1996-1999
    • 2000-2002


Note:
  • 1991-1992 DOHC OEM tubular header/manifold O2 bungs can be successfully drilled and tapped to accommodate later model o2 sensors
  • 1994-2002 sensors as well as after market universal units and most WBO2 sensors.
  • 1991-1995 (OBD I) does not use a downstream o2 sensor

EGR Valves

Year Type
1991-1994 Vacuum
1995-1999 Electric
2000-2002 Electric
Note:

Late model 1999's that use the narrow head with the 9 bolt exhaust manifold would use the 2000-2002 style EGR

Top End

Camshaft Specifications

Intake Camshaft out of a DOHC
  • Int. Centerline 107.25*
  • Exh. Centerline 107.5*
@.050 specs
Intake Camshaft
Opens Closes Duration
-7.5 BTDC 27.5 ABDC 200*
Exhaust Camshaft
Opens Closes Duration
24.5 BBDC -12 ATDC 192.5*
@.006 specs
Intake Camshaft
Opens Closes Duration
7 BTDC 51 ABDC 238*
Exhaust Camshaft
Opens Closes Duration
39 BBDC 7 ATDC 226*
Note:

Not indicative of all years (1991-1998) but close....

Cylinder Heads

Newly rebuilt DOHC head
Compatibility (DOHC)
Year Notes
91-94
  • First generation heads
  • Vacuum type EGR valve.
  • 91 is a bit odd, in that it has slightly different cam-cover bolt holes.
  • 92-94 Will interchange. (compatible with any year block.)
  • Will require California adapter for linear EGR valves (Saturn part# 21006753)
95-98
  • Second generation heads.
  • Linear EGR valve, otherwise compatible with 91-94 heads.
  • Compatible with any year block.
  • 95 Has two ECT sensor ports. (96-98 heads can be drilled and tapped for a 2nd ECT sensor, 95 heads can be plugged with an extra ECT sensor)
99+
  • Third generation heads
  • Linear EGR valve
  • These are NOT compatible with older heads.
  • Completely redesigned.
  • Compatible with any year block.
  • Have the roller-rocker design with the small ports.
Note:

You can use a 95 DOHC head all the way up to '98 all you have to do is buy one extra temp sender and screw it in the "spare" hole. Alternately, you can install the sender from an Autometer electric coolant temp gauge-it's a direct fit.

Valves

Valve types
91-93 Flat faced. Compatible with cylinder heads up to 98.
94-98 Dished. Compatible cylinder heads up to 98.

Now what difference does it make?

  • The 91-93 can be used to raise the compression slightly on the 94+ model years.
  • The 94+ valves can be used on 91-93 years to lower compression slightly.
Valve Specifications
Valve Head Diameter Length Stem Diameter Face Angle
Intake Valve DOHC 99-02 1.272 3.996 0.2738 45
Exhaust Valve DOHC 99-02 1.081 3.967 0.2732 45
Intake Valve DOHC 91-98 1.272 3.996 0.2738 45
Exhaust Valve DOHC 91-98 1.081 3.967 0.2732 45
Intake Valve SOHC 91-02 1.575 5.469 0.2737 45
Exhaust Valve SOHC 91-02 1.339 5.475 0.273 45

Cam Covers

Painted DOHC cam cover
Cam covers
91-98 interchangeable.
  • 91-95(mid year) are aluminum
  • 95(mid year)-98 are black composite.
  • 96-98 have an extra bolt hole on the rear that won't be used on 91-95 heads, but they still work fine.
99-02 interchangeable.
Note:

The earlier cam covers seal better, as they have more bolts holding them down.

Composite cam covers seal fine if you run a small bead of Right Stuff on the surface.

Bottom End

Blocks

S-Series Block
  • 91-02 blocks are compatible with all years
  • 1991 - 1993 (midway through '93) blocks contain an oil feed restrictor (looks like a freeze plug with a hole in it) present in the right front oil galley beneath the deck. This should be removed to prevent oil starvation to the head, as the newer headgaskets function as the restrictor.
  • 91-99 blocks interchange externally. Now internally it's a different ball game. The 91-92 had a crank all on its own that will not function correctly in the 93-99 years due to the positioning of the crank position sensor reluctor ring notches. 93-99 cranks are interchangeable
  • 92 to 02 blocks are totally interchangeable. The 00 and up blocks are stronger and all the accessories from previous years fit. Also, The internals from previous years will fit in the 00 and up blocks.
  • There were 2 dipstick tubes used, not entirely sure when they changed, but 91-92 I know for sure had a dipstick tube that positioned itself away from the block, and I know that my 99+2000 have a dipstick tube that hugs the block. The actual dipsticks are the same length so you can use either tube to move the dipstick out of the way of the turbo, or supercharger.
  • There are some minor differences between the older blocks and the 99+
    • The casting are different for the knock sensor on the 99+.
    • The older block positions the sensor midway between the middle oil gallery plug and the oil pressure sensor.
    • The 99+ blocks position the sensor at a different angle, almost directly above the middle gallery plug.
    • The sensor mounting bolt off a 99+ will not fit the threads on a older block.
  • The good news is the 99+ block still retains the mounting point for the old style knock sensor. If you end up installing an older block in a 99+ car you'll need a threaded stud and a nut to install the 3rd gen knock sensor. Also the casting is different for the belt tensioner. The 99+ has a large circular cut out behind the tensioner while the older style only has a cut out approximately an inch in diameter. The 99+ tensioner will not fit on the older blocks.
  • Bolts for holding Block to Engine Stand: M12 X 1.75 x 120mm


Here's all the parts you need to put a Tie Plate(girdle) on a Pre 2000 Block.
Qty Part Saturn P/N
1 Tie Plate 21008490
10 Main Bolts 21008491
10 Tie Plate Inserts 21008492
10 Washers 21015091
10 Nuts 11516879
1 Pick up tube 21008572
1 Oil Pan 21015428
Note:

Also the Tie Plate inserts require a special socket SPX#J44057

Keep in mind if you are installing a Tie Plate on a SOHC block, you'll need a DOHC oil pick-up tube. The SOHC tube's mounting arms straddle the crankshaft while the DOHC tube attaches on one side of the block and to the bottom of the Tie Plate.

Connecting Rods

Saturn Connecting Rod
Year Notes
1991 - 1998 Rods are the same.
1999 - 2002 Rods are the same.
Note:

1999-02 rods are longer than the 91-98 rods, and have to be used with the 99-02 pistons which have the wrist pin moved up.

The 99-02 rods are 5.863" long vs 5.712" for the 91-98 rods.

Crankshafts

Saturn Crankshafts
Compatibility
Year Notes
91-92 Only works with a 91-92 PCM. Avoid at all costs. If a 91-92 crank is used with a 93-95 PCM timing will be retarded, ALOT!
93-98 Are essentially identical. compatible with any year block.
99-02 Were redesigned with separate counter-weights; heavier but supposedly smoother running. Compatible with any year block.

Pistons

Stock Saturn pistons
  • 91-93 Pistons + 94-99 valves equal lower compression.
  • 94-99 Pistons with 91-93 vales equal higher compression.
  • 99-02 Pistons are interchangeable between SOHC and DOHC engines.
Note:

Now with these compression changes they are slight not drastic. It is about a 2-2.5 point change in compression. So do not expect huge gains.

The 91-93 model years came with the lower compression piston than the later years. The way they maintained the 9:5:1 compression was using the flat faced valves. The 91-93 pistons also came with thicker ring lands which is a plus. Now the 94+ years came with a higher compression piston but it also came with thinner ring lands which is not good. The way they maintained the 9:5:1 compression was by using the dished valves to lower the compression down to its 9:5:1 state.

91-94 Pistons; Slight dish, thickest dome of all years. (Yields 9.5:1 compression with 91-94 flatfaced valves) Compatible with 91-98 rods.

Oil Pans

Oil Pan on a DOHC

91-98 oil pans have a clearance problem when installing the windage tray from a 2000+up into your engine so get the oil pan along with the windage tray. The last 2 nuts hold the oil pan up about 1/4" off of the rail

00+ oil pans can be used on earlier engines but The earlier oil pans cannot be used on 00+ engines.

Other

Starters

  • Starters are not auto or manual transmission specific.
  • The "change" in starters was the little bracket in the "first design" starter that mounted to the intermediate shaft bearing.
  • Also for 2000, they flipped the orientation of the battery terminal and the ignition terminal.
Note:

They all fit all years for the 1.9.

Alternators

  • 1991-1994
  • 1995-1997
  • 1998-2002
  • Alternators came in 85 amp, 96 amp and 108 amp variations in stock form

Ignition Control Module

Compatibility
Year Notes
91-92 OBD I
93-95 OBD I
96-02 OBD II
Note:

While 91-92 and 93-95 are both OBD I, they are not interchangeable due to a different CPS and timing mark the 91-92 crank and pcm use.

ECU/Harness

Part of a Saturn Harness
  • 1991-1999 = Manufactured by Delco
  • 2000-2002 = Manufactured by Motorolla
  • 1991-1995 = OBD1
  • 1996-2002 = OBD2
  • 91-92 PCMs are grouped together. The wiring harness for them is slightly different (two wire type oil presssure unit). If using a 93+ block the oil pressure unit must be changed in order for the harness to hook-up.
  • 93-94 PCMs are grouped together.
  • 95 PCMs are year specific.
  • 00-02 uses both a PCM and BCM, and PCMs from these years do not swap with other years.

Radiators

Saturn Radiator
Compatibility
Year Notes
91-93 all the same
94+ all the same
Note:
  • Automatic versions have ports for the transmission fluid lines. An automatic radiator will work on a manual, but obviously not vice-versa.
  • If you purchase an aftermarket radiator, it will almost certainly have the automatic transmission cooler ports. They simply are not used on a manual transmission car.
  • All S-Series radiators are prone to cracking vertically on the drivers side just under the hose connection.
  • Bad or failing motor mounts may help contribute significantly to cracking.
  • Stronger after market radiators can be purchased for an up charge.

Belt tensioner

The belt tensioner from a 2000 will not fit 91-94, I'm not sure about the 95-98 blocks though. The tensioner is too deep for the hole it sits in, 99+up have a bigger hole in them to accommodate the new tensioner. You can use the old style tensioner in the new blocks.

What belt bypasses the P/C and A/C? Saturn Part #21007093

for anyone who would like to do a non P/S non A/C change over for

the pulley is grooved from a SOHC motor from saturn part# 21007458 $33.28

the belt that i used is from gates but you can use this number to get the correct length from any other A/M company part# K050551 $24.37

to remove just the A/C used the original smooth pulley and this belt part# K050660 $30.78

All belts are 5 rib.

WITHOUT A/C WITHOUT PS - 55.0 inches

WITH A/C WITHOUT P/S - 63.5 inches

WITHOUT A/C WITH P/S - 64.5 inches

WITH A/C WITH P/S - 75.5 inches

The Autozone part numbers are just the length and then K5 for 5 rib....so the factory belt for an Sx2 is goign to be 755K5.

Aftermarket

Fel-Pro Gaskets & Seals

1991-1998

  • Head Gasket: 9968 PT
  • Intake Gasket: MS 95632
  • Exhaust Gasket: MS 95630
  • Throttle Body Gasket: 60998
  • 91-94 Vacuum EGR Valve Gasket: 70978
  • (94 CA)95-98 Linear EGR Valve Gasket: 70789
  • Valve Stem Seals: SS 72867
  • Front Crank Seal: TCS 45958
  • Rear Main Seal: BS 40615
  • Water Neck Seal: 35087
  • Water Pump Seal: 35090

Spring Rates

  • OEM Springs: 126 lb/in front, 129 lb/in rear
  • Dropzones 450 lb/in front, 350 lb/in rear
  • H&R Race Springs: 310lb/in front, 250lb/in rear
  • H&R Sport Springs: 205 lb/in front, 195 lb/in rear
  • Eibach Pro Kit: 149 lb/in front, 91-159 lb/in rear
  • Progress Group: 200 lb/in front, 170 lb/in rear
  • Sprint 2" Springs: 200 lb/in front, 140 lb/in rear
  • Sprint 2.5" Springs: 200 lb/in front, 140 lb/in rear
  • KYB GR-2 front: 30% stiffer than stock
  • KYB GR-2 rear: same as stock

ARP studs from Jegs or Summit

Main Studs: Part #165-5402 Head Studs: Part #165-4202

Motor Mounts

Prothane inserts. They're only $25.99 from Summit. And that will do both dogbones. Part # PTP-7-510. Caution: Engine Vibration may significantly increase over stock. SDA sells a set of dogbones that are also very good. Stay away from the Twistec dogbones. The metal ends are paper thin, and numerous people have reported them broken.

Transmission

Transmissions

Saturn Transmission

All manual transmissions are interchangeable.

  • Issues may arise with the coil pack bolting position.
  • The earlier models had the coil pack wire harness on top (above the coil packs, w/two plugs, OBD1), while the 96+ had the harness on the bottom (below the coil packs, w/one plug, OBD2)
  • MP2 is the transmission from the SOHC (It has longer gears, less acceleration)
  • MP3 is the transmission from the DOHC (It has shorter gears, improved acceleration)
  • MP6 Automatic from the SOHC (It has longer gears, less acceleration)
  • MP7 Automatic from the DOHC (It has shorter gears, improved acceleration)
  • Differentials exchange between the two manual transmissions, and between the two automatic transmissions, but a manual differential will not work in an automatic trans, nor will an automatic differential work in a manual trans.
  • 1991 Saturn s-series lack upper motor mounts, (TAM), and consequently use a strut-like mount which attaches to the front of the transaxle. Originally equipped 1991 models may use only 1991- mid 1993 transaxles with provisions for the strut mount cast in to them.
  • All manual transmissions (mp2, mp3) use Dexron III fluid and use 2.5 quarts from empty
  • All automatic transmissions (mp6, mp7) use Dexron III fluid and use 5 quarts from empty
Note:

Automatic to manual swap

Any S-Series that is currently an automatic can receive a manual transmission from any other year or model S-Series.

Axles/CV

  • The inner axle joint splines are the same from 91-02.
    • They will all fit into your transmission or onto your intermediate shaft regardless of trans type or brake equipment
  • The axle shaft itself is 23mm thick for 91-93. It is 24mm thick for 94-02.
    • This goes for ALL the axles. ABS made no difference here.
  • The outer CV joint is where the most debate seems to happen.
    • 91-93 has a smaller spline diameter requiring the 91-93 wheel hub when using these.
    • The 94-02 have a larger spline diameter, requiring the 94-02 hub.
  • Axles are not transmission specific. They are the same whether auto or manual transmission.
Note:

ABS/NON-ABS

The ABS axle has a reluctor ring made into the outer CV housing. That's it. No other difference. In fact, if you have to go to Saturn to replace an axle, you will get an ABS reluctor ring for no extra charge, even if you don't need it. ALL replacement axle assemblies from the factory now have provisions for ABS to reduce production costs.

Clutch

Pressure Plate and Clutch on a DOHC
  • 1991 - 1999 Have the original clutch design.
  • 2000 - 2002 Have the self-adjusting hydraulic POS.
  • 1991 - 2002 Have the same flywheel and throw-out bearing.


These are the parts needed for an automatic to manual transmission conversion on 91-94 S-series. The Saturn part numbers are used for reference.

  • 92-97 MP3 Manual Performance Transmission 21120501
  • Flywheel 21003101
  • Clutch 21120453
  • Pressure plate 21120455
  • Throw-out bearing 21120294
  • Clutch hydraulic assembly (slave cylinder) 21120415
  • Clutch pedal assembly 21012138
  • Clutch pedal pivot rod N/A
  • Shift lever cable assembly 21120125
  • Shifter control assembly 21120497
  • Shift lever/selector lever cable guide 21001395
  • Leather shift knob 21120157
  • Shifter boot 21041528
  • Shift lever cable retainer (2) 21001399
  • Control lever boot retainer (2) 21001249
  • Powertrain Control Module Depends on year
  • Clutch pedal rod retainer 03817880
  • Powertrain mount assembly 21012951
  • Clutch actuator cylinder bracket nut (2) 21006315

Install instructions: http://www.differentracing.com/tech_articles/tranny_swap.html

Shifters

Saturn Shift Assembly

91-94 Shift boots clip into the console from above, have rectangular tapered bases and will not work in 95-2002 vehicles. 95-2002 boots attach to the shifter, there are molded in mount bosses on the shifter and the boot pops into place

Note:

ALL REPLACEMENT SHIFTERS FROM SATURN ARE OF THE 2ND (95-2002) DESIGN AND WILL NOT AFFECT SHIFT BOOT PLACEMENT ON 91-94 VEHICLES

Shifter Cables

All shifter cables interchange, there is only one part number available as replacements for 91-2002.

Note:

The replacement components have a square rubber grommet held in place by a metal retainer and 2 10mm nuts. The factory installed cables have a push in style pass through grommet. If you come across a vehicle that has the cables held in place with the metal bracket and nuts, it simply means they were replaced, not that they are "different" than the ones already on your car.

Note:

Aftermarket shifter cables are known for troubles with flexing, even when very new. OEM cables are recommended, even if they are used instead of new.

Suspension/Brakes

Brakes

  • The rear disc brakes from any s-series will replace any s-series that has rear drums

Disk Brake Conversion

For some reason Saturn decided to change the E-brake cables six different times. The models listed below each have their own style E-brake cable. There are two different lengths (short wheelbase, and long).

Also, in '95 Saturn decided to change the connector at the E-brake cable. This continued till midway through '97, then they went BACK to the original style.

91-94 SC/SC1/SC2

91-94 sedans and wagons and all 97-02 cars (97 with VIN#s VZ334256 (sdn) VZ334335 (wgn) and VZ334269 (cpe) & higher

95-96 SC1/SC2

95-96 sdns, wgns, all 97 models with VIN #'s VZ344255 (sedans) VZ344334 (wagons) and VZ334268 (coupes) and prior

Struts

  • All S-series, 1991-2002, All Models, used the same struts and mounts
    • Any S-series can trade struts with any other s-series

Springs

  • All S-series, 1991-2002, All Models, used the same OEM springs
    • Any S-series can trade springs with any other s-series
Note:

This also applies with aftermarket lowering springs and coil-over set ups

Interior

Sunroof tracks

Head liner slide track lengths may vary, cut if too long.

Year Notes
1991-1995 1st gen body, interchangeable
1996-2002 2nd gen body, interchangeable

Instrument cluster

Year Notes
1991-1992 1st gen interior, included oil pressure gauge. Can't be used with the 93+ wiring harness unless the wires are moved to the proper places in the connector face (some of the wires are in different places).
1993-1994 1st gen interior. Same as 91-92 but without oil pressure gauge.
1995-1997 2nd gen interior, with manual odometer.
1998-1999 2nd gen interior, with digital odometer. Odometer mileage stored in cluster. White face gauges used on White Hot and Red Hot models (98 & 99).
2000-2002 3rd gen interior. Odometer mileage stored in BCM, not the cluster. Cluster swappable with all L-Series clusters, and most Vue, Chevy Equinox, and Pontiac Torrent clusters with some minor issues with the dummy lights.

97 and 99 gauge clusters are interchangeable regardless of the digital/analog odometer difference. all i had to do was replace a bulb from behind the odo with one off the original cluster. so from this i think all 2nd gen clusters swap...

Exterior

Headlights

  • 3rd gen SC headlights will fit on a 2nd gen SC.
    • All you need are the headlights and the headlight brackets.
    • Hood would complete the full conversion, but is not necessary.
  • 3rd gen SL headlights will fit on a 2nd gen SL.
    • All you will need are the headlights and the headlight brackets.

Wheels

All OEM alloy wheels interchange.

Note:
  • The 94-95 style 12-slot sawtooth wheels are the lightest at about 14lbs
  • The first generation teardrops are the heaviest at 19.5lbs.
  • All Saturn alloy wheels use a 15X6" 4X100 bolt pattern with a 50mm offset.