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Old 06-30-2011, 10:24 PM   #1
KingRex
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1994 SL2
Default 1997 To 1995 Engine Swap

So, I got a fantastic deal on a 1995 Saturn SL2 in fantastic shape. The car only has 89,000 miles on it, and it's pretty clean all around. Automatic transmission, Traction Control, ABS, the standard SL2 package. The car is in much nicer shape than my 1997 SL2.

The 1995 was run low on oil so it has a little rod knock in the bottom end but I was able to drive it home 50 miles with little complaints from it. I'm gonna pull the bottom of the 1995's engine and see if I can just change the bearings, because the knock is still quite subtile, and isn't constant, so maybe I can save the 1995 engine, but I am not going to hold my breath.

If it comes down too it, I'm just going to take the engine out of my 1997, which is plagued with electrical issues. I'm tired of chasing the electrical bugs, and am just going to tare the engine out and put it in the 1995 body. While yes, the engine does have 195,000 miles on it, I believe sometime in it's life it was rebuilt professionally, as it purrs like a kitten, has tons of power, doesn't burn a drop of oil, and is clean as can be. I know it was very well maintained before I got it as well, as I have service records as far back as 1998. It was maintained by Saturn Of Greenfield near Milwaukee since it was new. So why bother looking for a crap junk yard engine I know squat about, when I know my engines entire history.

I know various things from the 1995 and 1997 are different; I know the fuel injectors, knock sensor and some other junk is different, but only needs to be swapped over between the two engines. My big question is, has anyone figured out how to make a newer model engine work with the old OBD1 temp gauge sensor? I know 1996+ all read off the ECTS, and that tells the gauge, but the 1995's and below have a sensor just for the gauge. Has anyone figured out a way to make it work?

I've gone over the swap guide a few times, is there anything else I am missing that I must change over on the 1997 engine to make it work well in the 1995?

Also, if I do the swap. I will be parting the 1997 out, so parts galore will be available!
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Old 06-30-2011, 11:14 PM   #2
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1996 SW2
Default Re: 1997 To 1995 Engine Swap

Drill a hole in the gooseneck for the upper radiator hose; put the gauge sender in it. I believe Low Saturn has a photo of such a set-up in his photo gallery.
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Old 06-30-2011, 11:20 PM   #3
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2001 SC2
Default Re: 1997 To 1995 Engine Swap

Drill a hole and tap it like everyone else has that's swapped a '96+ motor into a '93-'95.
Injectors change, easier IMO to swap the whole rail from one to the other instead of just the injectors.
Canister purge solenoid changes '95-'96 so keep the '95.
I think the oil pressure switch changes and I know the knock sensor change's.
Pretty much swap all the sensors from the broke engine to the working one.

Great tip: While both engines are out, rob 2 of the intake manifold studs (keep track of the nuts) and stick 'em in the starter bolt holes. Use the nuts to hold the starter in.

If the '97 is a 5spd you'll have to swap the flywheel/clutch for the flexplate. Keep the bolts separate and use the shorter flexplate bolts on the flexplate.
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