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What we need are wiring diagrams of both and things like that that we need to plug into the motor.

Tiny
FATTAGE
  • MEMBER
  • 1998 SATURN SL2
  • 180,000 MILES
We're replacing the motor and trans of the 98 sl2 with one from 96 sl1 and need help with wiring and stuff like that? We already have the motor mounted.
Saturday, October 1st, 2011 AT 9:05 PM

11 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Are the motors the same size, that is, both single overheaed or both dual overhead?

Roy
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Saturday, October 1st, 2011 AT 9:08 PM
Tiny
FATTAGE
  • MEMBER
  • 7 POSTS
The original is a dual overhead cam being replaces with a single.
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Saturday, October 1st, 2011 AT 9:11 PM
Tiny
FATTAGE
  • MEMBER
  • 7 POSTS
We also replaced both the engine and trans just so you know.
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Saturday, October 1st, 2011 AT 9:14 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I would stop right there. Oyu need complete harness and all sensors including computer from the doner car. Harness, sensors pcm are different for each car.

Roy
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Saturday, October 1st, 2011 AT 9:51 PM
Tiny
FATTAGE
  • MEMBER
  • 7 POSTS
Ok i'll make sure we do that.
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Saturday, October 1st, 2011 AT 10:11 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Just to add to this one is the car a stick or automatic transmission?Also does the car have air injection?Do you have smog checks where you live?
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Sunday, October 2nd, 2011 AT 3:22 AM
Tiny
FATTAGE
  • MEMBER
  • 7 POSTS
Both are manual transmission. We never heard of air injection so we don't know if it does and as far as I know we don't have smog checks.
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Sunday, October 2nd, 2011 AT 6:24 PM
Tiny
FATTAGE
  • MEMBER
  • 7 POSTS
We grabbed the computer from the donor car not sure about all the sensors and we think we got the harness we just need to find it.
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Sunday, October 2nd, 2011 AT 6:35 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Was there a vacuum solendo and valve with larger hose coming off it on top of your a/c compressor?Also what your trying to do is crazy I think because its a down grade on your engine plus there is a lot of factors involed here your going with a older engine its a single cam rather then a dual cam.I have never swaped a single for a dual cam or vice verus nor would I try.I have taken a twin cam 1996 SL2 and put a 1998 SL2 engine in it both twin cam engines and the only thing I had to swap was a couple of engine sensors. Iam checking on compatiablity issue from the twin cam to the single cam. The variables will be the engine harness and the underhood fuse box. Iam not sure if those are the same as the single cam one.
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Sunday, October 2nd, 2011 AT 8:16 PM
Tiny
FATTAGE
  • MEMBER
  • 7 POSTS
Well the 98 dual cam for the Saturn has been know to break and that's what happened. And we have another car with the 96 single cam with 250,000 miles on it and it's still going fine with 40 MPG so personally I think the single cam is better especially since the one were putting in only has 60,000 miles on it. But anyway I don't know about the a/c compressor my dad is the one working on it and I don't know a lot about cars he just asked me to find out certain things and he's not going to be around for the next week. Thanks for you help though. Just want to know the things that we need to use from the donor car and from the original body in order for this to work and hopefully.
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Tuesday, October 4th, 2011 AT 11:24 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
What has been known to break on the 1998 dual cam engine?Off the top of my head I cant think of what your talking about breaking on the 1998 dual cam engines. Just a fun fact about the single cam saturn S model engines there known for the number 3 or 4 cam journal cracking on thehead causing the oil to flood into the coolant. You have to replace everything when that happens worse part is flushing all the oil out of the coolant.I have had to make tons of these repairs on these engines we nick them a milk shake when it happens. Can happen anytime without any warning. So other then that your right they are great engine iam not be sarcastic ethier I like there design.I was asking about if your car had that air injection because were going to have to change your engine harness along with the computer. So I was trying to figure out if were going to change your underhood fuse box.
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Tuesday, October 4th, 2011 AT 11:54 PM

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