: Differences between 94 and 98 N*



AaronZ34
01-19-07, 04:22 PM
Hi there, I'm new.

I will be buying a 94 STS tomorrow hopefully, and a 98 STS the next week. The 94 has a blown head gasket and lower seal leak, and the 98 rear-ended a big truck, then got rear-ended by a big truck. But it has a good motor/tranny.

My question is, are the 94s and 98 N*'s significantly different in any way? What about the tranny? They are both STS, thus should be the 300hp models if I've read correctly.

Thanks a lot!

AaronZ34
01-19-07, 04:24 PM
Just replying to subscribe because I forgot to check the box..

CadillacSTS42005
01-19-07, 04:43 PM
heres a compatability list

93-94
95-99 (so long as you swap the intake on the 95, it used the same intake as the 93-94)
00-05

no a 98 wont work

AaronZ34
01-19-07, 04:46 PM
Thanks for the reply.

Not to be a dick, but I don't need people telling me it won't work, I need them telling me why they don't think it will work, and then I'll make my own judgement.

What are the differences exactly?

CadillacSTS42005
01-19-07, 04:55 PM
lol
94 obd1
98 obd2
completely different sensors, sensor holes plugs mounts wiring etc etc etc
shall i continue?
its 2 different blocks with the same name
its kinda like asking if an lt1 and an ls1 are the same and a direct swap

AaronZ34
01-19-07, 05:02 PM
lol
94 obd1
98 obd2
completely different sensors, sensor holes plugs mounts wiring etc etc etc
shall i continue?
its 2 different blocks with the same name
its kinda like asking if an lt1 and an ls1 are the same and a direct swap

That's what I wanted to know.

Now what's to stop me from running the 98 engine on OBDI? Just use the 94 OBDI sensors and wiring. It's very common on the 3.4l DOHC I'm familiar with.

CadillacSTS42005
01-19-07, 06:09 PM
they use completely different plug ins
people here have asked this before and it was pretty much killed off...
why not just do a timesert on the blown one and buy the 98 and part it, youd make a killing parting the 98 here on the forum...
also i think the 98 due to being redesigned and on a completely different platform used entirely different mounts...

AaronZ34
01-19-07, 09:42 PM
they use completely different plug ins
people here have asked this before and it was pretty much killed off...
why not just do a timesert on the blown one and buy the 98 and part it, youd make a killing parting the 98 here on the forum...
also i think the 98 due to being redesigned and on a completely different platform used entirely different mounts...

The plug ins won't be an issue, I'd be swapping over the 94 sensors that are different (I can't imagine many are).

Because a timesert costs $300-$400, a full gasket kit costs nearly $200, and then you have the physical labor of pulling the entire block apart. And after you are all finished, the motor still has 87k on it. The 98 motor would need no tearing apart, just a few sensor swaps, and would only have 30k on it. And if the headgaskets and lower oil seal go later on, at least I would have gotten some 50k out of it.

I can also make a killing buying a STS for $1500, and selling it a week later for $8000.

The mounts shouldn't be a big deal, I'd just use the 98 mounts. I doubt the cradles are different, and even if they were, I can make new mounts anyways.

Cad tech
01-19-07, 09:51 PM
they are on the 98 STS mounting is different look at this thread

http://www.cadillacforums.com/forums/northstar-performance-technical-discussion/96064-am-i-screwed.html...

Buttttt......I really think you should be fine. but check with dealer or junkyard they have all the swap manuals...I have used a 96 up engine in a 92 Allante and it worked.

AaronZ34
01-19-07, 10:10 PM
Yah that sounds easy enough to get around.

I'm very mechanically inclined, and did a pretty complex engine swap in a previous Fiero of mine (And will be doing another this summer). I think I can figure it out.

Thanks for your help

zonie77
01-19-07, 10:58 PM
After you do it let us know what you ran into and how hard it was. That's the only way we get the knowledge to answer questions like yours.

When you have the engines out and side by side you'll fiure out what you need to do to get it to work!:D

If you find some differences try to take some pics. I know that can be hard if you're working alone.

AaronZ34
01-20-07, 03:40 PM
I'll let you know how it goes.

I was supposed to go look at the 94 today, but it started snowing. Maybe tomorrow.