3.8 series 1 to series 2

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Apr 21, 2010 | 09:22 PM

nebstewart07

Thread Starter

Joined: Nov 2008

Posts: 62

From: Omaha, NE

3.8 series 1 to series 2

Is it possible to swap a 3.8 series 1 to a series 2 3.8?

Apr 21, 2010 | 09:52 PM

bumpin96monte

Joined: Feb 2008

Posts: 6,433

Yes, what kind of car is it in?

I'd imagine you'd need the complete powertrain, engine bay wiring harness, and pcm. Not sure how much the engine and trans mounts changed...

Last edited by bumpin96monte; Apr 21, 2010 at 10:44 PM.

Apr 21, 2010 | 10:42 PM

nebstewart07

Thread Starter

Joined: Nov 2008

Posts: 62

From: Omaha, NE

Actually my monte has a 3.4 liter in it. The car I would be swapping would be a 1995 Buick riviera with a 3800 series 1 with a motor form a 97 buick rivier 3.8 series 2

Apr 22, 2010 | 08:22 AM

MAMONTE

Monte Of The Month -- January 2010

Joined: May 2009

Posts: 8,464

From: San Jose, CA

I would imagine that, yes, you could make the swap. I would think you definitely need the pcm, wiring harness, etc.

Apr 22, 2010 | 11:43 AM

K-Mac Attack

Joined: Nov 2009

Posts: 40

From: Chicago

The long block should be the same. I would use the PCM from the 95 as it is going to be OBDI and the 97 will be OBDII. That could be a pain to deal with.

Apr 22, 2010 | 08:56 PM

bumpin96monte

Joined: Feb 2008

Posts: 6,433

Quote:

The long block should be the same. I would use the PCM from the 95 as it is going to be OBDI and the 97 will be OBDII. That could be a pain to deal with.

SI and SII bottom ends are not the same for sure.

Also, if you switched over the engine bay wiring, I'd make the changes to the obd port inside too- I'd way rather have an obd2 pcm for tuning options later.