Swapping a 3.4 for 3.1, 1996 grand prix

[mustang51]

Looking for any articles or posts on doing this swap.

[bszopi]

Just so I make sure I understand, you current have a 3.4 (assume its a 3400), and want to swap in a 3.1 (again, assuming its a 3100)? You mention 1996, but can we get an idea of what car we are talking about? That would help a lot with trying to get you some info.

Brad
via Moto X

[carbon]

Uh... the name of the thread has 96 Grand Prix in it... Did he edit the title?

and to me since the GP base had a 3100, I assume he's wantin' a 3400.

[bszopi]

No, that's just Tapatalk failing on me...

Brad
via Moto X

[bszopi]

This isn't for a 96 GP, but it is still a helpful guide for going from a small port 3100 to a 3400.

http://60degreev6.com/forum/local_links.php?action=jump&catid=14&id=57

[mustang51]

Hi Brad, I am replacing the 3.4L DOHC (POS) in a 1996 Grand Prix SE with a 3100. I have the 3.4L out (last night), what a frustrating removal out the top. When you have to remove a CV joint to remove the alternator, that is ridiculous! The engineer should be sent back to school! Anyways, it looks like I will have to replace the wiring harness from the firewall forward. I have been told I can use the same computer?? After that the next hurdle will be the A/C compressor. I have changed out quite few 3100's on this generation of Grand Prix. I like the GTP's but really dislike the 3.4L DOHC, just a pain to work on. If this goes well, I plan on doing more of these swaps on GTP's. Any help would be appreciated!

[bszopi]

There was someone on here who did that same swap a couple years ago. Can't remember who right now, but the documented it all on the site. If I can remember who, and find the thread, I'll post a link.

Brad
via Moto X

[bszopi]

Found it! http://60degreev6.com/forum/showthre...-DOHC-for-3X00 Hopefully some things in there will help you out.

[bszopi]

And here is the actual swap thread (once I started looking through the first one, realized it wasn't the actual swap thread). He put in a 3500 (LX9), but for the most part, everything should be relatively similar.

http://60degreev6.com/forum/showthread.php/47806-3500-Swap-Finally-Underway-a-few-questions