Low Compression

[TGP Nick]

It doesn't have to be a 93.  Any 3.1 from 1989-1993 will work fine.  It should drop right in, just swap over your turbo specific parts.

Just re-ring it, clean up the bores, check tolerances and install some new bearings.

Very good idea.

[mfewtrail]

to have all 3 that consistently bad makes me think you might have a bad headgasket?

Exactly what I was thinking. I thought I posted that earlier, but I guess my post didn't go through when I hit submit. Every now and then I get errors on the board when submitting new posts...

[cobracmdr]

It doesn't have to be a 93.  Any 3.1 from 1989-1993 will work fine.  It should drop right in, just swap over your turbo specific parts.

Very good idea.

Yes nick but a 93 block has stronger cross webbing I think and better head design.  If he was to go that route but I'm pushing for a head gasket to be honest.  It is a cheep repair if you do it yourself and you don't have to pull the motor, hell you can just replace the front head gasket and see where that takes you, that should be easy.

Ken

[dogginred90]

I agree the head gaskets are not that hard to do. In my opionon you might as well do both of them if you go that route. And get new head bolts they are cheap and give you a peace of mind.

[killinprixs]

the better flowing heads on the TGP were specific to turbo 3.1s in 89-90... you find them on 91 --> NA 3.1s. But i agree its probably the head gasket... the car is 18 years old and those gaskets deteriorate, if it hasnt been done before its probably a good idea. 

[cobracmdr]

Something I wish I had done was 4.3 vortec v6 swap......I opted for the 3400 because I knew how to do it and it was already setup for front drive.  4.3 I think you just have to redrill the starter holes in the block on the other side.  Hmmmmm no more projects Ken!

[TGed]

4.3's sounds like butt, just like a L67.  The 660's have a good tune when properly exhausted.