Sup tuners

[7boltnewbie]

I recently bought a 95 gst for cheap. It has 147k on it and needs work. Turbo is shot and #3 cyl has minimal compression. I took the engine out today but didnt tear it down yet. I tried to see if the crank had any play in it as far as "walking" is concerned and did not feel any give. I have no experience with this engine, but Ive done research online here for a few days to educate myself. I am well aware of the crank walk issue but Im still vague on the solution for the problem or if the 7 bolt is just a useless engine from jump. On one hand the tuner forums are saying to just swap in a 6 bolt, and on the other, I read that the dealerships were installing "updated" cranks and bearings to solve the issue. I am a tech at a chevy dealership and would have no problem overhauling the engine myself. I am trying to go the cheapest route as these engines a f#$%ing expensive. I will be tearing the engine down to see the condition of the internals in the next day or so. Any input would be appreciated. Also anyone who lives on Long Island thats into these cars give me a shout.

 

[rgurleyjr81]

Unless you have access to a cheap 6 bolt block, I'd say rebuild the 7 bolt as long as there's no signs of crankwalk. It's up to you, that's what I would do though. [Don't try to sneak in plugs. PM possible customers.]

 

[TurboDSM86]

i'd suggest after tearing down the motor and finding the compression problem to make a price list and add it up. then do the same for a 6 bolt motor and a good rebuild on it. the 7 bolt even after being rebuilt still has a chance for CW. my 7 bolt crank walked after 26K, it was mitsu OEM long block and installed by a mitsu dealer. you can get pretty cheap 6 bolts with lower miles on them if you search enough. the swap isnt hard and might be worth your time. good luck and welcome to the dsm community

 

[7boltnewbie]

I tore down the engine tonight and found .005" of play in the crank. rings were worn but none were broken.

 

[evolvingGS-t]

I've researched myself and have found that walking crank comes from excessive pressure being pushed against the crank. Not just a crank that was manufactured out of spec from Mitsu.
I guess what I am saying is that either way, you're, or anyone, is prone to it.