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I removed the crank from the engine I am going to put in my 95 Monte and I noticed that the crank is stamped 3.1. Do both engines use the same crank or do I have a problem. With the pistons in they reach TDC and the bearings fit well. Any info?
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Hmm .. I heard the 3.4L DOHC crank is the same thing as even the 2.8L crank ..
If not, free bump
lol
-JayNew member of 200,000 mile club as of May 16, 2005
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yes the 3.1l crank and the 3.4L crank are identical, when my brother had his motor rebuilt they put in a 3.1 crank in it, the only difference that i am aware of is the 3.4L has a stronger crank in it, so it can take more power and whatnot.so if your crank say 3.1 on it then it must have been replaced from a 3.1l before. it will work fine but from my understanding dont run much more power than stock or it could fracture, but im not sure i would get some more input.
JakeGM Goodwrench Tech - GM Certified
1991 Pontiac Grand Prix GTP - 3.4L DOHC , 5 Speed Manual Transmission , Turbonetics 62mm turbo, Turbonectics Evolution Wastegate , Turbonetics Raptor BOV , Large Front Mount Intercooler , AEM Methanol Injection , Car is running at 11PSI currently with methanol injection.
Runs 13.4 In the 1/4 with a 3 second 60 footComment
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