i am putting a new gsr engine in my ls the engines block is rebuilt for turbo when we first started it up it made a loud banging noise and it smelt like **** and then it went away and cameback when the bangin noise stops it doesnt smell anymore either. we didnt do the timing yet that is what alot of my friends are telling me thats probobaly the problem. first we thought the pistons were hitting something but it went away if anybody had this same problem let me know help me out guys thanks

 

It may have needed time to build up oil pressure if the motor was sitting around for a while. Did you crank it for a bit without starting it at first. As for the smell, some oil may have gotten into the cylinders and was just being burned off.

 

it was sitting around for a little bit but it hasn t been ran since the rebuild and we spun the crank it sounded normal same as when we spun the ls

 

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