Hey everyone... I recently installed my chevy 400 into my 79 Trans am the engine is 40 over, 292/512 crane cam, ported iron 2.02-1.60 heads, new 3.75 stroke crank, holley 4160-750 cfm carb and a edelbrock eps permastar intake.
I bought the engine from a engine builder out of Indianapolis. This engine is suppose to produce 425HP. Well to make along story short I've had numerous problems with this beast that I have had to fix like the oil galley plug on the driver side beneath the head on the backside of the engine that was left out. Or the rear main seal that was incorrect for the application. The rear main seal should have been a aligned bore seal, thus causing a huge oil leak. Anyway I finally got all of that fixed and had the engine running strong when I was driving down the road about 40MPH and all hell broke loose I heard a pop and then a huge cloud of smoke out of my left exaust and then a bad knocking. I pulled over and then saw coolant pouring out of my left exhaust. I got the car home and pulled the plugs from the driver side and noticed the #5 cylinder spark plug had been dented/ bent and there was coolant in there as well as the #3 cylinder. The engine will turnover but knocks, I don't want to turn it over anymore. The engine only has 100 miles on it and was broken in correctly. Does anyone have any ideas what could have possibly happened?