6.0 CHIRP dry fire
#1
6.0 CHIRP dry fire
Hi everyone. I just finished building my second 6.0L. The first one lasted 6k then spun a rod bearing. This time its bored 30, forged bottom end, comp 273lr cam, ls6 intake. I busted it off yesterday and there is a chirping every 2nd revolution. There is not a belt on the car and the tranny is not yet in. The chirp sounds like it is coming from the drivers side. anyone know what this could be?
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The first go around i plastic gauged the clearances. This time I had a shop put the bottom end together for me. Rods rubbing would be every revolution not every other right?? I marked the harmonic balancer with white chalk and it does chirp every other revolution. If its every other it has to be exhaust or intake i believe. The lifters are new. My pushrods are comp and are not bent. Rockers tight. I put the plugs in before i put the heads on so i dont see that being an issue but i will check. The motor turns over without binding. would a clogged vacuum line chrip like this? when i turn the motor with the throttle pinned in full flood it chirps too. and its consistent. i will check the plugs tomorrow any other ideas to throw in the pool??
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#9
ModSquad
iTrader: (6)
Maybe push rod diameter too large, rubbing on passage in heads? Aftermarket rockers rubbing inside heads? Just thinking out loud...
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the pushrods, heads, and plugs are the same ones i had on the last motor and there wasn't a squeak then. could that be the difference in lifters from oreillys for $13.00, and the ones from gm for $ 50.00 ?
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alright guys found the problem. thanks for all the help it was my dumb mistake that made it chirp. i had the problem narrowed down to the drivers side so i pulled the plugs and turned over the motor. the chirp was gone. that narrowed me down to something compression related so i had someone turn the motor while i listened with a hose to try to isolate the problem. when i pulled my hose up to move it to another location i noticed there was gas on the end of it. long story short i had swapped my drivers side head with the passenger and a guide rod stayed in the head with one in the same side of the block so when i torqued the head down it smashed the guide rods off deep in the head and block. luckily the one in the block was exposed about a 1/4 of an inch and i was able to remove it. thanks for all the replys