I have an 85 Chevy C30, 2 wheel drive, V8 7.4L.
The engine is running great but it is having a deep sounding knock which is resonating through the drivers side tail pipe as a tick/tap (independent exhaust.) I changed the push rods and did a valve adjustment but to no avail. There is also an engine vibration (felt into the cab) at the beginning of acceleration in park.
I have am looking to narrow down the possibilities so I have some direction to go. I have heard rod/main bearings but with the sound only coming from one side of the exhaust has me doubting. I have also heard "Collapsed lifters" or a bent valve.
I am looking forward to any advice or direction you may offer. Thank you again.
have the same problem?
Sunday, November 22nd, 2009 AT 2:35 AM