View Single Post
Old 09-12-2017, 05:30 PM   #12
Registered User
72_swb's Avatar
Join Date: Feb 2014
Location: dallas area
Posts: 209
Re: Any idea on what this knocking is 72 C20 350

^ good info. To add. If everything checks out you can run the engine with the valve cover off and put a hammer handle or something on the studs of the rockers. You'll be able to feel the tapping or grinding from the bad one. If that's your problem.
72_swb is offline   Reply With Quote