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Old 10-23-2012, 02:26 AM
drainey48 drainey48 is offline
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Chevy 350 engine knocking

My dad has a 1972 El Camino with 350 CI engine and 4B Carb. It has 56000 miles, and the car rarely gets driven. Recently, it has developed a loud banging noise in the engine similar to the sound of a backfire. It's a very clean engine, so I know its not the exhaust. Im not sure if it's backfiring through the carburetor. How am I able to see if it's backfiring through the carburetor, and if it is what is causing that problem? I thought it might be a sticking valve, however, I have done some research and found it could be a worn camshaft, bent rod, etc. My dad is weary about me working with his cars internally, so I would like to be able to pinpoint the problem before I start working. Before I truly begin I plan to replace the gas with fresh gas and change the oil. I hate seeing a sick beauty. PLEASE HELP!!
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