Posted by Duane WI on June 12, 2015 at 18:32:51 from (174.125.246.158):
I have a 1958 Chevy 235 Six Cylinder engine in an old pickup truck. The engine has hydraulic lifters. I was out driving around today. After about 20 miles I stopped and got gas. When I restarted the engine the lifters where very noising. I looked at the oil gauge and zero pressure. I was about a 1.5 miles from home so I decided to run it home. After about a half mile the oil pressure came back up and the lifters settled down. Got home and turned it off. Let it sit for an hour. Restarted and everything seems normal. I am thinking the pressure relief valve on the oil pump stuck open. Anything else I should check? Normal oil pressure is 25 psi which I believe is normal for this engine.
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