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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: dtr118 on September 16, 2007, 09:28:30 am
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I have a 77 GMC stepside 2wd, I swapped the 350 with a 327. I got the engine to start yesterday but I do not register any oil pressure. I bought a new oil pressure switch and installed it, still no pressure. I pulled the valve cover off while it was running and there was oil in the valves. This truck has been sitting in my garage for about 10 years. Is there a chance the gage went bad? Is there another way I can check for Oil pressure?...thanks This is my first engine install, so I am just learning as I go.
Greg
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get a mechanical pressure guage and hook it up under the hood and check it. Was the factory guage working before?
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Thanks for the response. The gauge worked fine before, Where do I hook up the mechanical gauge to? and what kind of a gauge do I use?...thanks
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You can pick up a mechanical gauge at any autoparts store. Get a cheep one you can stick back in your tool box. (use it as a tool)
Hook it up where the pressure switch is plumbed in.
When you remove the switch check for any blockage in the block, use a flashlight and look into the hole.
Make sure no sealer is in the switch, hole inside should be clear of foreign matter.
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You can always check your pump by putting on a new oil filter. Turn the engine. See if oil filter fills w/ oil. Foolproof way to see if oil pump works when putting in a new engine.