Oil Pump Working?
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Junior User
Joined: Nov 2006
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Oil Pump Working?
Working on a project 7.3 DI engine. No oil pressure reading when cranking. Switched out what I believe is the op sensor on the top front of the block (looks like the op sensor in my 302)... still no reading. Register about 5.3 V when key is on at connector fitting. No oil squirts when I leave the connector out and crank. Oil level is good. Block heater feeds into the oil filter housing but the oil is cold. Coolant is warm... is there a coolant feed there too? Appreciate the help in advance. Josh
Posting Guru
Joined: Nov 2006
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From: Herndon KY
That is the oil pressure sensor from your discription, it is located on top of the HPOP (high pressure oil Pump) I do not get an oil pressure reading until my truck fires. there should be oil in the area, if there is not pretty much full oil there the truck will not fire, as the oil actuates the fuel injectors, if there is no oil in there fill it up and try again. Good luck
Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
yes add a quart or so of oil to that top reservior. It may prime the engine enough to get everything flowing. Also there is a oil pressure plug down near the block heater that you could tap to see whats going on. If the system hasn't been primed then where you are testing could be problematic to getting an accurate measurement.
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She Runs!
Two batteries, a starter, six tires and eight glow plugs later she runs. Thanks again for all the help guys
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