When engine idles or runs at low rpms my oil pressure drops below redline. There is also a clicking noise on the passenger side of the pickup. Could this be an oil pump issue and if so how do you change an oil pump?
Depending on tone and depth of "clicking" it could be anything from lifters to connecting rods or piston pins....
cheapest to expensive:
Replace oil filter
if that doesn't do it (which it doesn't sound like it),
Replace engine...
Because clicking/ticking/clunking noises while having a "low oil pressure" issue (most of the time) means the engine is destroying itself.
SOURCE: Low oil pressure on 2001 Suburban
your oil sensor comes on at less than ten psi, you may have internal engine damage how many miles on engine, any gum up inside engine, you can try to put on a high pressure high volume melling oil pump to try to help for the time being, but you may need to have it torn and repaired.
SOURCE: 95 Monte Carlo Idle Fast and Have low oil pressure
95 monte carlo is idling high we just replaced the intake manifold gasket. How do I fix this and could I have caused it.
SOURCE: oil pressure low when idling. When running engine
That is normal, my truck , if it had a light , it would be on, the gauge goes to about 0 when idling and flies right back up when going, When it stops moving is when I'll get worried about it. You might try heavier oil this summer and see if that changes anything. Go with a 10w40. If you are already using this, try straight 40 one time. Hope this helps.
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SOURCE: low oil pressure indicator at low rpms (idle) '97 olds V8
Thicker oil is all you need. 5w30 is too thin when it warms up and the sensor cant pick up the flow going past. 10w40 should stop all the issues
SOURCE: 2006 H2, 113K miles. DIC indicated Low Oil
Did you try changing the actual oil pressure gauge?
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My oil pressure needle would move a little before this but never this much. I've had a bad main seal on the front of the engine and have had a slow oil leak for 6 months now. I've been making sure the oil level stays where it needs to until I can overhaul the engine. Now my oil pressure drops below redline and the red engine light comes on until I pick up the rpms again. This just started about a week ago. Is it the oil pump or something else?
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