Q: Oil pressure fluctuating and clicking noise from engine.

asked by on

I have a 1995 Jeep Grand Cherokee with a 5.2L v8. About 80,000 miles. I recently had an alignment done, and now I am having trouble with my oil pressure. (Probably not related.) When the engine is idling, the oil pressure is about 2/3 of the way up, and as I speed up, the oil pressure gauge wiggles and twitches, and sometimes drops to about half way. When I drive fast, (60mph or faster), the gauge stays around the 2/3 mark.

What concerns me most is that there is sort of a clicking noise coming from the engine. It doesn't sound quite like a "no oil" piston slap or whatever, but still it doesn't sound good.

I had the oil changed after it started, and I've checked it several times, and the oil levels are good. Also, no check engine lights or anything, and the engine temp and voltage and idle and everything seem normal.

My car has 80000 miles.
My car has an automatic transmission.

Hi there. The noise seems to be a lifter tap. Either a lifter is stuck or there is no oil to the lifter causing the rocker arm to tap and creating the noise you are hearing. Try putting one quart of Ford Type - F automatic transmission fluid in the engine and running the engine for 15 minutes at 3,000 rpm’s. This will thin out the oil to help clean up the lifters. Then change the oil and the filter with new oil and a new filter. This should clear up the lifter tap. However, if the noise does not go away, then I recommend replacing all of the lifters and cleaning out the push rods. If you need further assistance with your lifters tapping, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Oil pressure fluctuating and clicking noise from engine.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Can i swap à 4.3 chevy blazer four wheel drive into my 4.3 gmc Jimmy two wheel drive? 1995 Chevy Blazer

Hi - yes, the engine will bolt up, although some swapping of manifolds, accessory mounts, etc. may be required. The bigger issue is compatibility with engine electronics, which will include the transmission controller. Your are best off if you can...

Q: Temperature gauge jumping

Hello. If possible, it would be good to verify coolant temperature (with a laser thermometer or similar), to confirm that your temperature sensor and gauge are reporting temperature correctly. If so, it's possible that you have a blown head gasket...

Q: I accidently over filled my oil 1qt will I be alright

If you overfilled the oil the crankshaft could contact the oil in the pan and cause the oil to foam up and cause engine to suck in the aerated oil into the oil pump and this could cause bearings to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...