Q: Changed oil pump, still no pressure

asked by on

I changed the oil pump without removing oil pan, changed the o-ring, blew through the pickup tube to insure no clog, still tapping and no oil pressure. could the problem be in the oil cooler lines? please, any advice will help.
My car has an automatic transmission.

Hello. At this point, it would be wise to hook up a mechanical gauge at the oil switch port and see if you are truly experiencing a low oil pressure issue or if there is something else going on.

A general rule is that you should have 10 psi for every 1,000 RPMs. This is the best way to figure out if you need to pay attention to low pressure or a sensor and electrical issue.

Sludge build-up can clog even a new pump. If this is the problem, you will want to do a deeper cleaning. As far as the oil cooler lines are concerned, any clog in the system would cause low pressure issues. You could be looking at a rod and bearing repair, but that is assuming the pump is working and the rest of the system is in perfect condition. If you need help with a diagnostic, a certified technician from YourMechanic can come to your car’s location to inspect the oil pressure issue and follow through with repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Changed oil pump, still no pressure

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: Rear Wheel has bearing/seal issue

Hi there. If you're going to attempt to replace the wheel bearings on your 2004 Jeep Liberty, I highly suggest purchasing a service and repair manual, as it will provide you with a detailed list of replacement parts, seals, gaskets...

Q: Power steering is very stiff.

The noise is coming from the power steering pump. The noise is the veins in the pump are worn causing a scraping sound at high revolutions. I recommend replacing the power steering pump is there is no leaks and if...

Q: What about a 2003 H2 Hummer?

In most cases, this wire will be fore the wheel speed sensors if the vehicle has an anti-lock braking system or traction control system. The best thing to do would be to hire an experienced technician like one from YourMechanic...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...