Question about Pontiac Grand Am

1 Answer

Can oil pressure be regained after a substantial loss due to faulty sending unit? (if oil cahnge don't seem to be enough!)

Posted by on

  • 1 more comment 
  • loni grindle Apr 19, 2009

    at this point yes, it is only a suspision. considering that the sending units are notorious for failing i figured it would be the main culprit! the the oil pressure will be tested in the morning but its evident that their has been a loss. any suggestions i may want to check into regarding possible loss' ?

  • Roberta Smith
    Roberta Smith May 11, 2010

    loss of oil pressure can be anything from not enough oil in the oil pan to a failed oil pump... excessive engine wear in particular the crankshaft bearings... or cam bearings.... how many miles do you have on that engine ? incidentally.... whenever your oil pressure drops your first thought should be that the oil pump has failed.... stop driving it till your oil pressure is checked... low oil pressure can lead to alot of engine problems

  • Roberta Smith
    Roberta Smith May 11, 2010

    you suspect it is the sending unit.... you have had the oil pressure checked ?



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 90 Answers

Your oil pressure can be effected by several things. If you visually look at the sensor with the vehicle running you can usually see the oil coming out of the top of the sensor. Also look at the engine to see where oil is dripping from. Valve cover gaskets, pan gaskets, front and rear oil seals all have a tendency to leak especially the rear seal.
Regarding your oil pressure, if the oil is full then you should have pressure unless the pump is bad. The only other reasons for lower oil pressures are if you ran the engine out of oil and spun a bearing or two. Got the engine hot and caused the oil pressure bypass spring to loose its strength thus lowering the pressure. A plugged oil filter, etc. can lower it also. If you have a newer vehicle, they are built to run at lower oil pressures than older carburated vehicles do. This is the biggest reason that newer vehicles have no oil pressure gage in them. Good Luck, RAC

Posted on Apr 19, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Engine oil light flashing

Flashing oil light indicates a loss of oil pressure. No oil pressure will cause the engine to seize up. Check the oil level, if full verify that the oil sending unit is connected correctly. Listen for unusual engine noise (Shut down immediately to avoid damage to the engine), connect an oil pressure gauge to the oil sending port (remove sending unit) and verify oil pressure. the issue could be a loose connection, broken connection or plugged sending unit, as well as loss of oil pressure.

Sep 01, 2015 | Cars & Trucks

2 Answers

Oil pressure loss 2005 ford expedition

if your losing oil pressure then it could be oil pump, bearing wear, worn mechanical parts like camshaft, lifters. it has to be checked out to know exactly what is wrong.

Apr 22, 2015 | 2005 Ford Expedition

1 Answer

What causes a rattling noise in my engine when i hit the accelerator?

"Rattling" is normally due to one of two things:
  1. On heavy acceleration, rattling is usually due to low octane fuel.
  2. If at all times, it can be due to low oil pressure.

    Rattling can also occur if the engine timing is way out specs. This will normally be accompanied by a substantial loss of power on acceleration.

Aug 04, 2014 | 2002 Toyota Camry

1 Answer

Caterpillar 330cl c-9 engine ecm reading low oil prressure and the manual guage shows the correct pressure

change the oil pressure sending unit on the eng. if this goes bad it sends the wrong voltage to the computer which will then detune the engine to reduce the chance of damage due to low oil pressure . Good Luck

Feb 25, 2014 | 2002 Oldsmobile Bravada

1 Answer

Less than 1000 miles on new motor ,new oil pump,pressure drops for no apparent reason.have done 2 oil & filter changes,so sludge is ruled out. im thinking oil sending unit

Yes, faulty sending unit or gauge itself could be the problem. The oil sump pickup could also be loose...causing a temporary loss of oil psi when you corner and brake.
With oil pressure you don't want to take chances....i would connect a manual gauge and monitor, just to be could save your new engine from bearing failure.

Aug 20, 2011 | 1998 Dodge Dakota

2 Answers

I have a 1995 Chevy Lumina with the ''Low Oil'' light on.

may be the oil sending unit is bad
may be the oil pump
is there any noise in the engine?
have the oil pressure check at a repair shop to make sure you have enough oil pressure
if it's ok then have the shop replace the switch while they have the old one out to check the pressure

Mar 09, 2010 | 1995 Chevrolet Lumina

2 Answers

Oil pressure loss

the 1st thing u do is have the oil pressure tested with a test mechanical gauge by a shop, most times it is just the oil pressure sending unit is defective, but never assume that is the problem, low oil pressure will distroy a $5000.00 engine very quickly, u can just try a new sending unit, but highly recommend a pressure test with a mechanical gauge before you run the engine anymore.

Dec 05, 2009 | 2000 Jeep Cherokee

1 Answer

Loss of oil presure

One of your pressure sending units has failed. You will have to get this professionally repaired unless you are a REALLY GOOD mechanic. It involves tearing down the top part of the motor. That sound your hearing is a sticky valve and this occurs because of top end oil deprivation. Get it fixed soon and you will be ok. If not it will burn up valves and you don't want to go there$$$.

Feb 11, 2009 | 1992 Jeep Cherokee Briarwood

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

222 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides