Question about 1995 Chevrolet Tahoe

1 Answer

Has a low knocking noise when oil pressure drops

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 422 Answers

Time to rebuild if it bothers you or just use a thicker oil until it craters

Posted on Nov 20, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Low Oil Pressure and Engine light illuminated in a 2009 Saturn Outlook with 97k miles. Car having issues starting, some engine noise, no knocking.


Potentially could be an oil pump, as if you have a situation where oil pump pressure drops due to a failure in the pump, the motor could make some noise from lack of oil and the MIL light/Oil Light would illuminate due to lack of oil pressure.

Feb 23, 2017 | 2009 Saturn Outlook

1 Answer

My 98 blazer sounds great until it gets warm


I switched to Lucas oil with adding Lucas oil stabilizer and it increased my low oil pressure problem

Mar 13, 2012 | 1998 Chevrolet Blazer

1 Answer

2003 Taurus. Oil light came on. Checked level. Good. Drove another 5 miles, now have engine knock on top side of motor. Thought maybe oil pump malfunction. In the middle of nowhere, drove 50 miles home....


Before driving it anymore I would have someone test the actual oil pressure using a mechanical test gauge to see how much , or little, oil pressure you actually have. The knocking noise could be a hydraulic lifter that is partially collapsed due to low oil pressure or a rod bearing that has been damaged from low oil pressure. If it is just a lifter that is making noise then there's a pretty good chance that the lifter will quiet back down once the oil pressure is normal again. If it turns out that your oil pressure is normal both at an idle and at highway speeds then the noise may be unrelated. You can cause some serious damage by continuing to operate any engine that is low on oil pressure even if the dipstick shows it to be full of oil. Hope this helps and good luck!

May 10, 2011 | Ford Taurus Cars & Trucks

1 Answer

Low oil pressure at stop and knocking sound


First check the oil level and condition. Have your trucks oil pressure actually checked with a gage. It should be at least 42p.s.i. to 55p.s.i. The knocking noise is probably related to low oil pressure. Depending on the type of knock it could be crank shaft bearings, piston wrist pins, rod bearings, cam bearings or noisy lifters. All a result from low oil or pressure. 3 possible causes, are low oil level and pressure, lack of oil changes and viscosity of oil breaks down to where it can't lubricate or dissipate heat and coolant getting into oil, reduces pressure and prematurely wears down bearings. Have it properly diagnosed before you seize your engine solid.

Apr 06, 2011 | 1993 Chevrolet Suburban

1 Answer

My oil pressure gauge is floating left to right....


I would replace the sending unit. It is an easy and cheap replacement compared to solving low oil pressure issues. If you really had low oil pressure than you would have heard noises like lifters clicking, rod knocks, etc.

Feb 20, 2010 | 2005 Dodge Ram 1500

1 Answer

When first starting the 2000 jeep grand cherokee the oil pressure is fine, after driving 15 to 20 miles when you stop the oil pressure guage indicates the pressure dropping near 10 pds or less and the...


When the pressure reads low, are you hearing any knocking or tapping noises from the engine? If so, you may have worn engine bearings. I'd check the actual pressure by having a mechanical gauge installed on it in order to determine the actual pressure (your gauge is electro-mechanical and not quite as accurate) If pressure is actually that low the oil pan must be removed and bearings, oil screen etc need to be checked.
The reason pressure is always higher at first is that when cold the oil itself is thicker...as it gets hot and thins out pressure will drop somewhat, but should not go that low. Only other thing that can affect pressure in that way would be either a bad sending unit (you will know that after testing) or gasoline contamination in oil (happens if an injector is not working properly)
Good luck with it!

Jan 04, 2010 | 2000 Jeep Grand Cherokee

1 Answer

KNOCKING ENGINE


Hi. There are two main issues that will cause the engine to knock. The first will be the oil pump. If the oil pump is failing, or damaged, this will produce a low oil pressure state. Low oil pressure will cause the internals to not receive the necessary lubrication needed for optimal performance. This low pressure state will cause the rod bearings to ware, thus, producing this knocking noise. This will be accompanied by a low pressure, or illuminated oil light. The next issue will be worn, or damaged rod bearings. These vital bearings can fail if the bearing clearance is excessive, or worn. They will, also, fail if the oil supply is not sufficient. This inspection will require you to drain all oil and coolant, and the dropping of the oil pan, to expose these bearings.Worn, or excessive bearing clearances will cause a knock.

NOTE_ There is another issue that i should warn of. If There is sufficient sludge build up in this engine, due to not changing the oil regularly, or not administering scheduled engine flushing, this will cause the internal oil ports to clog up, thus, inducing poor oil circulation. This will damage the entire engine. If you have not had this engine flushed, i would recommend to schedule this , asap.

Dec 08, 2009 | 1996 Ford Explorer

1 Answer

Engine knock hard over 2500 rpm


Does the oil light come on or the knock occur during the engine warm up after a cold start?
There could be a couple of problems causing the issue. You could have an oil pressure pump or pump pressure regulator sticking. I would have a mechanical oil pressure gauge installed and verify oil pressure at idle and 2500 rpms to make sure oil pressure is in normal ranges.
You could also have excessive piston rod bearing, crankshaft bearing or cam shaft bearing wear that will cause oil pressure to drop too low to prevent the rod knock your hearing at 2500 rpm.
You said a knock and not a ticking noise,so I don't believe a lifter is the issue at 2500 rpm.
Start with the oil pressure check and go from there.
Let me know.
Regards,

Aug 22, 2009 | 1996 Dodge Stratus

1 Answer

Loud ticking noise


Ticking is generally associated with a valvetrain problem but may be caused by low oil level or pressure. Noise is in the upper half of the engine. Knocking is from low oil pressure and is caused by worn bearings causing pressure loss. Knocking is the worse of both conditions (means overhaul or engine replacement.) Ticking needs to be checked for it's cause...if cause is low oil pressure, remember...oil pumps don't cause low oil pressure, pressure will lost if bearings are worn or pump inlet screen is plugged with carbon.

Jul 18, 2009 | 1999 Jeep Cherokee

1 Answer

2002 jeep wrangler oil pressure gauge drops


When the gauge is at 0, is there any noise from the engine (tick, knock etc?) I would have someone put a mechanical gauge on there and read true pressure.Your driving pressure seems OK but if the low number is "real" something is wrong!

May 30, 2009 | 2002 Jeep Wrangler

Not finding what you are looking for?
1995 Chevrolet Tahoe Logo

Related Topics:

59 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75051 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7726 Answers

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

Answer questions

Manuals & User Guides

Loading...