Question about 1990 GMC Sierra

1 Answer

1990 GMC Sierra lifters knocking. Oil pressure

1990 GMC Sierra 1500 (5spd) lifters knocking. Engine lopes, when excelerated. Rpl PVC valve, changed oil, rpl spark plugs,new exhaust line. Oil pressure gauge low.Purchased with quite a bit of oil sludge. I've changed the oil several times since purchase at 115k, now at130k.Could this be a bad or clogged oil pump? Suggestions?

Posted by on

Ad

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.

    President:

    An expert whose answer got voted for 500 times.

  • GMC Master
  • 2,030 Answers

I doubt it....It could be a totally worn out engine.

Posted on Nov 13, 2009

Ad

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 2003 gmc Sierra half ton 4.8 liter that has a knock that sounds like lifters


There is,If you do the lifter you could be after something else,The noise sounds like a collapsed lifter,A collapse lifter can cause a misfire,The 2003 GMC sierra or I should say the 4.8 engines suffer from a cut O-ring between the oil pump screen and the oil pump causing oil areation,resulting in lifter noise,The noise will be present a cold start and then diminish at warm up.12_3_2012_8_08_44_am.gif

Dec 03, 2012 | 2003 GMC Sierra

2 Answers

Why is my 94 gmc c1500 low oil pressure.


You may have a bad oil sending unit this is located under the hood near the oil filter two wires are connected to it. i would change this and see if your problem persists, if so you could have an oil pump you wont hear anything until its too late. 20 psi is all you need to keep it alive. good luck

Apr 16, 2010 | 1994 GMC Sierra

3 Answers

I HAVE A LIKE LIGHT KNOCK OR TICKING IN ENGINE ITS WORST WHEN ITS COLD


ticking sounds that are worse when cold usually indicate a lifter issue or valve train

Lifters require pulling the intake and the heads

Mar 14, 2010 | 1997 GMC Sierra

1 Answer

Does 2004 GMC Sierra have a PVC Value?


The pcv is on the drivers side valve cover. It's an orifice type system and only needs to be checked for blockage which usually don't happen. If you can see through it don't replace it.

Dec 06, 2009 | 1990 GMC Sierra

2 Answers

MY 6L V8 makes a loud knocking noise only when it first starts for only about 30 seconds then you never hear any more knocking for the rest of the day Is this a valve problem?


In some oil filters they have anti drain back valves in them, what keeps oil in the filter when sitting for a long time. this helps get oil to ur top end quicker. If not i takes longer to get oil to ur rocker arms so you might hear a knocking or ticking for a while. Try when u do ur next oil change to get a filter it a anti drain back valve and that should help make that noise go away quicker.

Nov 17, 2009 | 2004 GMC Sierra 2500

1 Answer

2000 GMC SIERRA 2500 LIFTER NOISE


Try a cup of tranny fluid, Dextron, or whatever, in the crankcase. Or there are lots of lifter products at your local part store. I would certainly try that first. I assume your oil has been changed recently, and the level is good. You don't have to pull the heads, but you do have to remove the intake, and valve covers.

Sep 03, 2009 | 2000 GMC Sierra

2 Answers

2003 GMC Sierra Knock sensor and oil pressure??


the knock sensors are located below the intake plenum,or,upper intake manifold as some call it, they screw into the lower intake, the front one is sensor 1, the rear is sensor 2. it is wise to change both if you have some miles.since you are going to be buying a gasket set to do this job.the sensors are cheaper than the gaskets.

Jun 12, 2009 | 2004 GMC Sierra 1500 Crew Cab

3 Answers

Have a 1990 Z71 4wd that with loud engine knock.


I'd consider some fresh, clean oil & filter change first of all, if it hasn't been done . drive it for a while providing it isn't too bad, & see if it goes away, if not get back to us.

May 18, 2009 | 1990 Chevrolet C1500

3 Answers

GM truck vortec Eng oil pressure low with high engine noise


CHECK THE OIL PUMP SUMP TUBE O-RING. THEY COLLAPSE CAUSING THE OIL PUMP TO PULL AIR INSTEAD OF OIL. TO VERIFY OVER FILL ENGINE OIL AND CHECK ENGINE OIL PRESSURE. THIS IS A COMMON PROBLEM ON ALL NEWER GM V-8 ENGINES : 4.8 5.3 5.7 6.0

Feb 21, 2009 | 1998 GMC Sierra

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

Related Topics:

495 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

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

Answer questions

Manuals & User Guides

Loading...