Question about 2003 Chevrolet Avalanche

1 Answer

Piston slap I think I have piston slap. Started in cold weather. Only when engine warmed up. Now is as soon as it starts and does not stop. Is this piston slap and how do I fix it?

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 11 Answers

I think my friend, you should look towards getting your engine replaced. If you hear like a clicking or clunk noise while you drive, the internals of your engine are worn out and hitting against each other.
Your options are:
1. Scrap car or sell it
2. Swap engine for a new one
3. Get the engine reconditioned

Posted on May 04, 2013

Ad

3 Suggested Answers

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.
New users get to try the service completely Free afterwhich it costs $6 per call 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
  • 74 Answers

SOURCE: 1996 C2500 Suburban 7.4, hard starting and has OBDII code of P174

p0174= too much oxygen. have your mass air flow sensor cleaned or replaced

Posted on Feb 18, 2009

  • 95 Answers

SOURCE: engine wants to stall in cold weather

I don't beleive this is a weather problem. Try tuning it up and see if it helps. Good luck

Posted on Mar 23, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Engine got a knocking cold start, silint when hot


It has developed a clicking engine noise on a cold start. After the car has warmed up, the sound goes away. ... Clicking or a sharp tapping from the valve cover on top of the engine would point to a valve train noise. A dull tapping or slapping sound from the side of the engine block would point more toward piston slap.4 Nov 2011

Cold-start engine clicking is a nuisance, not a disaster - StarTribune.com


Dec 13, 2016 | Cars & Trucks

1 Answer

2001 azteck 49000 miles use very little once every


The 3.4L engine has special pistons that are designed to expand as the engine heats up. When the engine is cold, the pistons make a knocking sound that resembles lifter noise or piston slap. As long as the noise goes away after the engine warms up, don't sweat it; this is normal.

Sep 17, 2014 | 2001 Pontiac Aztek

2 Answers

Cold knock then subsides


it is possibly piston slap,which is normal,some car company like GM also use slightly bigger gap between piston and cylinder on (3.1,3.4,3.8 liter engines) to help engine last longer,in return you get some piston slap when ENG cold,if it goes away after it warms up don't worry,it is normal

Nov 12, 2013 | Mitsubishi Galant Cars & Trucks

1 Answer

It has rough idle when you first start it then straightens out after warming up


sounds like low compression at start up do to piston slap and not alowing car to warm up over the years before driving off. 3.1, 3.4, 3.5 motor pistons are exact size at operating temp there for cold temps at start up cause the pistons to slap the cylinder wall.. Gm engineers did this to reduce operating temp while driving by lowering friction in the cylinder. problem is most people these days start there cars and take off down the road..my suggesting would be to check piston compersion at operating temp and see if it meets spefications for ur mottor before replacing any other parts...

Aug 16, 2012 | 1995 Oldsmobile Cutlass Supreme

1 Answer

Alfa 147 80000 miles on an 02 plate when warm the idling noise is louder for about 30 secs then dissapears doesn't happen when cold!


If in all other respects the engine seems to be fine, then it's most likely piston slap. It's a sign of a worn engine and the only cure is a rebuild, but in itself, piston slap is just an annoyance rather than a problem. The piston bores are tighter when the engine is cold and so the pistons are more tightly constrained and less able to slap.

But at 80k miles you really shouldn't have piston slap yet, even on an Alfa. I suggest that you take the car to an experienced mechanic to get the oil pressure checked: it could be that the oil pump is failing and if that goes completely you will be looking at a replacement engine due to consequential damage. Used Alfa 147's of that age are usually dirt cheap though, so if you do need a donor engine it may prove to be more cost effective to sell yours for spares and buy another 147.

Mar 10, 2011 | Alfa Romeo 145 Cars & Trucks

1 Answer

I have a knocking noise in my 2002 chev tahoe when I crank it up in the mornings,the colder it is the louder the knock.After about 30 sec. it stops and you don't hear it anymore.what's wrong?


It's called piston slap, what happens is that when the engine start to get a few more miles in it's life. The clearance between the piston and cylinder walls are greater then when the piston are warmed up and has expanded.
You can add Lucas oil treatment to you engine oil to put a film of oil along the cylinder walls, so when you start the engine there is a coating of oil there that will help your engine to last longer. Just follow the instructions and try not to drive the Tahoe until the engine has warmed up a bit, the winter will be more noticeable and will take longer for the piston slap to go away.
Gm has a up graded program to address the piston slap to help make the engine last longer. Believe it's covered under the TSB if you bring it in to have it addressed. The program simply turns the timing back on the engine when it's cold to help eliminate most of the knocking and is helpful in making the engine last longer. As the engine warms up, the program brings the timing back to where it should be to not economy and performance is lost.
Thank you for using fixya and good luck.

Jun 15, 2010 | 2002 Chevrolet Tahoe

1 Answer

Subaru impreza sport 1999 piston slap


Rebuilding the engine is the only true cure. Be sure that the engine warms up without driving it. In other words, don't put any excessive load on the engine while it is cold. Once it warms up, the piston, rings, pins, etc. will expand from the heat. This is why you only hear slapping when the engine is cold.

May 22, 2010 | 1999 Subaru Impreza

1 Answer

Experiencing a "ticking" "knocking" type noise when 1st starting the car in colder weather that goes away once the blazer warms up , any help ?? I was told it could be the exhaust manifold , or piston...


it may need a lifter or valve adjustment when cold they will tick or knock depending on how loose or worn out then when it warms up they swell with heast and noise stops. after adjusting or replacing it will stop making noise

Oct 26, 2009 | 2002 Chevrolet Blazer

2 Answers

Engine noise


getting good lubrication flow to the top end of the engine ? maybe some lubrication flow is being blocked to the top of the engine and you hear valve system noise.

Jun 17, 2009 | 2006 Suzuki Forenza

2 Answers

Ticking when cold


you arent getting enough oil to your lifters,,,,check you oil and see where its at level wise

Dec 25, 2008 | 2002 Chevrolet Silverado 1500

Not finding what you are looking for?
2003 Chevrolet Avalanche Logo

198 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8499 Answers

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

Answer questions

Manuals & User Guides

Loading...