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Noisy engine

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chevroletmb Enthusiast

chevroletmb

Posted
Posted

Info - Engine Knock on Cold Start #01-06-01-028A - (03/18/2003)

Engine Knock on Cold Start

1999-2002 Chevrolet and GMC C/K Pickup and Utility Models

 

2002 Cadillac Escalade (2WD)

 

with 4.8L, 5.3L or 6.0L Engine (VINs V, T, Z, U -- RPOs LR4, LM7, L59, LQ4)

 

This bulletin is being revised to add an additional engine to the models section. Please discard Corporate Bulletin Number 01-06-01-028 (Section 06-Engine).

 

Some of the above vehicles may exhibit an engine knock noise that begins in the first 19,000-24,000 km (12,000-15,000 mi) of use. The knock noise is most often noticed during initial start-up and typically disappears within the first 5-30 seconds (may last longer in extreme cold temperatures). The noise is usually more noticeable on the initial start-up when the temperature is below 10°C (50°F) and may be more pronounced on the first cold start following a long trip.

 

This noise may be caused by an interaction between carbon that has formed on the piston, the piston motion and the cylinder wall. GM Powertrain Engineering, and an analysis of engines with this condition, has confirmed that the noise is not detrimental to the performance, reliability or durability of the engine. THIS NOISE DOES NOT HAVE ANY EFFECT ON THE LONGEVITY OF ANY OF THE ENGINE COMPONENTS.

 

 

Important

At this time, attempts to repair this condition by replacing the engine assembly or pistons are not recommended.

 

 

Please share the information found in this bulletin with customers who inquire about this condition. In the event they have additional questions or concerns, please advise your Area Service Manager.

LogixRat Enthusiast

LogixRat

Posted
Posted
GM Powertrain Engineering, and an analysis of engines with this condition, has confirmed that the noise is not detrimental to the performance, reliability or durability of the engine. THIS NOISE DOES NOT HAVE ANY EFFECT ON THE LONGEVITY OF ANY OF THE ENGINE COMPONENTS.

 

 

Important

At this time, attempts to repair this condition by replacing the engine assembly or pistons are not recommended.

:lol::D:flag:

 

Give me a break. Let me slap a rod around inside your engine for thousands and thoustands of miles, and tell me ain't going to cause some premature wear. That statement is nothing but a bunch of bullcrap!! :wtf:

 

The lack of responsibility GM is taking for this matter is making me seriously doubt their overall quality for future vehicles. I know each manufacturer has their flaws, and their production runs that aren't quite up to par, but when that manufacturer refuses to fix the problem it makes me not want to spend more $$ with them. Both Ford and Dodge has had this problem, but did fix them. Granted it took them some time, but they did fix them. Time will tell the test of whether GM takes care of their customers or not.

chevroletmb Enthusiast

chevroletmb

Posted
Posted
[

 

Give me a break. Let me slap a rod around inside your engine for thousands and thoustands of miles, and tell me ain't going to cause some premature wear. That statement is nothing but a bunch of bullcrap!! :lol:

 

The lack of responsibility GM is taking for this matter is making me seriously doubt their overall quality for future vehicles. I know each manufacturer has their flaws, and their production runs that aren't quite up to par, but when that manufacturer refuses to fix the problem it makes me not want to spend more $$ with them. Both Ford and Dodge has had this problem, but did fix them. Granted it took them some time, but they did fix them. Time will tell the test of whether GM takes care of their customers or not.

this was posted on IATN (International Automotive Technitians Network) website

 

at least our trucks don't do this

 

 

 

2004 Dodge intrepid

 

Engine: 3.5 L / 6 cyl

Fuel: Fuel Injection

Ignition: Distributorless

Trans: Automatic

Mileage: 5,000 mi

VIN: [No VIN Available]

 

Misc Data: Police unit

Affected Item: connecting rod

Condition: cap let go

More Info: Repair history included below

 

____________________________________________________________

 

Vehicle was in a pursuit senerio. "on-it" in other words.

came in complaint "engine QUIT", there was no question about

this senerio, its a police car. Upon inspection showed hole

in oil pan on right side. oil leaked out all over under of

car. still dripping 1 day later. plenty of oil in system at

the time. from visual, through "inspection hole!" i could see

that the con rod cap had let go of its home. could see that

one stud was still there, twisted with cap attached. looks to

me that one bolt let go! anyone seen this? car went to

dealer, obviously under warranty, but is this going to be a

problem with these engines? cars are most likely of the R/T

type, so there are many out there! I am Questioning the

engine, as we have several that have had rear main leaks. at

under 10K? does not look good for police duty. and yes this

car was sold and bought for this purpose.

lrymal Senior Enthusiast

lrymal

Posted
Posted
Let me slap a rod around inside your engine for thousands and thoustands of miles, and tell me ain't going to cause some premature wear.

It isn't a rod issue....

GreenZ71 Enthusiast

GreenZ71

Posted
Posted

Try the FRAM oil filters with the PTFE additive - I tried it for kicks last year and the noise on start immediately stopped.

 

2001 Silverado LS Z71 5.3 70k Miles

miket Enthusiast

miket

Posted
Posted

It doesn't matter what it is or wether it causes an damage in the engine today or tomorrow.

 

I did not pay 40-50K for a rig like this to make that kind of noise and drink the oil it does. Obviously GM doesn't understand folks are unhappy about this and that is detrimental to their sales going forward.

 

This was my last american car purchase.

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