2004 piston slap

any 2004's out there with piston slap evident??

that $3500 cash back right now looks good but not if the piston slap is still around.

juma

I have an 04 with the 5.3 and 9,000 miles no slap what so ever

I Have A 2004 With The 4.8, No Piston Slap. Good Luck

I heard from someone (not a salesman) that GM had fixed that problem for 2004. I've got a 2004 2500HD w/6.0 liter with no slap.

I have a 04 1500 with 3500 miles no slap and great gas milage! Go out and get one! Mine is the 4.8 by the way

My Grand Dad has an 04 with the 5.3, just had its first oil change and no slap. He also had a 2000, traded it to the 04, it had 36,000 miles and the 5.3 and no slap either, lol.

I had heard that the problem was particularly bad in two years, but could remember whether it was '01/'02 or '02/'03. Either way, the problem is supposed to be fixed now. It may have been fixed for '03.

Mine is an '01 with a 4.8 and 50k. No slap noises here.

I think the term "piston slap" has been greatly abused!

If you Rap an engine with slap, you get a quick multible tick during decel, most people experience a tick during idle.
My 1998 3.1 Malibu piston slap problem turned out to be a lazy harmless lifter.

Just something to think about!

-Mike

I have a 2000 2500 with 6.0ltr and I have piston slap. The truck has 120,000 kms. It seems to have gottin worse since changing over to synthetic oil. I bought the truck used with an extended warranty so I will be getting a compression check before the warranty runs out. I will start the motor for about a minute before driving as I don't like excelerating when the motor is knocking. It seems if you give it a chance to warm up there is less knocking. Other than that the engine runs good. Doesn't burn oil and power is good. gets about 18mpg and 11mpg pulling the rv.

i got a 2004 Silverado 2500 6.0 gas engine.. I get that noise when it starts cold.. .and sometimes when it's warm and idle. I hear a slight pinging noise in the engine.

any 2004's out there with piston slap evident??

that $3500 cash back right now looks good but not if the piston slap is still around.

juma

piston slappage ended in 2002. 2003 and newer, the problem was corrected......

I have a 2000 2500 with 6.0ltr and I have piston slap. The truck has 120,000 kms. It seems to have gottin worse since changing over to synthetic oil. I bought the truck used with an extended warranty so I will be getting a compression check before the warranty runs out. I will start the motor for about a minute before driving as I don't like excelerating when the motor is knocking. It seems if you give it a chance to warm up there is less knocking. Other than that the engine runs good. Doesn't burn oil and power is good. gets about 18mpg and 11mpg pulling the rv.


DPatrick... your problem is typical GM piston slap. the piston is loose in the bore (to simplify) and makes noise when cold. when the piston and cylinder heat up, they expand, making it a tighter fit, and quieter.

changing to synthetic oil will make it worse, since although synthetic protects better, it's thinner by nature. oil packed under your rings helps quiet the piston in the cylinder. make the oil thinner, and you allow the piston to "pivot" more in the cylinder, making the noise worse.....

reports are conflicting as to whether or not the problem will cause long term damage or not....... i had a chrysler that i drove (318 cid) for 173, 000 miles with piston slap, and it never became anything more than annoying.....

any 2004's out there with piston slap evident??

that $3500 cash back right now looks good but not if the piston slap is still around.

juma
Yes I have a 98 with a brand new motor and I have piston slap.

Yes I have a 98 with a brand new motor and I have piston slap.
if new, check production date on engine.

if reman, they're rebuilt by independant shops, contracted by GM.............not by the factory........

....... warranty?????

if new, check production date on engine.

if reman, they're rebuilt by independant shops, contracted by GM.............not by the factory........

....... warranty?????
It is brand new not reman. I don't believe if you go to Chevy deler you can even by a reman from them only ford and others but not chevy if you want a reman chevy motor you have to go else where to get it. Chevy don't want the headachs. They told me it is easier for them to sell them new.

It is brand new not reman. I don't believe if you go to Chevy deler you can even by a reman from them only ford and others but not chevy if you want a reman chevy motor you have to go else where to get it. Chevy don't want the headachs. They told me it is easier for them to sell them new.
Chevy dealer told me its fine it will not come apart or anything.

Chevy dealer told me its fine it will not come apart or anything.


of course they did!!!! admitting the motor was improperly made, with pistons that are too small for the bores would be admitting fault....

typical dealer response....... :biggrin:

good luck, dude.

of course they did!!!! admitting the motor was improperly made, with pistons that are too small for the bores would be admitting fault....

typical dealer response....... :biggrin:

good luck, dude.
Yep your most likely right :)

I have a 2003 1500HD 4X4 with the 6.0L at about 12,000 miles. I have had piston slap on this engine since I bought it 15 months ago. It seems as though it's gotten a little worse lately as the summer has come in for some reason. I don't think they fixed it for 2003 engines.

Ya I don't think there is anything to worry about on all these piston slaps. They will last a long time.

Ya I don't think there is anything to worry about on all these piston slaps. They will last a long time.


Piston slap??? What's a piston??? (LOL)

If you use a thin oil ( I DO) like a Synthetic mobil 1 5W you might hear a little ticking like I had on mine @ 9000mi.. All I did was change to a heavier Synthetic 10W 30and that fixed the noise, now @ 12000mi. its nice and quiet. I had a bottle of Synthetic MOBIL 1 10W 30,Synthetic MOBIL 1 5W 30, and cheap 5W 30 and it was -20 F, I tried to pour them out and the cheap stuff was like heavy honey and gouped out, both the Synthetic oils were the same as if it was 70 degrees out, just came right out like liquid was supposed to. I think the ticking comes from the space between the piston skirt and the cilinder wall, the this Synthetic oils leave a lot of space, where as a thicker oil keeps the space like a dampner. But as far as the "Piston Slap" goes, Never heard it, and will cry if I do. So good luck with everything.

I have a 2000 chevy 2500 which has the "piston slap" but the engine runs great with 70,000 miles uses no oil and pulls a 5th wheel with no problem. So I don't think the slap is a big deal stop sweating the small stuff and just enjoy your truck :smile:

I thought the same thing for a while. My 01 6.0 2500hd started using a little oil and the oil was getting dark very quickly after oil changes. At 60k the slap was getting so bad that I was getting quite concerned. I took it to my dealer and now it has an 05' 6.0 engine in it. All of the cylinders had gone out of round.

Tell me that piston slap doesn't cause a problem...