Noisy Motor

mxxxz · March 31, 2010

I have the so called piston slap, its so loud that when i pull away from a lot ,everybody looks , It gets a little quieter after warm up but its still very noticeable . Is this normal for 5.3

jro909 · March 31, 2010

yep, run good oil and an ac delco filter...mine was really noisey until i began running mobil one for 3k changes and the only thing that makes noise nice is just the sound of the fan spinning...thats with 104k on it

Nytemare · March 31, 2010

I have the so called piston slap, its so loud that when i pull away from a lot ,everybody looks , It gets a little quieter after warm up but its still very noticeable . Is this normal for 5.3

Dude...that doesnt sound like Piston slap....it usually goes away within 2-3 min of start up.

What your describing sounds much more like rod knock...which is really bad news....Take it to a really really good shop and have them have a listen to it.

gmtech4 · April 1, 2010

Aiden,I had a 3.1 in my '91 Beretta GT and it had the infamous piston slap and when I finally wanted to fix it ,the slap lasted all day long lmao,so I didn't do it ,i sold it to a guy for his daughter and right after she got her licence ,she got side swiped and they wrote the car off !!!! 125 k on the clock in'08 piss me off,lol

mxxxz · April 1, 2010

thats what i was thinking , it has been getting louder ,an have only had it a month

I have the so called piston slap, its so loud that when i pull away from a lot ,everybody looks , It gets a little quieter after warm up but its still very noticeable . Is this normal for 5.3

Dude...that doesnt sound like Piston slap....it usually goes away within 2-3 min of start up.

What your describing sounds much more like rod knock...which is really bad news....Take it to a really really good shop and have them have a listen to it.

tomtigersIII · April 1, 2010

I am not sure what the piston slap is, but was hoping you all could help. When I start my truck in the morning and dont let it warm up at all, but start to drive I hear a knocking noise. I was trying to find out if anyone might have known what it is and if there is anything to do about it?

thats what i was thinking , it has been getting louder ,an have only had it a month

I have the so called piston slap, its so loud that when i pull away from a lot ,everybody looks , It gets a little quieter after warm up but its still very noticeable . Is this normal for 5.3

Dude...that doesnt sound like Piston slap....it usually goes away within 2-3 min of start up.

What your describing sounds much more like rod knock...which is really bad news....Take it to a really really good shop and have them have a listen to it.

Nytemare · April 1, 2010

Aiden,I had a 3.1 in my '91 Beretta GT and it had the infamous piston slap and when I finally wanted to fix it ,the slap lasted all day long lmao,so I didn't do it ,i sold it to a guy for his daughter and right after she got her licence ,she got side swiped and they wrote the car off !!!! 125 k on the clock in'08 piss me off,lol

Yeah, I have heard some people with the slap all day long, but it was never head turning loud. More like dead lifter sound.

mxxxz · April 2, 2010

Truck goes in the local dealership on Tuesday ,next week .

have wait see what the outcome is

ZBrink · April 8, 2010

Did you find anything out?

Truck goes in the local dealership on Tuesday ,next week .
have wait see what the outcome is

mxxxz · April 10, 2010

Never got much help from the dealer , Unless you believe in a motor job in a bottle ....lol

They changed the oil an added some type of GM additive , They clain the motor will never hurt making the noise , but each day its getting worse . I guess i will have to swap in a engine ,either a used unit or new replacement .

Anybody got any sugestions on were to find a good 5.3?

gmtech4 · April 10, 2010

sell it,drive it ,just don't freak out stephen,its ok

jro909 · April 10, 2010

Never got much help from the dealer , Unless you believe in a motor job in a bottle ....lol
They changed the oil an added some type of GM additive , They clain the motor will never hurt making the noise , but each day its getting worse . I guess i will have to swap in a engine ,either a used unit or new replacement .

Anybody got any sugestions on were to find a good 5.3?

drive it into the country, light it on fire..collect insurance and then get a denali

Nytemare · April 10, 2010

Never got much help from the dealer , Unless you believe in a motor job in a bottle ....lol
They changed the oil an added some type of GM additive , They clain the motor will never hurt making the noise , but each day its getting worse . I guess i will have to swap in a engine ,either a used unit or new replacement .

Anybody got any sugestions on were to find a good 5.3?

Let the additive have some time to work. It was probably EOS.

Give it about 1000 miles and see if the noise starts to subside. You probably have a collapsed lifter or a few. If that doesn't work, toss a bottle of ATF in the oil about 500Miles before the next oil change, that will clean out all the oil passages, and your probably getting the noise due to a blockage somewhere.

If you had some real bad issue like a rod knock or something of that nature, the techs would have told you you needed a rebuild.

mxxxz · April 11, 2010

Think thats what i will do, If was serious like a rod or something, would have not lasted this long .maybe i need a good sounding exhaust keepmy mind off the noise ...lol