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Chevy V8 Engine Slap
I have a 2002 with the 4.8 in it. When it was new, If i started it on a cold day and went up my hill it rapped very very little. I usually warm it up but I am a firefighter here in town and when we gat a call I just fire it up and roll. I hammer the hell out of this truck and it now has 90,000 on it. I plow with it, trailer with it and just plain and simple use the heck out of it. Nothing has been in it since 1,500 miles but Mobil 1 5/30.
I have a good friend at a Chevy dealer. He told me to complain about 3 times of the engine noise. The dealer made me leave it over night and they heard it and rated it a 2 on a scale of 10. My buddy told me to call GM customer Care and complain, I did and they gave me a FREE 100,000 mile warranty on my engine! I have it in print if anyone needs a fax.
The piston noise is actually caused from the pistons being very short with hardly any skirt on them for fuel economy. They are sliotted pistons and they need to heat up and expand. This is the 4.8, 5.3 and 6.0- all 3.
I have the same clunk from new in my tranny but 90K and it hasn't broke yet.
I wouldn't worry about the noise as long as it's not too bad. Be sure that if you buy one you pull the stick to see if it's low on oil. I go around 4k on a change and do not use a single drop at 90,000 miles. Also, if it's a private owner, ask them to see it on a cold morning, feel the manifolds to be sure they didn't warm it up and you will see if it's a 2 out of 10 or a 9 out of 10.
Hope this helps...90k and it runs like new. I went to change the plugs last week and took the 1st one out and it was soo good I put it back in! Great engine IMHO.
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Chevy V8 Engine Slap
It's all in the dealer and how hard they work for you. I had several minor problems w/ my silverado and they helped me through all of them. The heated mirrors broke 2 times. onec at about 10K then at 75K. They replaced them free at 75K for me.
The A/C was a little problematic too. They went the extra mile and found a service bulitin from an Escalade with the same problem. On idle for a little while, the condensor will get too hot and shut the compressor off. The bulitin called for the instalation of this big GM electric fan. At first I was a little upset I needed this big fat loud fan everytime my compresser kicked on but my A/C is colder than cold. The benefit of this fan is that I plow so i keep the defroster on when the plow is on and the fan keeps my radiator nice and cool.
I think it all depends on the dealer and if it was a good employee or disgruntled UAW guy angry with the world who built your engine.
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