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So my 5.3 has a knocking sound, could it be the cam, lifters and push rods? Any local shops in SA that wont charge an arm and a leg to get this fixed? The seller is giving me the run around and i just want to get my 84 on the road!
http://www.youtube.com/watch?v=7XmhZANIFug
Can you get a stethoscope to pinpoint where the knock is coming from (you can get one from Harbor Freight for cheap)? If not, maybe a long handled screwdriver?
I guess that will be my next purchase. I also took the valve covers of and the one on the driver side had marks from the rockers. Those sections weren't really stained by the oil.
sounds like a lifter problem to me!!
That fan looks safe
My bet is on a lifter.
AgreedQuote:
Originally Posted by dropem
I was told to use mystery oil and use the truck for a couple of days and see if that helps the lifters. What do you guys think?
I think that you would only be hiding the problem from yourself for a little while by putting the equivalent of oily molasses into your engine, that stuff isn't a fix for the problem it's a cover up kinda like putting red tape on a busted out taillight
You said the rockers are hitting the valve covers. Are they aftermarket? That could be your sound. Check and make sure they are tight. Rockers shouldn't be touching the valve cover.
No, its the stock covers. I removed the covers one at a time and checked the rods and tightened the rockers back to 22. When I started the truck with either cover off you couldn't hear the knocking. Seems likes its echoing off the covers.
Quote:
Originally Posted by gagliano7
When you say tightened back....were the rockers loose? If so I would be willing to bet that was your problem.Quote:
Originally Posted by coyotes33
No, I took them off to check the rods.Quote:
Originally Posted by bangbangskeetskeet
Fresh oil in there?? Or any oil at all?
Change the oil, my 4.8 has 400K+ on it and right around 4-4500 miles my motor make funky noises. I put in some fresh juice and a new filter and it runs like a top for another 4-4.5K miles with no sounds at all.
.................PS: Put some hose clamps on the heater core lines coming off of the water pump
Sure doesQuote:
Originally Posted by MrHorsepowerLSx
Does it have cats?
At the moment just manifolds.Quote:
Originally Posted by skinny chicken