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lastnight while startin my truck to come home......i fired up and heard a clunkin...after bout 10secs it went away...i figured that the oil hadnt reached the head yet...checked the oil this morning and it was a lil low...but not majorly low...am in that realm?.....
Piston slap?
These engines are all notorious for developing a lazy lifter. For some reason they don't pump up right away. Is that what you're hearing?
thats where it sounds like its coming from....if i turn the truck off and staret while still hot or warm it wont do it....this morning it didnt do it...but ive heard it in the past...just was wonderin is all...didnt wanna destroy my engine...Quote:
Originally Posted by motorholmes
thank you
trevor
mine does the same thing, only when its cold tho....whats a easy fix?
Its piston slap....just drive it.
mine does it too, though when it first starts its nice and quiet for about 30 seconds, then it starts knockin
i have the same problem, starts fine, knocks for a few moments and than stops.
knocking i'm fine with, its the clack clack bang, and finally the broken rod taking out my oil pan then tire and sending me into a ditch.. thats the part i worry about
that would not be good. but would be a good reason for some upgrades.
piston slap? something to be worried bout?...i know what it is and all but doesnt sound to good....should i be worried?
trevor
If you have piston slap you should be able to tell by the oil consumption. If your truck doesn't use any oil between changes, your problem may be a lifter not pumping up. If it does have piston slap, just don't drive it hard until it goes away. The piston warms up and expands to fit the bore. My vortec suburban has had this for 4 years and no trouble yet (140k). I drive it pretty hard on occasion towing and stuff.
I had this with the 5.3 that I removed with 90k. I should tear it down and mic the bores just to see what the tolerances are. I just assumed it was a lifter, but I have been wrong before... :duh:
These motors do use oil thought too.
Something about vaporizing and being sucked in through the intake......Pretty sure there was a post on it.
If it ain't broke don't fix it. :lol: