nasty knock
3.0L making a knock from the top left side(facing truck). ran amsoil flush and the knock wasnt as loud but still there, hydrolic lifter possibly?... any suggestions before i pull off the intake manifold so i can get to the valve cover to check
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Are you sure that it is coming from the "top" on the passenger ["left side(facing truck)"] side? As this is a common occurrence for the bottom driver's side, i.e., rod bearing.
If so, then I would have to say that it is the lifter and it needs to be reshimmed and/or tightened, both of which you can "search" here for info on. |
yeah, im possitive its coming form up there, thanks for the advice
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they aint no hydraulic lifter in no 3.0!
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Nah, there's not. But if you point in the right direction, they can usually sort it out for themselves, 3yotys. :great:
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you sure there arent hydraulic lifters? when i was trying to figure it out before i came here i was told it could be a collapsed hydraulic lifter...by a friend who happens to be a mechanic at a local toyota dealership
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The valve lifter, or hydraulic lifter (although it's operation is purely mechanical), or even camshaft follower, is basically a little cup that sits atop the valve, with a shim of varying thicknesses on top of it that acts as a spacer for the cam's lobe to ride on.
Normally the lifter itself does'nt "collapse", instead, the shim becomes worn and needs to be replaced with a new one of proper thickness, which is determined with a feeler gauge and some plasti-guage. It is also common for a spring to have "collapsed" or broken, but your problem is probally just that the shims need to be adjusted, a "scheduled maintenance" item suggested to be performed every 60,000 mis., or every 2 yrs., whichever comes first, which will definitely cause a "loud knocking" at the top of your engine. Just a little clarification to avoid confusion, so ask your "mechanic...friend" about this and let's know what he comes up with. :great: |
alright, thanks alot man
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No prob, and good luck with what you find out. :great:
Reshimming is the easiest and cheapest route, something you can do yourself, whereas a valve job would start to get a bit more involved and costly as it is common practice to do them all if you have to do one... so best wishes. :bigok: |
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