454 Knocking - Top End??
#12
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I bought the boat with this engine on the basis of a survey that said it ran well, and the owner having spent ~ $5k having the top end rebuilt (skimmed & valve seats). Clearly the last owner has fancied himself an engine builder - the heads are not original casting#6272292, and the cam has been swapped at some point. I would say based on my teardown that the lifters were also replaced when the heads were refreshed, they look brand new.
Afraid I have no records to say where they came from.
Thanks
Will
Afraid I have no records to say where they came from.
Thanks
Will
#13
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Joined: Oct 2005
Posts: 1,077
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From: Waldorf, Md
Hi All,
Just an update on this - after the leaving the boat alone for a week whilst I sourced gaskets, oil had drained back to sump and slivers of copper clearly visible in heads and v of engine.
Likely thrust bearing or a very worn big end I am told. Looks like the engine is coming out.
This happened on the first trip out after changing the oil filter ~ just coincidence or something I did wrong here?
Thanks
Will
Just an update on this - after the leaving the boat alone for a week whilst I sourced gaskets, oil had drained back to sump and slivers of copper clearly visible in heads and v of engine.
Likely thrust bearing or a very worn big end I am told. Looks like the engine is coming out.
This happened on the first trip out after changing the oil filter ~ just coincidence or something I did wrong here?
Thanks
Will
#14
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So I guess it would be worth running it at least now I have rebuilt the valve train - I pulled all the lifters, cleaned them and set the lash, then saw the copper and figured an immediate write off..
#15
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Joined: Oct 2005
Posts: 1,077
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From: Waldorf, Md
oh man the plot thickens .. I was about to pull the trigger on a rebuild.
So I guess it would be worth running it at least now I have rebuilt the valve train - I pulled all the lifters, cleaned them and set the lash, then saw the copper and figured an immediate write off..
So I guess it would be worth running it at least now I have rebuilt the valve train - I pulled all the lifters, cleaned them and set the lash, then saw the copper and figured an immediate write off..



