Re: '55 engine back to life! Mostly worked...

Posted by Bob E. On 2018/8/24 8:53:30

Pulled pistons 1 & 2. Photos below. Certainly signs of wear esp since total time on the engine is probably just over an hour. But oil everywhere, maybe just not enough. I did pull brass plug adjacent to where oil pressure sensor goes and cleaned with a brush down to oil pump (and vice versa). I haven't seen anything besides oil. Ditto with the Melling pump. Took the cover off and it is very clean in there. Bought a new Melling inlet tube & screen.

While there is wear on the pistons, I am thinking it is not significant enough to do anything about it and time to put all this back together.

Maybe my noise is attributed to low oil on some part and an unclogged pump screen will address that. I am still stumped as to why the front 4 cylinders were carbon coated and the back 4 are still shiny metal.
My plan now is:
-Clean lifter bores really good (4 not rotating)
-Reinstall the 2 pistons I removed, as is.
-Reinstall heads.
-Check lifter pre-load from pusher rod
-Double the middle exhaust manifold to head gasket (both sides show leaks: wet black streaks on engine just below)
-See what changes with full oil flow.

I added a .zip file here with the audio of this pesky noise. Please let me know if you recognize it (it is at camshaft frequency)

thx

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