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  #71  
Old 04-10-2019, 08:12 AM
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Join Date: Oct 2018
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Oldmactech is on a distinguished road
Let me first say how grateful I am to you guys for the help and encouragement as I thrash my way through this. Thank you very much.

So last PM I put my endoscope camera in a looked at the chain and see nothing out of the ordinary. Multiple magnet jabs came up dry and if I hand feed the chain it rolls just fine forwards and backwards. I’m still missing my tensioner pin but I never had the “oh crap, I dropped the pin in the chain moment”,-don’t think it’s in there.

Currently, all the timing gears are off. I stuck a wood dowel in the cylinders and gently rotated the crank bank and forth to the stopping points. If I recall -it was late- cylinders 2 and five were up. In the quiet of the night I could hear an audible “thunk” at the end of the travel, can’t tell from where yet but seems likely one or more of the valves is hitting a cylinder.

I won’t have much time on it today - beautiful day too. But I will look at which lobes are down and maybe take a picture or two.

Thanks again,





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  #72  
Old 04-10-2019, 11:38 AM
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Progress.....of sorts.

Don’t have much time today but I rotated the intake cam by hand and watched the lifters move and they all seemed functional. I removed the intake cam and looked for anything that might be odd and lifter no 9 can be depressed 1/4” by hand. Squishy seems an appropriate description. Nothing else. Should I replace the lifter or is it just not full of oil?

Hand cranked crankshaft still only 15degrees more/less.

Did the same for the exhaust cam. Nothing out of place, no “squishy” lifters.

Pulled the exhaust cam. I used the place 3 and 5 lobes opposing each other to remove the tension. Oddly, after removing the tension the rear most cap still had some tension even with the lobe way off the lifter. Hmm.

The moment of truth I rotated the crankshaft by hand. EZ 360.

So, good news, the timing chain isn’t the problem. The pistons and rods are likely ok. And, when I took the tension off the cam whatever was apparently impeding the pistons retracted.

My working theory is the exhaust cam was seated incorrectly or might even need replacing. Logically when I first did the timing, it did a full 360 when cranked by hand but the exhaust cam lagged a few degrees behind the inlet. I bet #6 piston ran into a valve. I may pull the exhaust cam tray and see what that tells me but the magnet trick doesn’t work well for me....

She ain’t dead yet. Now if some Masters tickets fall out of a tree, I’m good.







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