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| Joined: | 04-07-2022 |
| Location: | Oregon USA |
| Posts: | 108 |
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The impossible has happened. No, I didn't get a date with Heidi Klum. =:-(
I got my engine back from the machine shop before Christ returned. Yes, it's true. Saints be praised.
I started assembling my pistons (Carrillo BTW, nice stuff) and happened to spend a minute staring at my head as I contemplated the parts I have yet to acquire. I noticed something interesting. The machinist had found a crack in the cooling jacket after skimming the head. He sent it out to be heliarc welded, and finished the work. I have pointed out the repair in the picture.
Notice anything? The combustion chambers nearest the crack are pitted, the chamber furthest away is pristine with no pits. Apparently the car was driven for a while with coolant leaking into the chambers. The combustion process turns the water into superheated steam which is very corrosive to aluminum - hence the pitting. You also get white smoke coming out the tailpipe which is a dead giveaway you have lost the head gasket. Apparently this was ignored and the car was used until it would no longer run.
I also have reason to believe that the motor lost a cam belt at some point, as four of the valves were bent - but still doing their job well enough to continue to drive the car. My suspicion is that the valves bent the most were replaced, and the valves that merely "kissed" their respective piston were ignored. <sigh>
I will give another update when I make some real progress assembling the engine.
Cheers,
Vance
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Last edited on 06-29-2025 10:33 pm by vnavaret