Not only were all the screws frozen on the oil pump (impact driver knocked them out easily), but then it was hard as hell getting the halves apart.
Actually damaged the metal hammering it apart with a screwdriver, but I didn't have much choice.
These three screws holding the cam assembly turned out to be the toughest frozen screws ever. Mainly because the screws were such soft metal that they wanted to tear apart at the slightest turn. Plus, I couldn't really get the Dremel cutting wheel square on any of them, so they all had to be cut at a weird slanted angle. I was almost positive I'd have to resort to other means to beyond the Dremel/Lisle to get them free, but this was the first lucky break when the impact driver knocked them all loose (though it took an unusual 4-5 hard blows).
Switched over to working on the crappier of the 2 spare heads. I plan to media blast one of them, sacrificing it for the benefit of the "model engine". It turned out to be in really horrible condition anyway, and probably not something I'd ever want to risk running in a working engine.
First time using the tweezers to pull the keepers. Worked pretty well, but the buggers are still pretty tricky to yank out.
Then discovered that the intake valve was absolutely frozen into place. It wouldn't budge a millimeter.
Used the alternator puller like a punch to hammer it down. But even then, it was taking heavy blows just to get it to move. It was chock full of rust-colored powder.
Luckily, the exhaust valve came out without too much fuss.
Which was a good thing because I had to use the exhaust valve to punch out the intake! (pretty clever idea if I do say so myself)
Finally out! That was another lucky break.
Major corrosion.
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