Posted by Gary Mitchell on November 12, 2014 at 07:19:08 from (72.161.222.34):
In Reply to: 53 sa engine posted by rray on November 12, 2014 at 06:44:25:
Rich, you'll no doubt get a variety of opinions/responses. Mine is this: If I were just going to keep the SA around as a keep-sake and maybe parade tractor I wouldn't spend a load on it. What I would do is take the valves out of the head while keeping them in order, to return them to the seat they came from. I would clean them and all ports on the head as well as I could by hand. I would then lap the valves by hand to their respective "homes." If they appear to be seating I'd clean them up good and replace them in the head, lubing the mating surface with a light oil at this time.
This wouldn't be a bad time to place the head, level and face up on the bench and pour some diesel fuel into each compression chamber on the head as a test. I consider that if no or very little fuel seeps out in 15 minutes it would suit the purpose of putting around without being concerned about valve failure.
When I replace heads on old tractors I use Copper Coat in the spray can, per directions on the can.
I've never been sure head gaskets needed any help in sealing but for some reason an inner voice made me use something. I have used aluminum spray paint when I didn't have anything else.
I hope that helps or at least gives you something to think about. gm
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