The original aluminum head plug in the TR4A engine in my TR3 failed and let water leak into the oil. What a mess! With the help of some Triumph club members we got the remnants of the old aluminum plug out (what was left of it) and cleaned the threads in the head. I have bought a new aluminum plug from Moss, however, since I have always heard that it is not good to use aluminum and iron together (dissimilar metals), I have fabricated an iron plug from a 1 inch diameter bolt with SAE 14 threads per inch, per what Moss Tech Support told me is the correct thread for that top plug.
I have two questions:
1) Is it best to use my fabricated iron plug, or the original type aluminum plug? See attached picture of fabricated one.
2) What sealer should I put on the threads of the plug? ( I was thinking of using Permatex Aviation sealant, but not sure that is the best)
Thanks for the help!
Bob
I have two questions:
1) Is it best to use my fabricated iron plug, or the original type aluminum plug? See attached picture of fabricated one.
2) What sealer should I put on the threads of the plug? ( I was thinking of using Permatex Aviation sealant, but not sure that is the best)
Thanks for the help!
Bob