|03-31-2012 10:12 PM|
If there is room to work in the engine bay you should be able to re-tap the existing hole for a NPT threaded bushing. It all depends on what size of hole that is in the head now as to what size you need to tap. A 3/8" NPT requires a 9/16" hole, a 1/2" NPT requires a 45/64 hole.
Most straight threaded plugs use an O-Ring for sealing and without a machined surface around the hole, it will not seal. The AN type fittings are straight but then again, they need a machined surface to seal against. Your best and fastest solution is to tap the existing hole in the head to NPT even if you have to drill it out to the next larger size. Someone else may have a better solution so stay tuned for more.
|03-31-2012 08:30 PM|
|fourty6hotrod||S10 racer, can this be done with the head on the engine? Also is there a plug i could get with straight cut threads so I could block off the hole?|
|03-31-2012 08:15 PM|
|03-31-2012 06:40 PM|
Temp sensor bushing for 1955 Chevy 235 cid?
I bought new Auto Meter guages and went to put the temp sensor bushing in and it won't screw into the head. The bushing is 3/8" for an electric guage. The engine came out of a 1955 Bel Air and from the research I did it came with a mechanical temp guage. I don't know if the mechanical bushing had different threads than the electric? I've went to the auto store and hardware stores looking at different bushings and nothing will fit. Hopefully someone can help me because I have no Idea what to do next ???
Thanks for any help,