Intake Manifold

[Scrubcadet10]

Have no idea if this is correct or not

 

[djg618]

Remember that when you put a bolt through there, it may push more metal particles into the combustion chamber. Also, if you can get to the rim of the hole with a rat tail file and chamfer it round, it will reduce stress and future carbon buildup. What I would worry about is, will combustion pressure pop the bolt out? I don't know what the pressure is at TDC, or how much a helicoil can hold, but that hole looks to be nearly at TDC. What's the diameter of the bolt?

The bolt is 1/4" x 20. So it would be advisable to plug this hole??

And yes, I was going to completely clean/flush out the newly threaded hole with a syringe of hexane forced through the hole from the inside.

 

[Richard Milhous]

What is the depth of the entire bolt hole? 20 mm?

 

[djg618]

What is the depth of the entire bolt hole? 20 mm?

Don't know. I'll measure the bolt and hole tomorrow.

 

[djg618]

The bolt is 1/2" long and the tapped hole (1/4") is approximately 5/8" deep using a depth micrometer. The overall thickness of the metal is approximately 1-1/4". I'm not even sure the pilot hole is 1/16".

Anyway, I deburred the hole and cleaned the inside of the cylinder and I got all the crud out of the threaded hole. I'm in the process of putting everything back together.

 

[Scrubcadet10]

Good luck is all i can think to say, lol.