Cylinder head bolt holes that have broken into the intake port due to porting or CNC. Any pros and cons about inserting a brass tube into the head bolt hole to prevent vacuum leaks or oil into the port. I have installed the tubes in the past, but wonder if it is really necessary in a NA application.This message has been edited. Last edited by: Bruce Williams,
Bruce Lee
Experience is what you get when you don't get what you want.
November 19, 2018, 06:29 PM
rusty
not an expert but suggestion is go ahead and do it.have seen them pull oil.
honesty is the best policy,insanity is a better deffense 1.036, 6.16@ 224
November 19, 2018, 06:58 PM
Bruce Williams
Thanks Rusty. Depending on how well the head bolt washer seals against the head would determine if oil can seep past and port vacuum suck it into the engine.
Bruce Lee
Experience is what you get when you don't get what you want.
November 19, 2018, 08:40 PM
rusty
bruce i am sure some run without the tubes ,i have also.you just have a lot better chance with tubes.good luck
honesty is the best policy,insanity is a better deffense 1.036, 6.16@ 224
November 19, 2018, 09:31 PM
Bucky
I thought I read a post at one time from Chad Speier where he said that he usually doesn't use them and it isn't a problem.
