What size tap for header bolt hole??
What size tap for header bolt hole?? I have one header bolt hole that has the first few threads screwed up 
. I have not cross-threaded a bolt; rather I bought a bolt from the local Pontiac dealer; and it was a different size than the stock one. I called the parts department, and they faxed me a diagram that said it was the right bolt. I tried it, and it went in less than 1/4 inch and then angled. I want to try and re-tap it without removing the head so I can use a new bolt. What size tap do I need??
Thanks
. I have not cross-threaded a bolt; rather I bought a bolt from the local Pontiac dealer; and it was a different size than the stock one. I called the parts department, and they faxed me a diagram that said it was the right bolt. I tried it, and it went in less than 1/4 inch and then angled. I want to try and re-tap it without removing the head so I can use a new bolt. What size tap do I need??Thanks
