I would try a thread chaser first to try and clean it up a bit, this might do the trick. Search for it on www.McMaster.com . It would be best if you can get a picture of the thread condition using a digital camera with its Macro setting on. If your saying your pulling chips out every time you try to get the bolt back it then I don't feel very positive about it.

As for taps, use the one with the more shallow taper, also known as a gun tap. With the bottoming tap, you will start engaging the damage threads right away. I'm hoping the gun tap will engage the threads that are past the damage area. You will also find a better selection of taps on Mcmaster.com. If in doubt seek the help of a experience machinist, and most of all be patient, you already have.

 

thanks for the advise , www.McMaster.com does not have the tap i need ( 8mx.75 ) .... Amazon.com does... so the one that i need is the plug tap.

THIS IS the one i ordered from Amazon.com

 

Good luck with everything and be sure to use some Tap Magic or other type of tapping fluid. If you break the tap in the block, then I can imagine your going to be $hit out of luck.

 

UPDATE: so i finally got the tap, the hole was re-tap, and i tested the hole with the old bolt. ( i didn't put the OEM torque spec, it was hand tie) tomorrow i will clean the hole, and try the new oil jet bolt with the OEM torque specs... i'm 95% sure is going to work..

THanks a lot for all the help =)

by the way , where can i buy this?




I Will update on this tomorrow =)