Stripped Drain Plug

[Yamifj1200]

"I haven't had great luck with the small Helicoils in the aluminum Miata head where all my valve cover bolts seem to be halfway stripped.  I'm pretty sure my engine builder sent me a different ported head rather than porting mine, and whoever had this cylinder head before"


Bill, I had a similar situation a few years ago with a motorcycle head. The shop insisted it was the head I sent him untill I showed him pictures of the center punch marks I hade made on the cooling fins at the back of the head. I have always marked parts I sent out for machine work to make sure I get the same parts back...  Just a thought for the future....

Eric M

[racerrad8]

You guys just kept on about the stripped oil pan and low & behold my son tells me about 30minutes ago;

"I tried to tighten the drain plug because it had a drip hanging from it, and it just turns..."

So, I just R&R'ed the pan and successfully installed my countless Heli-Coil. It took longer to get the gasket off that it did to remove and Heli-Coil it.

Now my son says; "I have never been able to get it to fell that tight before"

A Heli-Coil done properly will outlast the part(s) they were installed in...

Randy - RPM