I think I broke my epoxy...

[CobraSix]

Well...I think my luck ran out on the cotronics epoxy. No, don't fret...

I noticed the other day that I started getting a very audible metal on metal rattling. Not an exhaust leak ticking...but a rattle coming from the exhaust headers. I did everything external, adjusting valves, re-torqueing bolts, etc. Still there. Started to think about the port divider. That that is my problem. But I started to wonder why my Aussie head failed while my US head worked great. Then I remembered the Aussie head didn't have the www groves. So, I had to rely on the epoxy to fill in the groves. I think that might have lead to the failure on the Aussie head, but not on the US head that had the grooves.

I think the engine vibration is too much for the epoxy when there isn't enough interference fit to help hold it in place. Make any sense?

So tomorrow, I'm going to drill out the holes on top of the aussie head and use the allen bolts to tighten the port divider into place.

Slade

 

[Anonymous]

would it be alright to grind grooves into the area thats supposed to have them???

 

[Anonymous]

i doubt that the port divider is physically tall enough to be able to do that, but if there is some excess height it could work, at least give it some stability

 

[Anonymous]

slade don't forget to stake the threads after you bottem the allen screws or they wil back out. Mine did