I did the CCV mod way back and have a 1/2" brass plug in the hole in the intake piping where the CC vented into the intake....well its been working fine but want a little more re-assurance. So I was looking on the Mcmaster-Carr website and they have flanged plugs that are rated for 140 degrees max temp. Would you guy's trust these in this area of the engine?


Here is a link:

McMaster-Carr

 

Watching my IAT temps after I shutdown the engine I have seen as high as 155 degrees F.

 

A PVC pipe cap works well in that hole and if you get the kind that's "rated for boiling water" then you won't have a problem. You can retain the plug with gray silicone and a thin hose clamp and it won't ever get enough pressure to come out.

 

I used a grey barbed plug from the parts store and a zip tie, 2 years and no problem.