hihok9

I was just ready to drill, tap and plug the coolant port to the TB on my plenum when I saw a thread picturing it done on the injector housing side. Was this done with the injector housing in place? Can I be pointed in the right place to read an article? Thanks!

Paul Workman

Yes, it can be done w/ the IH in place. I placed the vacuum hose right next to the drill bit as I punched out the hole and when I tapped it to suck up any chips. The plugs work like a champ, and cuts a plenum pull down by about an hour that is used fussing with draining and then refilling the coolant and getting the air out of the system.

Not a real good picture, but you can see the brass plug on the left. I wrapped it with Teflon tape before installing it. Someone said it should be aluminum instead of brass to eliminate electrolysis issues. Well, it's been 3 years and no problems yet. But, at some point I may put an aluminum set in there, when I have the plenum off again for any reason.



So far just fine tho. It is a good modification, IMO.

P.

ccmano

Mine is done that way... here's a thread on it.
H


http://www.zr1.net/forum/showthread....m+coolant+plug