I'm pressure testing my IM/TB, and sure thing, the TB is leaking from the butterfly shaft ends. There's an o-ring and bearing at work here. I've replaced the o-ring and still leaks. : ( Any one else have this issue or a remedy? I called MP today, and they said its normal, which I can understand, but I'm still questioning it because they didn't know what o-ring size I needed..

you can always trust a dishonest man to be dishonest, honestly, its the honest ones you need to look out for. you never know when they will do something..stupid

Apparently I need to source a better bearing. Ill try that and see if it helps.

you can always trust a dishonest man to be dishonest, honestly, its the honest ones you need to look out for. you never know when they will do something..stupid

Keep us posted on the progress, this will be good information down the road for MP60mmTB users.

I contributed to the Wiki.

I will be fixing mine this weekend. If i remember i will do a small how to.

97 Eclipse GS, 2.2 stroker,Gt35R,MSNS,E85 @20psi. 450hp 370tq..With issues

I had this problem on my Jeep 60mm throttle body. I dont know about the MP throttle body's but on the jeep tb there is a little slit on the edge where the o-ring goes around the tps. that little slit causes it to leak, so what i did was JB Weld the gap.

i replaced the bearings and added neoprene washers. i had to space the bearing out slighly, but now it holds air, so much that it busted my IM gasket lol. 40 psi too much? lol

you can always trust a dishonest man to be dishonest, honestly, its the honest ones you need to look out for. you never know when they will do something..stupid