Throttle body air leak...Pics inside with how to fix!!!
I used the Machv seals they work good no leaks tested up to 30psi might also want to check on the back side mine leaked around the ics and this cap that had like a hex fitting cover on it it has a o ring so i just replaced it and put a little ultra grey rtv on it hasnt leaked since
EvoM Guru
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From: Tri-Cities, WA // Portland, OR
Yes, its necessary because the shaft has to be removed to replace the seals. Its not hard to remove the screws. Just be sure that you are using a good phillips head screwdrive that fits the screws.
Last edited by mrfred; Mar 7, 2010 at 02:24 PM.
Got my Milspec seals the other day (Thanks Aby) and installed this afternoon. Took maybe 45min tops. Really easy boost leak fix. Write up is on point. If you dont have the spring pliers and are good with small picks you can get it off that way.
I changed the seals and cleaned the throttle body - pretty easy job. Now I seem to have a high idle. Car revs to 1300 and tapers and goes back to 1300 or so. Didn't have that before I did the seals.
tighten the BISS screw on the throttle body until your idle goes where ecuflash says it should be idling at. You might want to enable the SAS Actuator in evoscan when adjusting it.
I did this today and Idk if it's been mentioned but, I did not remove the tps wiring harness like he did in the write up. I just unbolted the TB first, then unscrewed the tps with it still attached. It was much easier b/c I didn't have a clue as to how to get that metal clip off and no screwdriver I had would get under it.
This is actually quite an easy job. I thought it would be much harder. The coolant lines are probably the hardest part. I had a lot of trouble getting the shaft seal out near the tps. It kept breaking on me, but I eventually got it out.
Another thing I did different was took a sharpie and made a 'line' down the spring before I took it apart so I would know how to align it when I got done.
This is actually quite an easy job. I thought it would be much harder. The coolant lines are probably the hardest part. I had a lot of trouble getting the shaft seal out near the tps. It kept breaking on me, but I eventually got it out.
Another thing I did different was took a sharpie and made a 'line' down the spring before I took it apart so I would know how to align it when I got done.



