Waste gate actuator mounting bolt hole on compressor....

[6SENSE]

Alright once again I discover yet another problem. I was wondering why it seemed that I had to tighten the WG awful tight to get higher boost. The top mounting bolt hole on the turbo compressor for the WG is stripped. I remember seeing this problem before on some stock turbos. This is on my TA33. I dont see any way to tap it for a bigger bolt or heli-coil it, just not enough room between compressor and exhaust housings. Do I have to dissassemble the turbo just to fix this? Surely someone else has gone through this. Please share your experiences.
I recently tuned to where I can get 25lbs with no KR and the car feels like a freight train. It is pulling MUCH stronger than when I ran the time in the sig below. However boost levels tend to be inconsistent (sometimes only 18lbs in 1st, then jumps to 22-23 in 2nd....). I know this is attributed to the WG pulling away from the compressor under boost with the rod tight. I am also experiencing something from the engine that I can only describe as a "fluttering" sound and bogging (no KR). Could be too much methanol, or maybe plugs need tighter gapping than current .032? OR... could it also be coming from the WG issue? The needle on the boost gauge starts going crazy when it reaches peak boost level, shaking back and forth.
TIA for any help.

 

[Lee Thompson]

thread

Couldn/t you just tap it 5/16? That is a metric thread, is it not? How about moving over .500 in. and drill a new hole?

 

[6SENSE]

Thanks for the response LT. Yeah its a metric thread. Says 8.8 on the bolt head. Problem with tapping/drilling is the lack of space to work between the compressor and exhaust housings. That is why I was wondering if anyone had been through this and if so did they have to take apart the turbo to fix.
Other option would be just get one of your DPs and use a external WG, right . Easier said than done though, funds are a bit of an issue right now unless someone has a heck of a deal for me.

 

[SLOW_85]

I stripped mine out.
I just added 2 washers and it tightened. Been years and hasn't come loose yet.
Might try for a temp fix.

 

[TurboRegal84]

I did that with my 84 when I had it.

Just removed the Turbo, Pulled off the Compressor housing, and Helicoiled it. Not a bid deal, and it is ALOT stronger with the Helicoil than it was with the Alum Housing!!

 

[6SENSE]

Thanks. By chance do you remember what size heli-coil you used?