Bearzah

iTrader: (6)

People, I need help.

I have a 1st gen 12A with a CarTech drawthrough setup
https://www.rx7club.com/1st-generation-specific-1979-1985-18/12a-cartech-drawthrough-help-814461/
RHB6 Turbo

My wastegate swing valve is seizing and I was looking for advise. I was able to WD40 it enough to get it to work FAIRLY freely, but, after running it for about a week it appears to be happening again.

Any suggestions on how to repair/replace this?

Bearzah

iTrader: (6)

Wastegate problem fixed. The flapper is welded to the shaft which was making a fix more complicated.

I ended up taking the wastegate swing swing valve housing to Bell Turbo in Corvallis, OR. They cleaned it torched it to burn out any rust and let it soak overnight in acid to get rid of any corrosion. This morning (after soaking in a neutralizer) they bead-blasted the gate, re-torched it to burn-out any bead media which might have worked its way into the shaft than oiled it.... Flops around freely now... WOOT!!!

They also trued up my mounting surfaces while they were at it.

I am very pleased with their work.

Without an the exhaust leaking past the valve, the car sounds SOOO much better and you can hear the turbo whine a bit when it spools with a load WOOSH when the wastegate opens

I adjusted the wastegate linkage to let-off at 10psi and tweaked the carb again to run at 11.5-11.8:1 at WOT.

arghx

iTrader: (3)

what turbo is that by the way?

Bearzah

iTrader: (6)

sure.. The link in my 1st post directs you to my thread about the setup

rx72c

iTrader: (8)

Can you stick a external wastegate anywere?
Save you the headache.

arghx

iTrader: (3)

RHB6 is the Probe/Mx-6 turbo?

Bearzah

iTrader: (6)

u could install an external on it, but, this one is fixed and working great now.

The RHB6 is similar to a T3

Bearzah

iTrader: (6)

Thanks for the help all.

If you have any more comments.. please see my main thread at:
https://www.rx7club.com/showthread.php?t=814461