teflon seal your mbcs!!

[greyforestgst]

me and a friend (airbrat on this board) built the intake pressurizer thingy a few days back.

both of us leaked a LOT of air through the threads around our MBCs. his is a joe p, mine an xbc.

its easy to do. just take the controller out, put it on a workbench, unscrew the brass nipple fittings (be careful not to lose either of the small balls), put teflon on the threads, and screw them back in. no more leaks! after you do this, you're going to have to turn up your boost again, as all the newfound airflow through the controller will open the wastegate much easier than with the leaky seals.

my vdo boost gauge suffered this same problem, as it had an identical brass nipple fitting for the vacuum line.

keep that boost where it belongs!

 

[wastefuldreamer]

show me the intake pressurizer gizmo. So i can make it.

 

[RipperXX]

huh?? wtf are you guys talkin about??

 

[Defiant]

If you're having to ask, you probably aren't safe with it. Well, you'll probably be fine, but your engine will fit into a shoebox.

For others:

http://home.att.net/~jason510/ManualController.htm

 

[DrZiplok]

I think he means the intake leak tester.

Buy a 2" Fernco rubber coupling, a 2" PVC pipe end and a bolt-in valve stem.

Mount the valve stem in the middle of the PVC pipe end.

Take the band clamp off one end of the Fernco coupling and stuff the PVC pipe end into it. Then put the band clamp back on (it's easier to do the stuffing if it's off).

Now remove your inlet pipe from the turbo inlet and attach the Fernco coupling. Set your engine at TDC and apply compressed air from a compressor or tank. Listen for leaks, use a spray bottle with soapy water to chase ones you can't hear. Does wonders...

 

[Defiant]

Yes, those are good directions for an intake tract pressure tester, but this started with Manual Boost Controllers.

 

[LandoAWD]

Ummm, I'm pretty sure you should block off the MBC when doing an intake leak test per the VFAQ page.

 

[MikeL]

Just for some clarifiaction, you need to crank your MBC all the way down when pressure testing, or else it will bleed off air, as it's susposed to. I think the teflon is a good idea, I personally just used a good amount of LocTite on the threads (although I never saw them leak without it either) on my Hallman. Both the Joe P, and XBC have the bleed port drilled into the MBC housing.

 

[LandoAWD]

Originally posted by MikeL
Both the Joe P, and XMB have the bleed port drilled into the MBC housing.

Sorry for the unclear post above...this is what I was going for.

 

[Bohrn]

ahhhh, set engine at top dead center!!!!

I was wondering how come all the air was coming out the exhaust

and I thought that was right, as the valves are open!! Thanx!!

 

[Todd95TSi]

OH so thats what TDC means......learning learning learning





I'm such a doofus.

 

[Defiant]

Originally posted by Todd95TSi

I'm such a doofus.

Not so long as you keep learning, you aren't. No one was born knowing what all these stupid codes mean. BMEP, RWHP, FWHP, BOV, BCS, FPS, it goes on forever. TBC, AWD, LTHR, SNRF, 5SPD.

 

[P8ntBalla]

how do you set your engine at tdc?

 

[Defiant]

Marked on the crank pully.