Ok, well I'm running a Maxrev manifold and the damn wg gasket is leaking. I was previously just using the metal ring that came w/ the tial, but it started leaking after a while. I just recently threw on a composite gasket as well, and it just recently blew out and I have another leak.. Anyone have any suggestions how to fix this?

I think the flange is warped, so that's probably the problem, but do you think if I just used the metal ring and rtv is could seal it up? Just looking for suggestions. Thanks.

-Mike

 

RTV wont work under those temps. If the flanged is warped then you pretty much have to get it CNC'd to flatness again.
I would take a look to see if the bolts are bottoming out on the manifold itself....i had to trim my bolts.

 

Hmm.. my manifold came w/ studs so that's definetly not a problem for me. Hmm.. we'll see I guess, I've seen RTV hold up to some pretty extreme temperatures, I might have to give it a try. Are you just using metal ring on your manifold to seal the wg? Thanks.

-Mike

 

Do you know this for sure, or is it what you heard?

I've run high temp RTV for at least 6 months with no leak yet. I have it on my Downpipe/Exhaust flange, and my wastegate/dumpipe. No problems....yet. Lasted longer then my gaskets so far...and much cheaper then buying those $6 a piece gasket from tial!

 

is your wg flange studed? if not just have the flange "decked", by this i mean laying it on a large belt sander. if it is studed. consider getting a flange that is not studed and having it welded on to your manifold. when i worked at maxrev we had acouple wg flanges come back warped. we just cut em off and welded new ones on.

 

This is exactly what is happening to me! I was wondering if anyone else has this exact same problem. I am using a max rev manifold, tial 35mm, etc. I cant turn up my boost pressure past .5bar, no matter what since the airflow is leaking out of the wastegate/manifold location. I have tried tons of stuff, including making my own copper gasket last night which didnt do jack. I am super pissed that i have an engine that can see 1bar daily, yet i am stuck at .5bar. I have just assumed that the flange was warped, and the gaskets always blow out in the same location. Keep me posted about the situation, I am going to call max rev monday morning and see what they are going to do about this. I find this to be extremely annoying, and I am very irritated with their product right now...

 

yeah, just take it to a machine shop and they can deck it for you. if it is studded i would try the ultra high temp rtv. for a gasket and i know it might sound ghetto, but try cutting a piece of liscense plate with tin snips in the shape of a gasket. it worked for me.

 

Yeah, it's definetly kind of annoying.. it does appear to be slightly warped. I really don't have the time nor can I afford to pull the manifold and send it back to maxrev and have my car down. Well, I removed the composite gasket and just used alot of rtv for now.. I know people have used it on exhaust parts and it seems to work, so I'm hoping this'll do the trick. It's sealing for now, but I'm worried after a little while it might start leaking.

Regarding boost.. you should be ABLE to push a bar... I was just running a bar but boost builds much slower.. Oh well, we'll see how long the rtv holds. Hopefully it'll last a while..

-Mike

 

Wastegate gasket fried in GSRgrrls car too. Pulled it off, threw the POS gasket over shoulder, liberally applied "Ultra copper" dookie, reinstalled wastegate. 6,000 miles since, no leaky.

 

Have you tried a fire ring gasket?

 

Normally i would say that yes I can boost to whatever boost pressure i desired, spool up will be sacrificed. I have tried everything, 4 different boost controllers, two electronic, two manual. I have set-up many turbo cars over the past few years, and have never seen anything like this happen before. I have enlisted the help of a local rx7 friend that is also well versed in turbo knowledge, after we tried a few different vaccum line routing for the boost controller, even taking the bottom vaccum line off of the bottom port (which should make us boost 2bar, or more!) we still hit .5bar. I have had the wastegate off the manifold at least 10 times in the past two weeks, disassembled it and inspected ever singe piece in the wastegate. The diaphram looks perfect, the valve looks perfect, it opens with pressure on the bottom port and stays closed with pressure on the top port...tried this with a air compressor nozzle. I have even switched my wastegate with a friends 35mm tial, and same exact thing...and his works perfectly. I know that nothing is hooked up wrong, and the only possibily is that the wastegate gasket is leaking like that. I managed to salvage a semi-decent Tial paper gasket from a friend that was used, threw it on there and went out on the highway. We turned up the boost, hit .7 bar, then turned it up again and hit .75 bar, then turned it up again and went back down to .5 bar. This confirms that the gasket is blowing out causing my problem. After tearing off the wastegate another time that night, the gasket was blown apart on the one side and nothing was left except the metal skeleton of the gasket, giving no seal. I have tried everything, no gasket, made-up copper gasket, wheel bearing grease (it carbonizes and seals very nicely with heat!) and a make shift paper gasket. Nothing works. I have no idea, nor do any of my friends. I have tried everything, though of everything and still come up with nothing other than it needs that gasket. I am going to order the fire ring turbonetics ones on monday and have them 2nd day air here.

 

Damn man, that sucks you're having that many problems.. What manifold are you running btw? You must have a pretty bad exhaust leak for the boost to be limited to .5 bar.. The same thing happened to me using the tial paper gasket, the metal skeleton was left over when it blew.. It sounds like the wg flange is definetly warped pretty bad, because I don't see any other reason as to why it doesn't seal, at least for a short while..

I just used a bunch of regular rtv and it's sealing for now, so hopefully it'll be fine.. Good luck.

-Mike

 

you guys are crazy with your rtv! but hey as long as it works

 

Rtv is useful for alot of ****.. Hell I've seen it used w/ headgaskets also.. and when the gasket was pulled is was still there.. It can stand VERY high temperatures from what I've seen..

-Mike