924Board.org

Alex Roy

Okay, I am taking out my exhaust so I can replace my transmission, while I am at it, I took apart the wastegate to make sure it is okay.....and it definitely isn't. The diaphragm is cracked and there is a huge hole in it.

Has anybody recently replaced their wastegate diaphragm and know of a good/cheap source for a new one? PartWerks is selling them on ebay for $100, which is a bit steep.

Zuffen · Posted: Sun Mar 23, 2003 1:15 pm Post subject:

http://www.andial.com/
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Bob Dodd - 924turbo@cox.net
931 1982, 944 1982 euro, 924S 1988SE, 93 968 tip 06 Silver Cayenne S, 06 Black Cayenne S

I have Way too many cars, parts for the 931,944 and 951

924 turbo · Posted: Sun Mar 23, 2003 2:11 pm Post subject:

I guess you know why you're getting 15 lbs. of boost now.

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Jon Furst

Smoothie · Posted: Sun Mar 23, 2003 2:17 pm Post subject:

I got one from PAR in NY approx 5 years ago.
Did it tear where it folds? My last one tore there - I think it's not only from being folded, but also from vibrating against the inside of the housing. Next time I have to change mine I'm thinking of maybe attaching a section from an old diaphragm either to the new diaphragm, gluing it on below the fold and have it extend up to protect the fold area from contacting the housing - or attaching the old diaphragm section right to the housing adjacent to the fold.

The last new one I put in, I treated with a silicone preservative - just on the upper (vent) side of the fabric. That was on 11/14/93 - same one's in there almost 10 years later, so maybe it was a good move..
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Smoothie · Posted: Sun Mar 23, 2003 2:23 pm Post subject:

That's right - you were getting 15lbs... What I don't get now is why it stopped at 15 - should have been tripping the overboost cutout switch regularly.
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Alex Roy · Posted: Sun Mar 23, 2003 3:29 pm Post subject:

It was getting 15 lbs consistently....until this past week, I noticed it wasn't stopping at all. The P.O. had disabled the cut off switch, and I took the switch out completely so I could put my boost gauge connection in it's place.

The waste gate covered in oil on the inside. It looks like the air/oil separator is (or was) bad. It doesn't look like I am getting oil coming from the separator any more (my new intake isn't covered with oil on the inside, and it's been there for a few weeks, and during hard driving too). I'm guessing that the oil ate away at the rubber.

Smoothie · Posted: Sun Mar 23, 2003 4:02 pm Post subject:

Whoa Alex - livin' dangerous without the cutout switch.

Could be the diaphragm had at least a small hole in it for some time that allowed the boost to build consistently to 15, then a week ago it completely let go.
Sounds like a crazy amount of oil got into the wastegate - but how? Through the control line from the intake - just doesn't sound right though..too much. Mine was completely dry last time I had it apart. -And I'm not aware of any way the operation or inoperation of the oil seperator could introduce oil into the wastegate. Unless it got there from the other side, through the exhaust? A problem with crankcase breathing causing pressure in there that backs up through the turbo oil return line, forcing oil past the turbo seal and into the exhaust... Leaking oil from the turbo - maybe a blocked oil return line from the turbo to the oil pan adding to a leak? -One of these combined with a worn valve guide in the wastegate letting oil from the exhaust past the valve into the upper part of the WG...? I don't know, just speculating.
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Paul · Posted: Mon Mar 24, 2003 11:19 am Post subject:

Tore my 80 all original wastegate apart today. The spring was extremely dry and rusty. The pressure side of the diaphram had a very light coating of oil.

Might as well replace both the spring and the diaphram. I'm looking for a .8 bar spring.

D Fox · Joined: 03 Mar 2003 Posts: 7 Location: Charlotte NC

You can get a diaphram from Andial. I bought one from them about a year ago so I do remember the price but I believe around 20-25 dollars. and I have a spring from a 1980 turbo if you need one.

Zuffen · Posted: Wed Mar 26, 2003 12:18 am Post subject:

the last cost from andial was like 55 for the black rubber and 75 for the teflon white.

Just call for current prices and please list.

I do have a white and black unit new
_________________
Bob Dodd - 924turbo@cox.net
931 1982, 944 1982 euro, 924S 1988SE, 93 968 tip 06 Silver Cayenne S, 06 Black Cayenne S

I have Way too many cars, parts for the 931,944 and 951

Alex Roy · Posted: Wed Mar 26, 2003 1:27 am Post subject:

Is one type better than the other, or are they for different types of wastegates?

I tried to call Andial yesterday but the parts guy was out to lunch. I'll try again today.

Alex Roy · Posted: Wed Mar 26, 2003 3:08 am Post subject:

Andial has them for $59.

924 turbo · Posted: Wed Mar 26, 2003 3:11 am Post subject:

Last time I was at Andial, there was a 959 there!

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Jon Furst

Smoothie · Posted: Wed Mar 26, 2003 4:17 am Post subject:

The teflon vers is probably about $80 then...
Seems logical that the teflon vers would last longer - I don't know. I'm just considering myself lucky that the black rubber one I put in has lasted almost 10 years. I have a spare in a ziplock bag in a box that I bought about 5 years ago, so I was getting ready to have to replace it that long ago - should probably open the bag every couple years and retreat the spare with some silicone.
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Zuffen · Posted: Wed Mar 26, 2003 5:39 am Post subject:

The teflon is high heat and racing app.

best to ask them

as you can see 59.00 is better than partwerks ripoff price of 100.00
_________________
Bob Dodd - 924turbo@cox.net
931 1982, 944 1982 euro, 924S 1988SE, 93 968 tip 06 Silver Cayenne S, 06 Black Cayenne S

I have Way too many cars, parts for the 931,944 and 951