vacuum/boost check valves

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DE80q
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Joined: Mon Mar 04, 2013 9:25 am
Location: York PA 17403

vacuum/boost check valves

Post by DE80q »

Well, as anyone could have predicted, the 25 year old check valves in my 20vt swapped 80q have failed. Does anyone have any BTDT on what is a good one to pick up? I was looking at the ones on silicone intakes, but wasn't sure how well they would work. The price is very reasonable, and they come 10mm and 12mm versions. Also, can anyone tell me what size I would need.

Thanks
"If you can't find one, make one"

Dallastown, PA
1991 Audi 80 quattro (20vt project)
1991 Audi Coupe Quattro (project: my first 20v)
2007 Mitsubishi Raider(Dakota in disguise)
2019 Chevy Cruze RS hatch (wife's little red sporty car)
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88a5tq
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Re: vacuum/boost check valves

Post by 88a5tq »

I feel stupid asking this but where are there check valves in the 20vt system? Unless you're talking about the one right where the locking diff controller taps into the intake system? Not even one in my CCV system
1991 Audi 200q Holset
1991 Audi 200q Felbaum'd
1988 Audi 5000 TQ
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vt10vt
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Re: vacuum/boost check valves

Post by vt10vt »

McMaster and they have cad drawings so just measure and match
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DE80q
Posts: 2572
Joined: Mon Mar 04, 2013 9:25 am
Location: York PA 17403

Re: vacuum/boost check valves

Post by DE80q »

88a5tq wrote:I feel stupid asking this but where are there check valves in the 20vt system? Unless you're talking about the one right where the locking diff controller taps into the intake system? Not even one in my CCV system

Im not sure where that are in a factory 20vt setup, but my setup is using a JT head with a vacuum pump and vacuum boost brakes. I have 2 check valves in my setup, one right before the vacuum pump, and one in the booster.

Thanks Shawn, I'll check into that.
"If you can't find one, make one"

Dallastown, PA
1991 Audi 80 quattro (20vt project)
1991 Audi Coupe Quattro (project: my first 20v)
2007 Mitsubishi Raider(Dakota in disguise)
2019 Chevy Cruze RS hatch (wife's little red sporty car)
varia
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Re: vacuum/boost check valves

Post by varia »

DE80q wrote:Well, as anyone could have predicted, the 25 year old check valves in my 20vt swapped 80q have failed. Does anyone have any BTDT on what is a good one to pick up? I was looking at the ones on silicone intakes, but wasn't sure how well they would work. The price is very reasonable, and they come 10mm and 12mm versions. Also, can anyone tell me what size I would need.

Thanks


BRAKE BOOSTER CHECK VALVE VOLVO 2001–2013 S60/​S60R 2001–2009 Booster Valve brake part# 9485451 $20.09
¯\_(ツ)_/¯

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my2000apb
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Location: CT

Re: vacuum/boost check valves

Post by my2000apb »

i bought a 996 unit and its was liek 8 bucks
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