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View Full Version : AWM 1.8T has special exhaust valves???



SirDaft1
08-21-2007, 10:26 PM
Most of you know the story... last week my tb went on my ride. Now i'm getting my head re-ported i need 4 new intake valves and 8 new exhaust valves. I trust the guys at Renn-Art... but they said the exhaust valves are special dealership only parts because they are hydrogen filled valves (to keep the valves cool)!?

Is this true? I've never heard of it before. And because of this... each exhaust valve is $76 a piece ($76 x 8 valves needed = ALOT of $$$ for valves). Any of you Four Ringers know about this?

Nebone
08-21-2007, 10:31 PM
You should be able to use a non AWM head as long as you still use the Hydraulic Cam Tensioner. Maybe you can just replace all the exhaust valves with non-hydrogen filled ones.

sjthomas
08-22-2007, 05:10 AM
It's sodium, not hydrogen. I don't think hydrogen's all that good at dissipating heat, it's a lot better at igniting. Not a desirable feature in an exhaust valve.

Rosati went through this when he rebuilt his engine's head - he put non-sodium filled valves in and then when he went BT he had to replace them. Check for his posts on here and AW. I'd say if that's what it came with from the factory, that's what you want to replace them with. Doing it once with the right parts is cheaper than doing it twice.

SirDaft1
08-22-2007, 05:11 AM
lol good point. so it is sodium filled valves?



It's sodium, not hydrogen. I don't think hydrogen's all that good at dissipating heat, it's a lot better at igniting. Not a desirable feature in an exhaust valve.

mike-2ptzero
08-22-2007, 08:00 AM
I have stock valves sitting here that came out of my ATW head. Another AZ member was going to buy them but then decided to use the money on a few other things. If you want them let me know.


$76/each? Why would they cost so much? Did you call up a dealer to ask them how much they retail for?





Full valve set from 034 motorsports is $135.

Includes
-1.0 mm oversize intake valves in high-temp stainless, high flow profiled valve head, 6mm stems, standard installation.
-Standard size exhaust valves in high-temp inconel, high flow profiled valve head, 6mm stems, standard installation.


(added)
ECS lists

Exhaust valves
TRW brand sodium filled at $62.95 each
Osvat brand non sodium filled at $14.95 each

Intake
TRW brand at $29.95
Osvat brand at $9.95

Nebone
08-22-2007, 08:16 AM
Heres what you do..

AutohausAZ has these valves with a listed dealer price as $75.68, and sell it for $15.94.

These are AWM specific.

http://www.autohausaz.com/search/product.aspx?sid=p4wuwv2crl1i3r55idhrfou4&makeid=800002@Audi&modelid=1368109@A4%20QUATTRO%20&year=2001&cid=20@Engine%20Parts,%20Seals%20%26%20Gaskets&gid=5328@Exhaust%20Valve (http://www.autohausaz.com/search/product.aspx?sid=p4wuwv2crl1i3r55idhrfou4&makeid=800002@Audi&modelid=1368109@A4%20QUATTRO%20&year=2001&cid=20@Engine%20Parts,%20Seals%20%26%20Gaskets&gid=5328@Exhaust%20Valve)

Rosati
08-22-2007, 08:28 AM
OEM exhaust valves are expensive. They are sodium filled (yes to keep cool)

I got mine at cost and they were still around 50 each

mike-2ptzero
08-22-2007, 08:36 AM
Heres what you do..

AutohausAZ has these valves with a listed dealer price as $75.68, and sell it for $15.94.

These are AWM specific.

http://www.autohausaz.com/search/product.aspx?sid=p4wuwv2crl1i3r55idhrfou4&makeid=800002@Audi&modelid=1368109@A4%20QUATTRO%20&year=2001&cid=20@Engine%20Parts,%20Seals%20%26%20Gaskets&gid=5328@Exhaust%20Valve (http://www.autohausaz.com/search/product.aspx?sid=p4wuwv2crl1i3r55idhrfou4&makeid=800002@Audi&modelid=1368109@A4%20QUATTRO%20&year=2001&cid=20@Engine%20Parts,%20Seals%20%26%20Gaskets&gid=5328@Exhaust%20Valve)


LOL, they aren't even soduim filled so I dont see how they "list" for $75.68 when ECS sells the same ones for $14.95. Man talk about a scam at Autohausaz.
All of the 1.8t heads use the same valves.

AudiRacerS4
08-22-2007, 08:49 AM
OEM exhaust valves are expensive. They are sodium filled (yes to keep cool)

I got mine at cost and they were still around 50 each

long time no see rob hows everything going with your car bro?

onemoremile
08-22-2007, 09:00 AM
I see a solid inconel valve as an upgrade to a hollow stem filled with sodium. The sodium melts and acts as a heatsink which keeps the valve head slightly cooler but transfers heat to the valve guide. The stems are thin and hollow through the guide area. Inconel just doesn't care how hot it gets.

mike-2ptzero
08-22-2007, 09:07 AM
I see a solid inconel valve as an upgrade to a hollow stem filled with sodium.

Which is why I have the set from 034 in my car.[:D]

hey4
08-22-2007, 10:00 AM
just buy any exhaust valves. If you want OEM look for used ones although they are very hard to find because exhaust valves almost always give out completley. I bought mine on ebay for $12 each but I didn't find them last time I was looking for some more. I would trust 034 and go for those if you don't have time to waste

onemoremile
08-22-2007, 10:17 AM
Don't buy just "any" valve. Turbo cars put a lot of heat into their exhaust valves and a lot of valves won't cut it. Inconel is the right material for the job and 034 Motorsport is trusted with this sort of thing. Generic valves lead to generic standing on the side of the road wishing the car would run syndrome.

mike-2ptzero
08-22-2007, 10:22 AM
just buy any exhaust valves. If you want OEM look for used ones although they are very hard to find because exhaust valves almost always give out completley. I bought mine on ebay for $12 each but I didn't find them last time I was looking for some more. I would trust 034 and go for those if you don't have time to waste

I have a full set sitting on my desk, would be more then welcome to sell them for about that price plus shipping.

darth tater
08-22-2007, 10:47 AM
I've used the osvat ones in many cars without problems.. All stock turbo applications..

If you are just planning on sticking with a stock sturbo.. just use them..

Wizard-of-OD
08-22-2007, 10:54 AM
If you need stock valves check Mike...if you need Iconnel valves send me a pm.