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Engine Specific Info and Questions => IDI Engine => Topic started by: subsonic on August 31, 2007, 09:21:47 pm

Title: sodium filled exhaust valves
Post by: subsonic on August 31, 2007, 09:21:47 pm

Are these still being made for the TD?  I had someone tell me not to bother with the sodium filled stems anymore.  I dont know about that.  I thought they offered better heat disapation.
Whats the best price you guys have come up with for a set of intake and exhaust valves for the 1.9 TD? Prices seam to be all over the place.  I dont care about the stem size, I will live with 1mm bigger stem.  The heads getting ported anyway.

On a slightly different note,
Does anyone know if the hydraulic lifters are the same part number from 1.6 to 1.9?

Title: sodium filled exhaust valves
Post by: Black Smokin' Diesel on August 31, 2007, 10:31:24 pm

The MK4 2.0 lifters are lighter than the MK2/MK3 lifters, only cost a bit more and are a direct fit on a 1.6 or 1.9 diesel engine.

http://www.germanautoparts.com/Volkswagen/Golf/Engine/133/10

Title: sodium filled exhaust valves
Post by: subsonic on September 01, 2007, 08:14:32 am

Did you find that out through experience or through a etka type program?

Are there any other applications that use the same valves as the 1.9IDI?
Anyone have an etka and mind checking?  If I can source a part for a US car, I can get it from a friend at the auto parts store at his cost.

So are the sodium filled valve stems worth the extra cash if you plan on running hard?  I was planning on having the exhaust valve face ceramic coated anyway.

Title: sodium filled exhaust valves
Post by: Barry W on September 02, 2007, 07:15:48 pm

Quote from: "Black Smokin' Diesel"

The MK4 2.0 lifters are lighter than the MK2/MK3 lifters, only cost a bit more and are a direct fit on a 1.6 or 1.9 diesel engine.

http://www.germanautoparts.com/Volkswagen/Golf/Engine/133/10

Now I didn't Know that.

Title: sodium filled exhaust valves
Post by: CoolAirVw on September 03, 2007, 07:00:04 pm

Quote from: "subsonic"

So are the sodium filled valve stems worth the extra cash if you plan on running hard?  I was planning on having the exhaust valve face ceramic coated anyway.

I read somewhere that stainless valves were better than the sodium filled.

Sodium filled was good technology for 1970 or 1980 but todays tech is better.  

Note:  I read that in regards to Porsche 914 exhaust valves.  Jake Raby who is the a top VW Type 4 engine builder uses stainless on every engine.  I'm sure that those aircooled engine valves take worse abuse than ours.  (maybe debatable??)

Take it with a grain of salt cuz ya cant believe everything you read on the internet.   :D

Oh, also sodium filled valves cant be resurfaced, have the potential to burn (catch fire), and are very expensive and probably difficult to get.

Title: sodium filled exhaust valves
Post by: subsonic on September 03, 2007, 07:43:48 pm

So does anyone have any info on stainless valves that are the correct size?  I am guessing that someone must have spec'ed them before.