[Rudolf968]

The heater control vaalve don't regulate the inside temperature anymore. Since some weeks it functions like on / off. First me as driver become VERY VERY hot (because of the hot air) and then the air suddenly is cold.

I ve no AC. I think the heater control valve becomes too old (14 years) or the vacuüm line to the valve is to be checked.

Has anyone had the same experience already ? and what is the remedy ?

thanks, Rudolf

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[flash]

likely a vacuum line is disconnected - you can test this by connecting a new hose to the port on the valve, and applying vacuum (read "suck") - if it moves, the valve works, and you need to find the broken connection

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[Mark]

if your HCV is 14 years old replace it before it lets go.

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[PorscheDude]

And leaves you stranded.

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[SILVY968]

You might consider the AUDI metal one.

Brian

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[Rudolf968]

Replacement of the HCV to the metal Audi type is on my To Do list for a while. But I had other priorities first. Last W.E. I installed the M030 sway bars + Design 1 strut brace and next W.E. I still have to install the lower chassis brace.

I will go searching, ordering the HCV soon and then replace the HCV and check the vacuüm line. When its not raining and the inside temp is Very hot ... well ... I have a cabrio, so ...





thanks for all your inputs, the HCV will soon be a solved problem and forgotten

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[Mark]

I really would not worry about the metal one the stock one lasted 14 years for you.

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[jeff968]

[quote name='smokiemon968' post='51032' date='Apr 17 2008, 08:34 PM']And leaves you stranded.[/quote]



How will it leave you stranded? i figure the worst would be no heat, assuming it doesn't start leaking.

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[flash]

it's in line in the cooling system - when it goes coolant goes everywhere in a big hurry

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[SILVY968]

[quote name='jeff968' post='51072' date='Apr 18 2008, 10:33 AM']How will it leave you stranded? i figure the worst would be no heat, assuming it doesn't start leaking.[/quote]



Yes!. I speak from experience.

Brian

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[FRporscheman]

Keep a spare length of hose in the trunk (the right size) just in case my HCV decides to fail. You can bypass it and replace it later.

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[Rudolf968]

In search of the metal heating control valve HCV, I visited 2 Audi garages. Non could help me. They need to know the exact Audi partnumber( = 3 x 3 numbers), or the exact type of Audi (model + year). I suppose someone has done this replacment already before me and will probably have the information.

??? thanks

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[PorscheDude]

The NAPA part number is BK 6601410 and can be ordered at http://www.napaonline.com



and Autozone (part number 846444 or 74671



That is the best I can find for you.

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[Rudolf968]

Thanks Smokymon, but I had that info already and it don't work in Europe.

It's never easy finding a dealer who can help with a special little part.

To mush cars, to mush parts ...

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[jpk]

Try for a 1991 Audi 100. It looks like all of the 5 cylinder models of that era had the vacume controlled valve.

Essentially, it's simply a vacume controlled water valve, apply vacume and the valve closes.

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[Georges]

I just looked at the metal valve that I have and there is no number on it anywhere.

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[Mark]

Just use the stock one it will last at least 10 years and it does not change the flow pattern like the metal one does

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[Rudolf968]

I went on holiday for 3 weeks in the USA. Did a tour (with a Toyota Highlander) starting from LA and ending in San Francisco. I added 4.500 km’s on the ODO-meter of the car. heat of Death Valley and walked around in Las Vegas.



Most impressive : the dimentions of the Grand Canyon and the view from in the helicopter, the structure and colours of Brice Canyon, the kitch of Las Vegas, the Lower Antelope Canyon in Page, the heat in Dead Valley, the nature and sequoia trees in Josemithe park and the visite of Alcatraz.



But almost as pleasant was my visit to a Napa shop (I finaly baught a new heater control valve for 17 USD -- Napa don’t export to Europe) and my visit at Parts Heaven (got some small plastic trim parts from them, and h…c… the view off all those scrapped P-cars).



As for the heater control valve that I got from Napa : the model showed by picture on their website is 100% metal + the 2 ports to connect the water-hoses are not in-line. The HCV I finaly got from them is partial in metal, the regulation mecanism is almost the same as the OEM and the 2 ports to connect the water-hoses are in-line (like the OEM). I guess that on long terms the little valve seat is better closing in plastic than in metal form. Hereby you find a picture of the HCV that Napa now is selling. The ref. number is still the same BK 6601410. I attached a picture of the thing.



P.S. : the price for regular fuel was cheap in Californië  3,70 USD per gallon, that’s 1 USD per liter. In Belgium we now pay 1,4 EUR per liter, that’s +/- 2 USD per liter or 7,5 USD per gallon.



   

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