Re: [T3] engine faliure

["Jim Adney" <jadney@vwtype3.org>]

On 11 Sep 2000, at 17:42, Herman Haustein wrote:

> well, after only 3kmi my #3 exhaust valve started burning, what a loss
> of power. I think it was caused by overheating when I disconnected the
> heating elbows and blocked the outlets. It seems these aren't only for
> heating the car , but for cooling the exhaust too.

Sorry!  8=0

The cooling air over the heat exchangers will certainly cool the 
exhause, but only AFTER it has left the head. You need to look 
deeper for a cause of this burned valve in order to avoid a repeat.

It is most likely to have to do either with a poorly done valve job the 
first time around. (You can check them: Fill the combustion 
chamber with water or kerosene and verify that there is no leak.) I 
prefer to lap the valves as a last step to assure a good seal.

Of course the other possibilities are too lean a mixture or too much 
or too little advance.
-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054

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