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duovalve problem - fixed

fred_raven

Active Member
Joined
Sep 26, 2004
Messages
251
Location
Southend essex
Car
2010 s350 cdi
have had a problem with the aircon / heating for a while - was sure - ( been advised by many here ) that it was the duovalve but not keen to spend £180 (stealers price ) or £120 ( europarts price ) and find out all you experts were wrong. Today took the plunge and attacked it - removed 5 torx bolts took the top off and sure enough one of the pistons was stuck solid. freed it up with a set of mole grips and put it back together - now it is working fine.
Couple of words of warning to all who may try -
1. when you take the top of the valve off - beware the cone shaped piston is not held in well and mine dropped below the valve - bugger to find it and get it out.

2. had to take it apart after first attempt - one of the pistons wasnt seated properly - eventualy decided to use the mole grips to slightly crunch the rod to grip the piston - this has had the desired effect.

3. wondering how long it will last , dont really care - at least i KNOW it is the duovalve that was faulty and if it lasts thats me £120 better off

gonna give myself a nana - and several beers

:bannana: :bannana: :bannana: :bannana: :D :D :D

and i just found out i won a tenner on the lottery - so thats me £130 better off
 
well done mate :) sure this will come in handy for a few people in the future!
 
top jobbie :bannana: :bannana:
 

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