Two pushes to squirt!!
Thread Starter
Member
Joined: May 2006
Posts: 123
Likes: 1
From: Midlands, UK
2003 C32 AMG, 2003 ML270 CDi
Two pushes to squirt!!
A few months back the C32 started to need two pushes of the windscreen washer stalk in order for water to come out. It was like the first push primed the system, and the second push squirted it!
Dealer diagnosed it as a faulty one way valve, which was letting the washer fluid drain back through the pump. According to their system, the C32 has a heated washer pump which has the one way valve built in, so they ordered one and the car went in to be fitted yesterday.
Dealer called last night to say it seems marginally better with the new pump on, but still not right. They suspect there's no one way valve in this particular pump, despite what the system says. Still a bit of head scratching going on.
Anyone come across this before? Might the problem be down to something else? Or do you know if the heated washer pump does indeed have a one way valve in it?
All ideas gratefully received!!
Going to pick the car up now...
Dealer diagnosed it as a faulty one way valve, which was letting the washer fluid drain back through the pump. According to their system, the C32 has a heated washer pump which has the one way valve built in, so they ordered one and the car went in to be fitted yesterday.
Dealer called last night to say it seems marginally better with the new pump on, but still not right. They suspect there's no one way valve in this particular pump, despite what the system says. Still a bit of head scratching going on.
Anyone come across this before? Might the problem be down to something else? Or do you know if the heated washer pump does indeed have a one way valve in it?
All ideas gratefully received!!
Going to pick the car up now...
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,221
Likes: 11
From: Sydney, Australia
W203 slightly modified
Look under the hood of a 2006 C-Class and you will see that the sun sensor harness and water pipe run in a different path and are longer.
The pipe becomes porous and leaks air which is what causes the water to drain back.
That is what I was lead to believe.
The pipe becomes porous and leaks air which is what causes the water to drain back.
That is what I was lead to believe.
Thread Starter
Member
Joined: May 2006
Posts: 123
Likes: 1
From: Midlands, UK
2003 C32 AMG, 2003 ML270 CDi
Thanks for all the suggestions.
Problem now fixed.
It seems there's a one way valve in the washer jet itself (ie the bit that pokes through the hood). If one fails, then the system loses pressure and the water drains back down to the pump/reservoir.
My dealer replaced the jets, and the problem has gone away.
Problem now fixed.
It seems there's a one way valve in the washer jet itself (ie the bit that pokes through the hood). If one fails, then the system loses pressure and the water drains back down to the pump/reservoir.
My dealer replaced the jets, and the problem has gone away.
MBWorld Fanatic!
Joined: Jan 2007
Posts: 1,152
Likes: 29
From: Sydney, Australia
190D 2.5 (x2), 190E 2.6, W202 C240,W202 C43 (C55), W210 E55, W212 E250CDI
The cheap fix, for others who still have this problem, is to retrofit a additional one-way valve from a W123 (among others) which had it as a seperate part. Just cut the washer hose halfway up and install it in the line.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
