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1986 W126 420 SEL
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113 Posts
Discussion Starter · #2 ·
Hi guys I’ve got a leak coming from this hose it’s by the water pump. I need a replacement but don’t seem to find it.
 

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Outstanding Contributor
1989 560SEC, 1989 560SEL, 1995 E420
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5,315 Posts
Are you talking about the large diameter but very short hose between the water pump and the engine? I believe it's dealer only though I would assume you can find something comparable.

Not sure that hose can be replaced without removing the water pump. Mine was leaking, too. On a whim, I tightened the hose clamps. Leak fixed!
 

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1986 W126 420 SEL
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113 Posts
Discussion Starter · #4 ·
Yeah I have a coolant leak coming from the that short hose and or the water pump. I tried tightening the screws but they are all the way tight.
 

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Registered
1989 C126 560 SEC 2015 W212 220d
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107 Posts
It's part number 1032030082

Number 11 in the diagram below

Gates, Vaico, Febi etc all make replacements if you can't source an OEM

Corrosion on the inlet connection will prevent a hose from sealing correctly.

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Moderator
1987 & 1991 C126
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5,751 Posts
From the MB dealer it is somewhat dear these days, if they have one.

I changed mine in the driveway here after taking the old one off and matching it at the local auto parts store. They cut two lengths for me, one just a tad longer.

Short money for six or eight inches of Gates bulk hose that fit after some strong words on my part.

I used the original clamps to install it.

Now I see why it was so hard to install!!

It’s actually a stepped diameter bypass hose. Very short $ from our usual suppliers too.

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MBL
 

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Registered
1986 W126 420 SEL
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113 Posts
Discussion Starter · #9 ·
I ordered the hose and was wondering if I need to remove the water pump to get it on?
 

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Moderator
1987 & 1991 C126
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5,751 Posts
I ordered the hose and was wondering if I need to remove the water pump to get it on?
I did not have to remove the pump.
The job was a bit ‘fiddly’, and totally doable with the pump in situ.

M
 
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