I used a Craftsman 1/4-inch drive deep well socket with adapter to 3/8-inch drive ratchet to get that bolt out on my '77. The 1/4-inch version has a thinner wall than the 3//8-inch. Try to use a 6-point; they're less likely to strip the bolt or to crack.
How's the AC system? This is a good time to either replace or rebuild the York compressor, as it's got to come off to get to a bolt (or two?) to remove the mounting bracket. Rebuild kits are still available, price is something like $12 to $15.
This job is a big-time PIA....
Mark in Lakewood, CO
From: "Nate" <vwnate1@yahoo.com>
To: "diesel mercedes" <diesel_mercedes@yahoogroups.com>
Sent: Monday, August 22, 2011 10:34:01 AM
Subject: [diesel_mercedes] Re : water pump bolt I can not reach question 1978 300D
That bracket appears to be the mount for the aftermarket AC system your car is equipped with , sadly you'll have to loosen or remove it , usually there's a 90° bend in part of the bracket , find that and the bolt in that bent part , loosen or remove to allow sufficient movement to access the bolt .
Remember to hand file the opening in the bracket so the next time you'll be able to reach this 10MM ATF bolt easily . use a large round file only to prevent stress cracks from occurring .
I hope this helps .
-Nate
Rodger wrote:
>
> Hello All
>
> I am trying to change the water pump on my 1978 300D.
> I have removed the radiator, fan & fan shroud.
>
> There is one bolt on the water pump I can not reach with a wrench or socket. There is a large bracket that seems to hold the power steering pump in the way. I removed the obvious bolts holding the bracket and it still does not move.
>
> I posted photos in the photo section in an album called
> "Rodger's Questions"
>
> Please advise.
>
> thank you
> Rodger
>
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