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Old 24-04-2018, 22:56   #1
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Corrosion and possible leak of condensation (Mercedes OM636)?

I have some corrosion on my OM636's injection pump, which may come from leak above (cooling system??).

How should a tackle the cleanup? Is it possible to remove the injection pump and just give the stuff a good wire brush, and repaint it?

For the source, I'll check the raw water hoses and connections first.

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Old 29-10-2019, 10:44   #2
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Re: Corrosion and possible leak of condensation (Mercedes OM636)?

Hi - I have also got an OM636 and I am replacing it with a beta.
I have a brand new mechanical lifter pump (new in box, as they say on eBay) which you might be interested in.
As well, my injection pump is in good working order and (no offense) looks brand new compared to whatever happened to yours.
I have a bunch of other spare stuff too, which I will no longer need.
Thanks,
Dave
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Old 29-10-2019, 10:50   #3
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Re: Corrosion and possible leak of condensation (Mercedes OM636)?

Find and fix the source of the problem and then worry about cleaning up the mess.
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Old 30-10-2019, 14:10   #4
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Re: Corrosion and possible leak of condensation (Mercedes OM636)?

Without knowing your engine I would advise getting a workshop manual & follow the process to remove injection pump. You have to be very careful not to get any dirt inside the injection pump as they depend on tight tolerances. If it's working fine I'd definitely try cleaning & painting but first do as post #3 says
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Old 31-10-2019, 02:40   #5
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Re: Corrosion and possible leak of condensation (Mercedes OM636)?

MERCEDES-BENZ OM 636
The Mercedes-Benz OM 636 four cylinder in-line, indirect injection diesel engine with a cubic capacity of 1767 cm3 and producing up to 42HP was originally developed between 1946 and 1949.
During the 1960s, 70s and 80s, the OM 636 engine was marinised by a number of specialist firms throughout Europe. Among them Wizeman WM-36 (Germany), Volvo Penta MD4 (Sweden), Renault RC40D (France), Solé Diesel SM-636 (Spain) and Nannidiesel 4.180 (Italy/France).

Spare Parts & Rebuild Kits
Contact - MERCEDES-BENZ OM 636

OM 636 Technical Description
Technical Description - MERCEDES-BENZ OM 636
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Old 31-10-2019, 06:23   #6
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Re: Corrosion and possible leak of condensation (Mercedes OM636)?

Hey Tom, I have that Mb engine too... 35 ft sloop from England. I'm not a mechanic so no real help from me until if it happens to mine... so good luck. I am in sandy hook,nj heading south and the PO left a bunch of gaskets and spare engine parts if we can cross paths l may have a gasket for you. I saw the post and wanted to ask you how long it takes to start....in mine takes over a minute to catch when starting. Ross
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Old 15-07-2020, 14:13   #7
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Re: Corrosion and possible leak of condensation (Mercedes OM636)?

Quote:
Originally Posted by rossny View Post
Hey Tom, I have that Mb engine too... 35 ft sloop from England. I'm not a mechanic so no real help from me until if it happens to mine... so good luck. I am in sandy hook,nj heading south and the PO left a bunch of gaskets and spare engine parts if we can cross paths l may have a gasket for you. I saw the post and wanted to ask you how long it takes to start....in mine takes over a minute to catch when starting. Ross
Hi Ross,

It takes a bit to catch but somewhat shorter than a minute. There is a quick-start glow plug kit to remedy the problem.
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