Water pump housing replacement how-to - PeachParts Mercedes-Benz Forum

ROLLGUY · #1 04-29-2013, 01:59 AM

When all 5 water pump bolts snap off (actually it takes only one), the housing needs to be replaced:

I harvested a good housing off one of my spare engines and cleaned it up:

I used a stone to clean and flatten both gasket surfaces:

The parts ready to install:

It is very important to use anti-seize on the bolts:

The finished job:

There is no need to remove the thermostat housing. The water pump housing can be removed (and replaced) easily by loosening both clamps on the short section of hose. Be sure to use some kind of gasket sealer on both gaskets. I use sealer (spray copper coat) only on one side mostly to hold the gasket on, but you may want to do it differently. I apply it only on the part being replaced so the next time no sealer will have to be scraped off of the part staying on.

Diesel911 · #2 04-29-2013, 08:46 AM

Nice Pictures.
So far it is part of the Engine I have not had to deal with; but you never know.

I notice there is some pitting on the Hose Neck.
When I changed the short 2 inch Long Bypass Hose on one of the Hose Necks I found deep pitting once the corrosion was cleaned off. I filled the pitting with JB Weld and after cured filed and sanded the JB Weld to match the contour of the Neck.

Stretch · #3 04-29-2013, 08:51 AM

Oh shiny by-pass => nice

Simpler=Better · #4 04-29-2013, 09:14 AM

Quote:

Originally Posted by Stretch

Oh shiny by-pass => nice

That was my first thought too

ROLLGUY · #5 04-29-2013, 10:19 AM

Quote:

Originally Posted by Stretch

Oh shiny by-pass => nice

That is what they look like new from Pelican Parts!

ROLLGUY · #6 04-29-2013, 10:24 AM

Quote:

Originally Posted by Diesel911

I notice there is some pitting on the Hose Neck.
When I changed the short 2 inch Long Bypass Hose on one of the Hose Necks I found deep pitting once the corrosion was cleaned off. I filled the pitting with JB Weld and after cured filed and sanded the JB Weld to match the contour of the Neck.

Good idea. JB weld is great stuff for repairing things like this. The photo was taken before I sanded the hose connections, but they cleaned up rather nice with no deep corrosion. This is the second housing I have had to replace in the last few months, and just now decided to take photos and post this thread. I hope I don't need to do another one soon, as I have no more good housings left!

Simpler=Better · #7 04-29-2013, 10:43 AM

Can I have your old housing? I'll pay shipping, el cheapo parcel post is reasonable

ROLLGUY · #8 04-29-2013, 03:12 PM

Quote:

Originally Posted by Simpler=Better

Can I have your old housing? I'll pay shipping, el cheapo parcel post is reasonable

Sorry, I think I gave it to my brother for scrap. I think I might have another one with only a couple broken bolts in it, I will look.....Rich

Simpler=Better · #9 04-29-2013, 03:45 PM

Quote:

Originally Posted by ROLLGUY

Sorry, I think I gave it to my brother for scrap. I think I might have another one with only a couple broken bolts in it, I will look.....Rich

No stress, I'm just looking for a "free spare" I'm confident I can get the bolts out with an hour or two on the mill.

ROLLGUY · #10 04-29-2013, 03:59 PM

Quote:

Originally Posted by Simpler=Better

No stress, I'm just looking for a "free spare" I'm confident I can get the bolts out with an hour or two on the mill.

If that is the case, maybe I could send all the bad ones I have to you to fix!

Stretch · #11 04-29-2013, 04:26 PM

One word if the drilling and milling don't work out =>

Heli-coil

ROLLGUY · #12 04-29-2013, 04:42 PM

Quote:

Originally Posted by Stretch

One word if the drilling and milling don't work out =>

Heli-coil

Technically, that is two words

Stretch · #13 04-29-2013, 04:51 PM

Quote:

Originally Posted by ROLLGUY

Technically, that is two words

Ah ha! You fell into the tiger trap my friend! Hyphenated is as good as one word (bad scrabble rules apply)...

ROLLGUY · #14 04-29-2013, 05:20 PM

Quote:

Originally Posted by Stretch

Ah ha! You fell into the tiger trap my friend! Hyphenated is as good as one word (bad scrabble rules apply)...

You got me there....Rich

MBeige · #15 04-29-2013, 07:39 PM

Did you replace the water pump also?

When I did the timing chain job the water pump to housing gasket was stuck on the water pump itself. My indy said they glue it to the housing and typically just replace the pump when it gets removed. Since I was reusing mine I had to scrape it off manually. What a royal PITA!