Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 12, 2025 ...

m11 water pump

November 12, 2016, 06:12:07 pm

I see the engine water pump on our ism450 has started to leak. Has anyone changed their water pump and how difficult is it to change?

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Re: m11 water pump

Reply #1 – November 12, 2016, 06:22:30 pm

Should be a rather straight forward swap out

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Reply #2 – November 12, 2016, 06:27:27 pm

Beau just replaced mine.

Remove the front of the engine.  Support engine and remove front engine mount.  Then pulleys and plate.  Drain engine coolant.  Remove hoses from the pump. Remove gear drive and release the pump.  Once released, the pump comes straight back and out.

Reverse to install new one.  Boy was that a whole lot easier to write about.

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Reply #3 – November 12, 2016, 06:29:53 pm

Here is a m11 Celect plus shop manual procedure

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Reply #4 – November 12, 2016, 08:11:03 pm

Thanks Bob I have really bad internet tonight so hope it is better tomorrow so I can read it on my computer

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Reply #5 – November 13, 2016, 12:57:14 am

Seems like a job for an experienced wrench turner like you.  You and I are the only 80's foretravel people here as far as I know

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Reply #6 – November 13, 2016, 02:17:09 pm

In the light of day was able to determine where the leak is and it is not from the weep hole, but from where the pump slides over the tube from the block, so probably a bad o ring, but looks like the pump will have to be taken off. I think I can do it if I was home. It might be hard to do while we are on the road. Will have to see how bad it leaks when the engine is warmed up. I think the cool weather has caused the o ring to shrink. Thanks for the pages Bob that makes it much clearer as to how it comes apart.

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Re: m11 water pump

Reply #7 – November 13, 2016, 04:45:14 pm

Might be a good idea to put a wrench on the water pump bolts and make sure they are properly torqued.  Might be an easy fix if one has backed out.

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Reply #8 – November 13, 2016, 08:14:38 pm

Unfortunately the bolts are tight but looks like it will have to be taken off to replace the o ring not going to be a lot of fun

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Reply #9 – November 13, 2016, 10:17:38 pm

Ya, it wasn't a high likelihood check, but I have seen these small/easy fixes work before.

Worth a 2 minute check.

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Reply #10 – November 14, 2016, 02:48:41 am

Not my normal style but barrs leak tabs might be a good option.  I did buy some last week

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Reply #11 – November 14, 2016, 05:59:39 pm

That thought did cross my mind, so will have to think on it a little bit. I was thinking that as soon as the paint work is done I will run it to warm it up and see if maybe the leak will get better as maybe things will swell with the heat. At least I can be hopeful.

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