UPDATED - 1989 CR250R Waterpump cover repair question

AHRMA361
Edited Date/Time 5/18/2015 8:27pm
I know there have many threads on this topic in the past. In this case, I am asking for some input from people that have repaired their case with epoxy successfully.

I know a new cover can be bought and haven't decided against that option but if it can be fixed I will spend the $200 I saved on something else.

I have done this repair on my 1982 CR250 and it worked well. On this 1989, I am not worried about the impeller area as I see no real problem fixing that. My concern is the area where the seals go. The bore seems good enough but where the seals seat against that small flange in the opening is pretty corroded away.

So the question is, is that a real critical area or is it just to locate the seals and even that smaller lip won't pose any issues.







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markit
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markit 4/12/2015 2:54pm
4/12/2015 2:54pm
JB weld would take care of that.
Honda88L
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Honda88L 4/12/2015 4:13pm
4/12/2015 4:13pm Edited Date/Time 4/12/2015 4:17pm
In looking at the micros for that year it is a bit confusing - does it have the press fit tin seal the impeller shaft runs through? It actually shows two set ups on bikebandit and partizilla both-see below. Either way I have concerns with that corrosion because that would be putting JB weld on the motor side instead of the coolant side.

http://www.partzilla.com/parts/search/Honda/Motorcycle/1989/CR250R+A/WA…

I would add that the JB Weld on my 83 came loose and made a sludge, lodged under the impeller, seized it, no coolant moving - motor blew 40 minutes into a GP in Athens. I paid the price($250) and got an 81 aluminum cover and haven't looked back.

I noticed Partzilla has the 89 cover for $167... if it was me grab that and run Evans Coolant - you will never have a problem.

Also - I don't think we've met but I'm thinking I will see you in Athens.....I will be spectating. Looking forward to it.

MXVet261
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MXVet261 4/12/2015 6:44pm
4/12/2015 6:44pm
Your best bet is to just put it back together and weld a bunch of fins on the head and cylinder for extra cooling if needed.

I've heard that's the hot setup!
AHRMA361 5/18/2015 5:22pm
5/18/2015 5:22pm
So I decided to get the new Aluminum replacement part. Ordered it over a month ago. Just my kind of luck. I got a cal from the dealerl: Backordered! No idea when it would be available.

Finally arrived today. On first inspection, it looks really cobby. The surface inside and out is rough enough that the mold was either hastily built or is pretty worn out. All the machined and tapped areas look nice enough though. I guess I will just tell people it is a sand-cast "works" part from Honda.

Figured I would post some pictures for those that may be considering fix or replace.

Impeller area - New -vs- Old



This thing is "Ruff" enough, it should bark



Is that 600 or 800? LOL Compare the 600 cm3 with the old cover in the impeller pic above.



Finally, the inside was pretty rough as well. Also has some shiny finish applied to it for what reason I have no clue. Mold release agent?






One other note is that the water connections are screwed in on the Alu cover whereas they were cast into the Mag cover and rotted just the same.

$166.54 + S&H to my door. I would say it's a wise investment.

The Shop

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MaxPower
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MaxPower 5/18/2015 5:33pm
5/18/2015 5:33pm
I think the sand casting looks trick.
How much did the cover cost?
AHRMA361 5/18/2015 8:27pm
5/18/2015 8:27pm
MaxPower wrote:
I think the sand casting looks trick.
How much did the cover cost?
Look up and to the right from your Dog. Your answer is there Dry

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