waterpump repair

[evo550]

Here's one for the Honda lovers.....repair to a rotten water pump housing.

Holes big enough to pass my thumb through and alot of surface corrosion around rest of pump area incl;uding seal area.

Can these be repaired properly or is it best to just replace?

It's for a Husky...........no sewing machine jokes please.

[evo550]

Took some snaps today, sorry about the quality, camera wants to focus on anything else but what I want it too.
http://s118.photobucket.com/albums/o82/evo550/?action=view&current=IMG_0602.jpg
http://s118.photobucket.com/albums/o82/evo550/?action=view&current=IMG_0598.jpg
http://s118.photobucket.com/albums/o82/evo550/?action=view&current=IMG_0605.jpg

Looks ugly right??

[LWC82PE]

it looks a bit beyond it to me. ive used those low temp alloy filler rods to weld a cracked thermostat housing but nothing as cancerous as that. if its not rotted and flakey all the way through you might be lucky but if its just really corroded and you cant get to any decent fresh alloy underneath i reckon its better to get another. Are they really hard to get?

[evo550]

Yeah, I think it might be a bit beyond repair as well,
 As for getting another, I have a funny feeling it will be same case senario as the early Honda's, all second hand ones are R/S and new is nla.
Have though about isolating the system and just running a 12v electric pump to circulate fluid.....does anyone know of a compact/light 12v pump designed to pump HOT coolant..must be something in the automotive industry.

[LWC82PE]

or what about a thermosiphon system?

[090]

I reckon its still worth the effort.I would get into it with a small wire wheel or die grinder to clean it up and use a liquid steel to fill and coat all surfaces . Put something like a bit of plastic in behind it and bog away. Do it in a few applications. I have reformed a whole part of my casing on my cr125m, as they are notorious for dropping the chain and smashing the engine numbers off. I just fixed my cr500 but not anywhere near as bad as yours. Got to be worth $20  and a couple of hours work. Like you say, whats the likely hood of getting another .

[Lozza]

Plenty of 12v water pumps around superkarts use them all the time. Could easily fix that with JB Weld also, depends which way you want to go about it

[oldfart]

looks like a "Ferropre" or "Mega poxy " job to me . Water based 2pack available from most plumbers outlets . Sticks like shit to a blanket and hardens like alloy

[GMC]

I was about to say in the Husky thread what a good deal you got, maybe not so
It looks clean enough, I got my 87 KX 250 for similar money ( 2 chambers + 1 chamber fix) So far I have found the airbox lid held on with whitworth bolts, need I say more

I assume the cover is magnesium?
The easiest way to fix is to replace but as you say good ones for that model would be hard to find.
It should  weld okay so long as their is good base material their some where. The other drama will be any machining required if the pump shaft or seal needs supporting.

[holeshot buddy]

sand blast the area clean and
use devcon mix up with hardener and
fill all holes and while wet smooth out
to form original shape fixed for life

[evo550]

I think the major repair problem is going to be the housing for the seal which has all but disappeared and would be very costly/time consuming to redo, I have done a patch job with quicksteel, but the seal is now a permanent fixture and i'm not sure it is still square on the shaft
My other option is one of these,which is looking more and more like the solution

http://www.daviescraig.com.au/documents/EBP/Bosch_EBP_flyer.pdf