Morris Minor Owners Club

just looking round the lowlight today, i dont think my engine has a pump, the cooling fan is on the dynamo, is it a bolt on job to fit a pump/heater, cant really suss it at a glance, happy xmas friends

have a pea at the engine number on the side of the block, some of the later sidevalves wothout waterpump have a blanking plate for it. I have got a seperate waterpump for my heater, a Clayton Airconditioning and demisting unit.
I think I have USHM2, thats the one without any waterpump or place to accomodate one

i cant c anywhere for a pump, but there is a heater in the car but hoses cut off under bonnet, so i suppose the origanal engine had a pump but this gold seal unit dont , i wonder if i could fit T-pieces in the top & bottom hoses with a brass tap , now then!

You could always put in an electric pump....

SR, is there a number on the engine? It looks the same as my sidevalve, and mine had T-pieces in the top and bottom hoses, the heater having its own waterpump.
I hope this helps

Onne

From your photo you have an early MM engine type USHM2 with no provision for a water pump. A fan belt driven accessory was available but is very rare. From the look of the engine I would concentrate on getting it running before spending money on a pump. I have a set of drawings for the pump andI can send you a copy if you send me an A4 SAE and details of your car for the register.
Michael Perry
Series MM Registrar
Address in Minor Matters :

willdo mike, well asked the rodders on NSRA website,about aftermarket pumps, one of the boys came up with a site, £105, might find a cheaper one , at least i know they r available

also this
http://cgi.ebay.co.uk/JAGUAR-XJ8-HEATER ... dZViewItem

Im sure you can get cheaper one than that! (also do you have one to send back???)

im sure u can, no i dont, imjust showing MM owners an example/possible solution

Various modern cars have electric waterpumps (to allow water flow after engine has stopped). These tend to be for turbo engines due to their ability to be very hot
e.g. Volvo 440 Turbo (presume also the 480 turbo)
also one version of late 90's Golf had one.

You're unlikely to find one in the scrap yard but a few years back we got hold of a new VW one at work just to strip down and look at it. It was a well designed unit as it had no potential leak path between pump and motor [pump blade was magnetically coupled therefore no shaft seals to fail ]

cheers ray ,jags have em too

One of the MM guys out here fitted a Facet electric fuel pump to circulate coolant through his heater.

He had it fitted for years without a problem. He's since sold the car but it's still fitted & working fine.
Might be a cheaper option.

thanks scott, found this also .a jowett with a seperate pump bolted on top

Without a water pump, how does the sidevalve engine avoid overheating after just a few miles???

Its called a "thermo syphon" effect, basically the water circulates on its own because of the difference in water temperatures and densities, (ie. the colder stuff is more dense and tends to drop through the system and the warmer stuff rises, this creates a constant flow of water..... (at least thats how it works on the 1926 Morris, as a point of interest the veteran has a chain driven pump running off the distributer drive)

not as quick as a w/pump though

So that should work, to a certain extent, with an A series powered Moggie, bearing in mind how short the hoses are to the radiator????

Yes, but its no where near as effective as a pump....

Check out ebay item 4612765710.

Ref chickenjohn's comment on 27th Jan
Without a water pump the series mm engine is cooled by thermosyphon cooling. Hot water in the engine rises and flows out through the top hose into the radiator where it cools and flows back into the engine through the bottom hose. That is why the Series MM has such a large radiator.
Simple but effective.
Michael Perry