I believe without checking i have water pumps like these on my flat head. Altho they have a bigger visual area where the square hole is. They are both seeping as soon as i put water/coolant into the engine. There seeping visibly from the square hole. I have no experience of removing the pumps. So my question is. . . . . Behind the pumps is there a seal and a thermostat on each side? Thanks
It`s no problem to change the water pumps; of course there should be a seal behind the pump. The thermostats are in the water outlets of the heads (left and right); attention: one (rusty) bolt is inside the lower water outlet of the pumps....good luck
Yes a seal/gasket between the pump and the block. I'm guessing you're using the one "hidden" bolt that goes down in the center of the water outlet?
Thanks for the input I'm gonna spray it all with plus gas tomorrow and give it a day or two before tackling the job.
Is it worth resealing these myself or is it a real itch of a job? I've looked online and found a guide.Just wondered if anyone has first hand experience?
Personally, I would just get new pumps. It's not a hard job. But... as stated above... be aware of the bolt that is inside the water outlet once the hose is removed.
The pictured pumps are '50-'51 Mercury with staggered/different diameter pulleys, and to my knowledge are not yet available new at this time, so they have to be rebuilt. I would find someone with experience to do the work, as the pulleys can easily break during disassembly/assembly.
Typical flathead coolant pump leak. Be sure you buy the right pumps. 50 Ford and Mercury are different, as well as the trucks. Also wide belt and thin belt. Have a read http://www.jalopyjournal.com/forum/showthread.php?t=643930
Thanks for the link. Found a very useful rebuild link. Ill have to stick it up when I stuble across it again.
If only it was that simple lol. Im in the U.K. but on a brighter note i had my merc flattie running for the first time today under my ownership. Not ran since 2009 apparently. New plugs and fresh fuel and it seems to run well considering the fact it has no, or little exhaust. I have got another question tho, the little spring looking jobbies on the end of my exhaust manifolds? Are they like a bi metalic valve to aid getting up to temp? Thanks
Here's a good tech article on how to repair them yourself. Be very careful not to break the pulley when pressing it off the shaft. http://www.flatheadv8.org/Waterpump/pump.htm
As to the warnings about pulley breaking.....that is a real concern. I dealt with it, after breaking a pulley, by selecting a piece of pipe of suitable length and diameter, spliting it lengthwise, and inserting it under the backside of the pulley, where it rested against the pulley hub. I then used a common hose clamp to hold the halves together and got the whole works into my shop press, put a bearing removal plate against the pipe, and pressed the pump shaft out of the pulley. Reinstalling the pulley is a breeze........no special tooling required. Ray
Those valves are for getting heat in to the intake manifold when the engine is cold. You don't really need them. Here is a good link on water pump rebuilding. http://www.flatheadv8.org/Waterpump/pump.htm 19Fordy beat me to it.
Yes those are mercury pumps on eBay , who was selling them? If they were a good price they may have been worth grabbing as they look new. I am not aware of any repro merc pumps but maybe someone is. Essentially the same as for but different mounting height.
I thought cheap at circa $196 the pair. i'll find em again they had a few different ones. Yeah I kinda thought they were not needed and that's the link i found looks concise. thanks Great tip the split rod thanks Found that one but thanks for the input. it looks concise and well written.
I sourced the water pumps here. http://www.ebay.co.uk/sch/dakoninc/m.html?item=150985349614&ViewItem=&rt=nc&_trksid=p2047675.l2562
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