Photos of external water pump installations

[mel1]

Hi Anybody got any pics of electric or belt driven water pump installations? I am not sure which route to take! I have a mk2 Cheers Mel

[Lingen]

For simplicity and a more appropriate/accurate imitation of the original system I would always go for the belt driven one. The electric one has "Issues" in my opinion.
Mike.

[StagJonno]

I've got a Davies Craig electric external water pump fitted. Unfortunately, despite several efforts, I've not managed to get any decent pics of this as it's located well down near where the alternator used to sit. I don't have access to a ramp or lift to try from below.

For me, the biggest benefit for choosing the electric pump is that it continues to run, together with the electric fan, for up to 3 mins following engine switch-off thus removing the heat soak. I was concerned that the temp rise following switch-off in the order of 10C was causing extra stress on the head gasket due to the differential expansion of the iron block and aluminium heads. Standard cars with electrical temp displays don't show this, but the capillary gauge shows it very clearly. The other benefit is that it reduces fuel evaporation from the carbs (though miss the perfume in the garage ). Though likely to also improve things for those suffering chronic hot-start problems (have never suffered this). These benefits are unlikely to be achieved with a belt-driven pump, which stops when the engine does.

[jakesmig]

I don't have a picture at present, but my Davies Craig pump hangs down level with the base of the radiator, and is supported by the hoses, without any other fixings. This is an approved option by Davies Craig, and in my application it was the simplest to achieve.
The hose from the radiator base passes just below the crankshaft pulley to the pump which hangs down alongside the pulley. I have a Rover V8 and I replaced the water pump with a machined plate with an outlet which is in direct line above the pump.
The weight of the pump is fairly small so, in my opinion, there is no appreciable strain on the pipework.
I have a small pump in the heater circuit which simplifies the plumbing, and promotes a good flow through the heater
John.

[DJT]

I don't have any photos, but I installed the external, belt-driven pump over 4 years ago. Mine was bought direct from the developer, Steve Hill, but I believe supply is now through Stagweber.

It has been a "fit-and-forget" modification and I have now done over 13,000 miles in all weathers.

I have no experience of the EWP conversions, but there always seems to be a lot of debate on how they should be plumbed in and controlled.

[Goldstar]

I believe supply is now through Stagweber.

I.

Stag Hood Factory, Dave.

[stagshelf]

I installed a belt driven water pump in 2022 along with a radtec radiator. The car has been in storage since so unable to comment on the effectiveness but the installation was relatively easy

[DJT]

Stag Hood Factory, Dave.

Could be. Neither the Stagweber or The Stag Hood Factory websites mention the water pump kit so couldn't be sure.

[V8burble]

I don't have any photos, but I installed the external, belt-driven pump over 4 years ago. Mine was bought direct from the developer, Steve Hill, but I believe supply is now through Stagweber.

It has been a "fit-and-forget" modification and I have now done over 13,000 miles in all weathers.

I have no experience of the EWP conversions, but there always seems to be a lot of debate on how they should be plumbed in and controlled.

[V8burble]

The stag hood factory is now the supplier for external water pump conversations

[flying farmer]

I have one of the original batch of Steve Hill water pumps which must have been fitted 10-12 years ago and has been totally reliable.

I also have electric pumps fitted to 3 other cars, one of which is a Stag.

I have had to replace one electric pump due to the impeller sticking as the engine warmed up, but this was on an installation that was hard mounted against the advice from the manufacturer. It was also running on a reduced voltage of about 8 volts due to being run continuously through a resistor rather than the manufacturers own control unit, it didn't stick when 12 V was applied.

I have also replaced one that was starting to leak. This was 15 years old according to the date code on the pump, but it was bought second hand on ebay and I have no idea of its original mileage.
My oldest electric pump is well over 20 years old and is now in its 4th vehicle, the latest move prompted by the leak on a Rover V8 engined Toledo and the fact that it was sitting idle due to the car it was in being rebuilt.
The latest pumps have an ally body, and it was simpler to do a straight swap using the old plastic bodied pump than redesign the hard mount used due to the tight space it was fitted in.

I prefer the electric pumps due to their versatility and relative cheapness if not using the manufacturers control unit, but some fabrication is required when not using a kit

[Hughesy]

Refer you to this thread. I run my Stag in 40 plus degree heat with the electric pump and electric fan. No mechanical fan. https://socforum.com/forum/forum/sta...uple-of-photos

[Jacko1998]

I’ve got the external belt driven unit basically a modified Ford 3 litre water pump.
so far so good I’ve installed it and run the engine on my test rig outside the car the temp sits at about a 1/3 on the gauge.
as part of the kit you get a modified hose with a bleed vent for when you fill up.

[alan_thomas]

It won’t apply to many of us here in the UK but it is worth pointing out that you cannot fit the ext mech pump if you have aircon, the pump uses the pulley used to drive the compressor on aircon cars.
I have fitted the ext pump kit and an electric pump kit (different cars obviously) and for simplicity and reliability prefer the ext mech pump.

[Lingen]

At the risk of making a complete fool of myself isn't that pump connected up the wrong way round?? I thought centrifugal water pumps fed in from the centre and out from the circumference? In which case your coolant would be circulating backwards. I suppose it would still work??
Mike.