Is there a shorter crank bolt for use without a viscous coupler.

[barkerwilliams]

Fitted electric water pump and removed thermostat, car now run cooler so thinking of removing the engine fan and viscous coupler - is there a shorter bolt available to replace the long crankshaft bolt?

Alan

[I am Groot]

Not sure but i did same a while back and kept the engine fan on. The cars in wards for other stuff and they say as long as electric fans working with the ewp properly then the viscous can be removed and has been.
nigel

[steve.n]

Alan, did you remove the original pump or just the stat?
How about removing the fan and leaving the viscous coupling on?

Steve.

[I am Groot]

Alan, did you remove the original pump or just the stat?
How about removing the fan and leaving the viscous coupling on?

Steve.

Normal to remove the old water pump and "bung" the hole. No point in leaving the old pump it could cause problems and besides it robs a few bhp.

[barkerwilliams]

Steve,

Old pump gone and bunged.

As most original pumps leak and put a load on the jack shaft and would prevent the new pump circulating coolant it would be counter-intuitive to leave one in the system.

Car now runs cool for many miles, perhaps too cool and the electric fan is not called into action and the pump ticks along on its reduced duty cycle. It is difficult to fit fan belts between the bolt and the radiator and a couple of inches of extra space would be great. Most other cars I have experienced when moving do not need to call on the electric fan nor have a mechanical fan, forced airflow through the radiator from moving forwards is sufficient so why waste energy on over-cooling the engine?

Alan

[Lingen]

Alan. If your electric pump is plumbed in correctly, you should be able to run with the thermostat in place, and the engine should then run at the correct temperature without the pump having to pulse on and off, or alter speed.
Mike.

[mopoole]

When my car went to Faversham's last year, as I'd removed the viscous fan, Trevor put a shorter bolt in so belt changing was easier. Therefore must be available

Maurice

[Matt Cook]

Alan,
They are available:

https://www.ejward.co.uk/new-parts/engine-gear-box-and-servicing/cooling-and-heating-system/vicous-fan-pulley-bolt-shortened.html

I hadn't spotted that Ward's do them and I bought a pack from here:

https://www.ebay.co.uk/itm/5-8-UNF-x-2-2-1-4-2-1-2-3-3-1-2-4-5-High-Tensile-Bolts-made-to-BS-1768-/112334687879?var=&hash=item0

I'd be happy to send you one for the cost of postage as I can't see me needing the others.

Matt

[I am Groot]

Alan. If your electric pump is plumbed in correctly, you should be able to run with the thermostat in place, and the engine should then run at the correct temperature without the pump having to pulse on and off, or alter speed.
Mike.

The ewp has a digital controller and sensor so you can run the engine quite accurately at the correct temperature. Its pointless to leave the old thermostat in place and again could be trouble.

[I am Groot]

Steve,

Old pump gone and bunged.

As most original pumps leak and put a load on the jack shaft and would prevent the new pump circulating coolant it would be counter-intuitive to leave one in the system.

Car now runs cool for many miles, perhaps too cool and the electric fan is not called into action and the pump ticks along on its reduced duty cycle. It is difficult to fit fan belts between the bolt and the radiator and a couple of inches of extra space would be great. Most other cars I have experienced when moving do not need to call on the electric fan nor have a mechanical fan, forced airflow through the radiator from moving forwards is sufficient so why waste energy on over-cooling the engine?

Alan

As long as your moving know problem - but obviously when stationary you need the electric fan just like a modern car. My own most definitely needs it when I switch off as the pump circulates for 30 seconds while the fan cools so that you don't bake.

[Lingen]

Groot.
The "Professional" installation I saw was causing trouble. Without a thermostat the bypass system was not working. This meant that either the engine took forever to warm up with the pump running, or if it was switched off and there was no circulation, some parts of the engine heated up much more rapidly than others, which was bound to lead to all sorts of trouble. It was a simple matter to restore the correct circulation at all times by altering the pipework to include the bypass, and replacing the removed thermostat. Now the pump can be left at pre set speed, and the thermostat left to do the temperature regulation. The car is often driven hard, and the cooling system is working perfectly in all conditions.
Mike.

[I am Groot]

Groot.
The "Professional" installation I saw was causing trouble. Without a thermostat the bypass system was not working. This meant that either the engine took forever to warm up with the pump running, or if it was switched off and there was no circulation, some parts of the engine heated up much more rapidly than others, which was bound to lead to all sorts of trouble. It was a simple matter to restore the correct circulation at all times by altering the pipework to include the bypass, and replacing the removed thermostat. Now the pump can be left at pre set speed, and the thermostat left to do the temperature regulation. The car is often driven hard, and the cooling system is working perfectly in all conditions.
Mike.

More than one way to skin a cat i guess Mike. On my car with the digital controller i have to say it works perfectly with no thermostat. When the pump runs and for how long is controlled as is the engine temp. I really have no complaints. It was the Davies Craig ewp kit with controller and silicone pipe to feed the heater circuit supplied by wards and fitted by myself with a bit of help over the phone from Mick Ward. I highly recomend it!
nigel