Improving Cooling 4 cylinder motor.

[j_radcliffe]

I was inspired by Demetris to go a different route to improve the cooling on my Rover 2000 automatic. I was going to fit an electric fan, however I decided to install an 11 blade fan and a fan clutch instead.

Then fan clutch I installed was for a Jaguar XJ-6, Hayden 2765. This has a flange with 5/16th inch bolt holes, and a 3/4" pilot. I sent off an old water pump to be rebuilt and had the flange turned down to fit the 3/4" pilot. I flushed the cooling system with muck out and water and removed the radiator and flushed with a hose. I also renewed all the radiator and heater hoses at the same time.

The rebuilt water pump went on easily. The fan clutch was easy to install as well. I did however have to modify the fan. The fan is also from a Jaguar XJ6. I had to cut off 1.25" off each blade. Ideally the should be done by a machine shop, who can then balance the fan afterwards, which will help conserve the water pump bearings.

The result is the car runs much cooler in the heat. I just drove the Rover 2400 miles to Stanthorpe Queensland, and return, for Nat Rove. Some of the days the temps were over 30 degrees, and the car ran just at the start of the operating range of the temp gauge.

 

[chrisyork]

That looks an excellent and neat job! Now that you have the total cooling available sorted, why not go up a little with your thermostat so that the engine runs in the middle of the green all the time?

Chris

 

[j_radcliffe]

I think that is a good idea. I am currently running a 160 degree high flow thermostat. I think I will change it to 170 degree high flow in 2 years time. I only use this car when in Adelaide Australia, every 2 years, for 3 weeks. I am about to head back to the US on Sunday, so I will not have time to chase one up. 170 degrees was the Rover recommendation.

James.

 

[Demetris]

Well done for working that out.
However, i don't understand why you had to cut down the blades. There's no cowling to worry about. The only possibly preblematic point would be if i remember well the radiator output hose.
I wouldn't worry for the fan balance either, since it's plastic and very light.

 

[j_radcliffe]

Without cutting the fan the fan would foul the radiator mount at the bottom of the radiator, coming off the cross member. The water pump on the Rover 2000 is not centered in front of the radiator, is a about 2 inches down from centre. If it was the fan would have been perfect as it was 18.5 inch diameter, the core is 19 inches square.

James.