Another overheating solution

[chris.richard]

From the Alfa digest forum

Fit a 85 VW Golf fan switch that turns on cooler and stays on longer, 3 prong. Fits 164 just reverse the + and -.

It is a Wahler 6017 85 Thermoswitch

Don't understand why they say reverse the wiring, they must both be -ve earth. If I find out why, I'll add it here.

Another part no. given is 321 959 481 M

[roger001]

Talking of cooling I can report that the sandwich type cooler is not man enough for competition purposes, Oil temp was in the red after 15mins of hard usage at Pembery probably the 2 large straights being a contributory factor, this was despite the water temp being perfect.
I'll just have to take the plunge and go for the Laminova type water/oil heat exchanger.
Anothe large dent in the wallet but a lot cheaper and a lot less hassle than knocking out the mains/big ends.

[vojx]

Oil temp was in the red after 15mins of hard usage at Pembery probably the 2 large straights being a contributory factor, this was despite the water temp being perfect.


Shirley, the faster you go the more cooling you get :confused:

[roger001]

sure ...works with water temp as the rad is at the front hence no probs with water temp, unfortunately oil temp goes up lots and lots the harder you push the engine as the current cooler is oil/water sandwich plate off the block it has inadequate capacity, oil/air does not work due to poor air flow in the engine bay, hence switch to large capacity oil/water heat exchanger the 180 mm version apparently has the same cooling capacity as am 18 row air/oil cooler but takes up much less space and is not dependent on air flow.

[Steve Strain]

I too have had the same problem with high oil temperatures. Also looked into buying an expensive aftermarket water/oil cooler.
The solution I came up with was to make one.

Essentially the cooler is a small boiler unit made up from a large diameter stainlees tube with ends to match the existing return pipe from the radiator.
Inside are two washers drilled with a dozen or so holes joined by the same number of matching small diameter stainless tubes.
The water runs through the small tubes and the oil circulates around them.
A local welding teacher at the Polytech tigged it together for me as a class project.

It is very basic in construction but works very well.
I have mounted it between the header tank return pipe and the thermostat, the theory being that when cold, the water warms the oil and when the thermostat is open the water then cools the oil keeping the oil at or near water temperature.

The reason for making it was cost since I had the materials anyway but more importantly I could make it the size I wanted bigger is better and fit it where I wanted it.
I hope this helps someone Unfortunately the picture I have is 130k so cant load it up here but if anyone would like to see it send me a message and I will email it to you.

Steve

[tryphon]

Go for this one:
http://www.capa.com.au/setrab_toc.htm

Info on resellers in the UK at:
http://www.setrab.com