9 replies to this topic

[cian]

My mini seems to run very hot ( recent 1330 rebuild ) but not boil a couple of people said try it with no thermostat a friend of mine had a similar problem and ran without a thermostat with no issues for years, are there dangers of running no thermostat?

Edited by cian, 07 April 2014 - 06:47 PM.

[cambiker71]

Not good without a thermostat because number 3 & 4 cylinders will get very little coolant flow, the water pump will only pump water through the thermostat end and back into the radiator, either get a new thermostat or at least use a blanking sleeve.

[Dan]

Yes, it can lead to hot spots in the engine around cylinder 3 and 4 because even if you fit a sleeve it changes the coolant flow through the block. It will also make the engine take longer to warm up, and removes all temperature regulation. Thermostatic cooling was a major advance in engine design.


In the 1930s.

[Carlos W]

Is it running hot on the gauge? Is the gauge correct?

 

Is the mixture right? Timing correct?

 

IT's better to fix the cause than the effect!

[jaydee]

You can just drill two 1/8'' holes in the thermostat. Dont run without one.

But as above, fix the cause rather than tampering the effect..

[cian]

The engine does need tuned since the rebuild and the plugs are very white but i was told a leaner mixture is better for running in, the temp sender was changed and it reads almost 120c

[Carlos W]

The engine does need tuned since the rebuild and the plugs are very white but i was told a leaner mixture is better for running in, the temp sender was changed and it reads almost 120c

 

lean mixture will make it run hot

[cian]

Im just trying to cover all the bases

[Rog46]

Was the engine properly flushed out during/after the rebuild, could there be debris inside restricting water flow? Might be an idea to back flush the radiator too.

[cian]

I flushed the rad 2 or three times, did not flush the engine, i take it run the garden hose down the thermostat housing?