Installing new thermostat......

[walker]

After reading comments on here by people who have installed a new lower temp thermostat into their V8's I decided to do the same.

However, after the install it is now running hotter than before. On a short trip it was running at 105. Any help would be appreciated as I have to leave Tuesday towing a 2.5T van.

So far I have made sure water is topped up. I also removed the bleed screw and pumped water into the overflow bottle till a steady stream came out the bleed nozzle. I didn't do this while the engine was running. Should I???

[Andrew D]

I would assume you need to open the thermostat to ensure you fill the radiator and engine cavities, so I would think you need to run the motor after filling the expansion tank/hoses/radiator etc.

I know this was the case on the Datsun 1200 so I'm assuming the same for the D2. I would get another opinion though.

Regards
Andrew

[Andrew D]

Adam

The workshop manual suggest you run it then top it up.

The whole procedure is on pages 26-2-13 & 26-2-14.

Regards
Andrew

[walker]

Yes, I did all that but I am still getting hot temps. The only thing I did was change the thermostat. So either the thermostat is faulty or ?????

[Andrew D]

Did you put it in the wrong way around?

By the way, as a bit of insurance, you can check if the thermostat is faulty or not prior to installing by dunking it in hot water.

Regards
Andrew

[walker]

Thanks. You can't put it in the wrong way round as the thermostat is in a sealed plastic T piece.
My gut feeling is that the problem is an air lock so I will spend a bit more time on this tomorrow. If it doesn't come good I will try putting the old thermostat back.

[walker]

After bleeding the cooling system a couple of times I was still getting hot running temps. So I re-installed the old thermostat today and everything is back to normal. I can only assume I got a bad thermostat.

[sniegy]

Drop in very hot water to see if it opens! Got nothing to lose, just for your own sake ;-)

Sent from my iPad using Forum Runner

[walker]

Hi Pete, You can't really see it because it is encased in plastic. I tried pouring hot water into the inlet side to see if it would open and let water out....but it didn't. But then I tried it with the old one that I know works and that didn't work either.

Will do some more testing when I get back from holidays.

have a great Christmas.