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1995-2002 Range Rover P38A
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99 Posts
Discussion Starter · #1 ·
I've put a new thermostat in to cure the engine not getting up to temperature.

I've bled the system as best I can and according to RAVE, but I've obviously got air in the lower half of the thermostat. As such, it's not getting hot enough to open.

The gauge is getting up to the middle quite quickly and I've let it get up to 95c (203F) and decided that's hot enough so switched the engine off to let it cool a bit.

I've tested the thermostat opens and closes using hot water from thekitchen, so I know it does work and opens at the right temperate.

Any tricks to do this? I even tried heating up some coolant to boiling and quickly pouring down the small pipe that goes to the top of the thermostat housing with no success.

Thanks
 

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JACK'S GRANDAD
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9,270 Posts
Never had a single issue after various engine rebuilds and installations.
I have had to put a little pressure in the tank though, after removing the cap obviously.
You can try to add some pressure to the system yourself.
 

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Registered
1995-2002 Range Rover P38A
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167 Posts
I would try bleeding the system again. Did you make sure that the bleed pipe was clear? Maybe try elevating the front end about 10 inches, open the reservoir, start the engine and check the coolant flowing into the reservoir to make sure there are no air bubbles. It should be a constant stream of coolant not interrupted by air.
 

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1995-2002 Range Rover P38A
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99 Posts
Discussion Starter · #4 ·
Cheers for the input!

He just did a big burp while I was watching, enough to empty the reservoir, twice! Hopefully that's it and I was just being impatient!!

Parked up on a steep hill too, maybe that helped!!

Temperature seems to be fluctuating 90-95c so there's some cooling going on somewhere!!

There's still some air somewhere, all the coolant that came out, hasn't gone back in yet, let's see what happens over the next few days
 

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1995-2002 Range Rover P38A
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167 Posts
Keep bleeding. Try carefully and gently to squeeze the top coolant hose a few times.
 

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Registered
1995-2002 Range Rover P38A
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99 Posts
Discussion Starter · #6 ·
I've done lots of squeezing! Also discovered the pressure trick too! That definitely helps

Definitely no air in the top of the engine, radiator seemed to be getting warm at the top too so hopefully that's it!

Thanks everyone
 
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