Thermostats!?!

O Bife · Sep 11, 2014

This might seem as a tad odd, but do the thermostats come with different values?

By that I mean, are some rated/set to kick in at lower temps and other at higher?

If so, what's what and where or how does one find out what's what?

Datatek · Sep 11, 2014

In the past, you could certainly get thermostats with different opening temperatures, not sure now as there are so many different versions. There is no need to find out really, the OEM standard for the P38 works very well as long as it's a good quality item.

O Bife · Sep 11, 2014

Mmm, well, I had a new one popped in a few weeks ago and now she is running with the needle just under the half way mark (about the thickness of the needle under).

Before, she was running between 1/4 and 1/3.

Also I have noticed that hse is now getting through more water/coolant than before.

I must admit, she doesn't go above the half way, but compared to before she is running much warmer.

Datatek · Sep 11, 2014

O Bife said:
Mmm, well, I had a new one popped in a few weeks ago and now she is running with the needle just under the half way mark (about the thickness of the needle under).

Before, she was running between 1/4 and 1/3.

Also I have noticed that hse is now getting through more water/coolant than before.

I must admit, she doesn't go above the half way, but compared to before she is running much warmer.

So now the needle is sitting in the correct position

Before the stat was either opening early or failing to close.
Loss of water is another problem, you have a leak somewhere or HGF.

O Bife · Sep 11, 2014

Datatek said:
So now the needle is sitting in the correct position Before the stat was either opening early or failing to close.

Ah, so now she is running at a good temp. That's good news, thanks Datatek.

Datatek said:
Loss of water is another problem, you have a leak somewhere or HGF.

HGF???

martyc · Sep 11, 2014

Head gasket failure

Datatek · Sep 11, 2014

O Bife said:
Ah, so now she is running at a good temp. That's good news, thanks Datatek.

HGF???

Head gasket failure. As it's a diesel, it's more likely you have a small water leak or the pressure cap is not sealing.

O Bife · Sep 11, 2014

Thanks Datatek. Will get the guy to look into it.

Littelwill · Sep 11, 2014

Wasn't there a problem a while back with the coolant caps not sealing or over pressurising the system?

Datatek · Sep 11, 2014

Littelwill said:
Wasn't there a problem a while back with the coolant caps not sealing or over pressurising the system?

Not sealing can be a problem, mine goes very tight long before it seals. Needs a strong hand to get it properly down.

Littelwill · Sep 11, 2014

If its not a silly thing to ask how do you know when it has sealed correctly..?

wammers · Sep 11, 2014

V8 engines thermostat opens at 88 degrees up to 1999. 85 degrees 1999 and on. Diesel 80 degrees. If you are using coolant find out why.

O Bife · Sep 11, 2014

wammers said:
If you are using coolant find out why.

Do you mean why use coolant?

Also, are you refering to using coolant on diesel?

wammers · Sep 11, 2014

O Bife said:
Do you mean why use coolant?

Also, are you refering to using coolant on diesel?

In post #3 you said you are using more coolant/water than before you had stat done. If so you must be losing it find out why this is happening. Gauge running more or less in centre of scale is correct.

Grrrrrr · Sep 12, 2014

Could be there was an airlock and that's why the level dropped? Of course, if it is still doing it then check all hose clips are screwed up tight and the expansion tank (as Datatek said).

Thermostats!?!

O Bife

Active Member

Datatek

Well-Known Member

O Bife

Active Member

Datatek

Well-Known Member

O Bife

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martyc

New Member

Datatek

Well-Known Member

O Bife

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Littelwill

Well-Known Member

Datatek

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Littelwill

Well-Known Member

wammers

No longer with us, RIP

O Bife

Active Member

wammers

No longer with us, RIP

Grrrrrr

Technician, Bodgit & Scarper Ltd

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