P38A bleedin' coolant

kermit_rr · Jun 21, 2019

the stuff I have in at the mo is bluecol oe48 which is ethylene glycol based, the owners manual says that stuff, so I'm going to buy some more today to top it up and hopefully get back to approx 50/50
Just got to work and engine stayed happy

21.2mpg on the dash too

Grrrrrr · Jun 21, 2019

Wonder if it was related to that strange sealant you found?

kermit_rr · Jun 21, 2019

The blockage? I blew it into a container and it was just gunge! Thinking remnants of stop leak that had been added by the PO

domino · Jun 21, 2019

As far as I'm aware, all the petrol p38's should have the pink oat stuff, not blue.

RangeRoller dt · Jun 21, 2019

Think it can change with manufacturer. ^^^^ this guy also has a 4.0 (you asked other day about Thor) and knows his stuff.

kermit_rr · Jun 25, 2019

Without wishing to tempt fate, is just like to add, the britpart expansion tank seems of similar quality to OEM and so far can't fault it

kermit_rr · Jul 5, 2019

Aaaah!!!
Coolant pressurised once more!! After many trouble free trips!!!

I'm hoping this time it's down to one of the lpg vapourisers leaking gas into the coolant, is that likely?

I've turned the LPG off at the tank, hopefully that should point the finger

Datatek · Jul 5, 2019

kermit_rr said:
Aaaah!!!
Coolant pressurised once more!! After many trouble free trips!!!

I'm hoping this time it's down to one of the lpg vapourisers leaking gas into the coolant, is that likely?

I've turned the LPG off at the tank, hopefully that should point the finger

Or a coolant leak losing pressure causing it to boil.

kermit_rr · Jul 5, 2019

Something else to check!

kermit_rr · Jul 5, 2019

Thinking about it, it never once went above 95c and that was when i was stuck in traffic so unlikely boiled

RangeRoller dt · Jul 5, 2019

do V8s have a viscous fan??

If that’s duff it could heat up in slow traffic or when stopped

kermit_rr · Jul 5, 2019

Viscous, yes

Datatek · Jul 5, 2019

kermit_rr said:
Thinking about it, it never once went above 95c and that was when i was stuck in traffic so unlikely boiled

Assuming the gauge is accurate, no pressure means it will boil at 100C and the temperature varies throughout the block

kermit_rr · Jul 5, 2019

Good point

RangeRoller dt · Jul 5, 2019

will the coolant not change the boiling point of the water?
I don’t know what temperature a 4.0 Thor runs at.

Datatek · Jul 5, 2019

RangeRoller dt said:
will the coolant not change the boiling point of the water?
I don’t know what temperature a 4.0 Thor runs at.

Not much

RangeRoller dt · Jul 5, 2019

So it’s mainly for corrosive resistance more than cooling effect?

Grrrrrr · Jul 5, 2019

RangeRoller dt said:
So it’s mainly for corrosive resistance more than cooling effect?

Will raise the boiling point a bit. As will the pressure. Not a lot of difference to cooling.

kermit_rr · Jul 5, 2019

Pressure affects the boiling point, antifreeze is just to, er, stop it freezing! Plus all the additives to stop corrosion etc

Grrrrrr · Jul 5, 2019

kermit_rr said:
Pressure affects the boiling point, antifreeze is just to, er, stop it freezing! Plus all the additives to stop corrosion etc

I'm going to get saint to lecture you on partial pressures and what happens when you add salt to water!

P38A bleedin' coolant

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