L322 2005 TD6

backinblack · Jul 15, 2019

Does anybody else get a check coolant warning at 80mph or is it just mine?

Only done 80mph 4 or 5 times but each time I have had the warning.

wammers · Jul 16, 2019

backinblack said:
Does anybody else get a check coolant warning at 80mph or is it just mine?
Only done 80mph 4 or 5 times but each time I have had the warning.

Low coolant warning can mean two things, either the coolant is low or the antifreeze mix is too weak. Or both.

Henry_b · Jul 16, 2019

Or don't do 80

Fixed eh?

backinblack · Jul 16, 2019

wammers said:
Low coolant warning can mean two things, either the coolant is low or the antifreeze mix is too weak. Or both.

Checked both and they are fine.

Henry_b said:
Or don't do 80

Fixed eh?

I know but sometimes I just get carried away

gold rover · Jul 16, 2019

backinblack said:
Checked both and they are fine.

I know but sometimes I just get carried away

No real clue but could there be a blockage somewhere, which for some reason is only affected as you hit 80+ ?

Addit: Just had a thought. Could it be a wire. Under 80 the movement/vibrations are maybe not enough to affect it, hit 80 and it moves?

Saint.V8 · Jul 16, 2019

I used to get this in my E46 3'er......turned out to be an airlock, when the engine got over a certain rpm for a sustained period, it used to drag coolant out of the expansion tank so quickly that the airlock in the rad expansion hose would form preventing coolant to recirc back to the tank....

One thing they state is when bleeding or topping up the coolant, make sure the rad bleed hose is clear of coolant first to allow the air in the system to pass through....

backinblack · Jul 16, 2019

@gold rover & @Saint.V8 cheers for the suggestions. Saint.v8 theory does sound the more likely as it did happen once at around 50 going up a long hill when the car jerked a few times as if cutting out and then recovered. I'll try sticking it manual and get the revs up for a while. And I will check the wiring

backinblack · Jul 16, 2019

I think the Saint may have scored another point here. 70mph 4th gear 1/4 mile and ping, check coolant level. Did the same on return trip with the same result. Another niggle to put on the list

Cheers for the pointer.

L322 2005 TD6

backinblack

Well-Known Member

wammers

No longer with us, RIP

Henry_b

Think outside, no box required.

backinblack

Well-Known Member

gold rover

Well-Known Member

Saint.V8

Dyed-in-the-wool 100% RR Junkie

backinblack

Well-Known Member

backinblack

Well-Known Member

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