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2.1 Coolant loss (again) : (
Posted: 20 Jul 2011, 15:54
by robber_roo
Hi all
I have an E reg T25 2.1 which has been losing coolant. I've changed the dalek cap as mine was shot. Also changed the coolant junction.
Today I found a small amount of coolant on top of the off side cylinder head, behind the alternator.
Any ideas as i was planning a trip to Cornwall in 2 weeks time.
Many Thanks
___________
Re: 2.1 Coolant loss (again) : (
Posted: 20 Jul 2011, 15:56
by toomanytoys
could be anything..
is it still generating exessive pressure and blowing it back into the top up tank??
Re: 2.1 Coolant loss (again) : (
Posted: 20 Jul 2011, 16:14
by robber_roo
Not on the last run. I checked after the engine had cooled down the top up tank was up to the max but the main tank was about 2/3 full.
Re: 2.1 Coolant loss (again) : (
Posted: 20 Jul 2011, 18:15
by kevtherev
should be full to the brim at all times
Re: 2.1 Coolant loss (again) : (
Posted: 20 Jul 2011, 18:27
by robber_roo
kevtherev wrote:should be full to the brim at all times
Agreed. That's why i'm concerned
Re: 2.1 Coolant loss (again) : (
Posted: 20 Jul 2011, 18:34
by kevtherev
If it was full when the engine was running then as it cools down it should draw coolant back from the top up tank
Re: 2.1 Coolant loss (again) : (
Posted: 21 Jul 2011, 08:23
by robber_roo
I thought when the engine was cold (cooling) the coolant was drawn back from the top up tank (behind the number plate) into the main tank (in the engine bay). So this would make the main tank full when the engine is cold.
This happened (it was drawn back) but i seem to have lost 1/3 of the coolant.
I've checked the oil and all seems good. i.e no mayo
Also, how did the coolant get up on the cylinder head ?
Any thoughts good people
Sorry about this, still learning !
Re: 2.1 Coolant loss (again) : (
Posted: 21 Jul 2011, 11:05
by kevtherev
You could have a pressure leak.
When the system is fully pressurised (about 10 psi I think, the cap releases at 14) it might be easing out of a joint somewhere, and if its easing out onto a hot engine it will evaporate before it's noticed.
On the other hand it could be combustion gas and not air.. Hopefully not
Re: 2.1 Coolant loss (again) : (
Posted: 21 Jul 2011, 12:46
by R0B
Stick some kseal in it.This should stop any small leaks for a while.Not a permanent fix (Although the bottle states it is) But it does last for ages..
Re: 2.1 Coolant loss (again) : (
Posted: 26 Jul 2011, 14:20
by robber_roo
Thanks all
Had the engine pressure tested... All good
I think it may have been a case of too much coolant in the top up tank. I've emptied it out to the min mark, added K Seal just in case and it's running great. Also rewired the rad fan so it turns on automatically. It had a switch on the dash before although i have left it in as an override
Looks like the holiday is back on
