coolant leak problem on vr6

[reg5 10]

Could anyone tell me the solution to this problem.ever time i have been

out in my car and in gets warm and i stop let turbo wind down

come back to the car 5 minutes later and its lost all its coolent out the header

tank this has happened 5 times now any advice would be appreciated

Edited July 20, 2012 by davidwort

[seanl82 23]

You need to check where its leaking from first. When you switch off, stay with the car. Pop the bonnet, check the header tank, and check under the car to see if theres any evidence of a leak. You may be able to see a leak, by looking for white crystal deposits around pipework, block, or radiator etc. By the amount thats going each time though, it may be that its just water left and very little coolant. Put some coolant in otherwise it may be just evaporating with the heat under the bonnet where its leaking. There is another possibility, but you've not mentioned rough running, and I dont wanna scare you yet!

[Critical_Mass 10]

is it leaking though and not just back pressure causing it to overflow from the header? Air lock?

[reg5 10]

I have found the leak it is comimg out the side of the

header tank once i have switched the engine off any body got

any clues?

[seanl82 23]

Change the header tank cap for a newer style blue one first, the older black ones are a common ploblem in that they fail to open and vent excess pressure. If this still doesnt solve it, do as C M suggests and bleed it all through again. Very straight forward to do, just remove the cap and run the engine stationary until up to temp. rev to about 2.5k every 30 seconds, for 30 seconds. In between, massage the water pipes to force the air out. Do this a dozen times or so, until coolant rises to the top of the header tank. Switch off, top up the coolant, job done.

[Critical_Mass 10]

I have found the leak it is comimg out the side of the

header tank once i have switched the engine off any body got

any clues?

 

Its not the right side is it, as there's an overflow on the bottle. Like a square hole.

[seanl82 23]

Its not the right side is it, as there's an overflow on the bottle. Like a square hole.

 

Exactly. This is why I suggested as above.

[Critical_Mass 10]

ah sorry sean, didnt realise you'd said that all ready.

 

if its overflowing Id def do as sean suggested and get the car up to temp without the reservoir cap on. NB - put the heater on hot and the fan on full whilst the car is heating up. Once it boils over, leave it to cool. the level will drop and just top up.

 

Then do it again. You may have to do this a few times. It'll always boil over without the cap on, this isnt a worry. once you've done it a few times, put cap on and run up to temp again and see if it happens again.

[reg5 10]

Hi i have tried everything everbody has said.and it still releases coolant

out the side of the expansion tank.but not all the time.a strange one