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General => The garage => Topic started by: alpinecraigmk2 on 01 March 2011, 16:22

Title: 2e 8v dumping coolant when switching off ignition
Post by: alpinecraigmk2 on 01 March 2011, 16:22

this is getting me screwin now, doesnt overheat but if left to idle it will dump the coolant through the expansion bottle overflow when switched off, have noticed that the afterrun fan doesnt come on either, but fan kicks in when running at the right times,

Could this be an air lock? also the temp guage doesnt go above 70 ish (normal driving) but will hit 90 when stationary, could this be a duff thermostat - could this relate to the coolant dumpage?

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: trackday on 01 March 2011, 18:59

could be dodgy thermostat mate when the car is at normal running temp check your rad is hot at the top and bottom if not replace the thermostat and try again,if it is warm all the way through go to a local garage and get the to do a sniff test which will see if there is carbon monoxide in your expansion tank post how you get on  :smiley:

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: Seanl on 01 March 2011, 19:04

sounds like an air lock in the system to me. Try bleeding it also might be worth a try mate and its free!

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: Wayne on 01 March 2011, 21:08

Air lock or too much pressure in the cooling system (head gasket maybe)

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: alpinecraigmk2 on 02 March 2011, 09:54

whats the best way to be sure i have cleared an air lock?

Iv had a new matrix and i thought it was already filled, is it worth disconnecting the hoses to the matrix and prefilling it then reconnecting?

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: alpinecraigmk2 on 02 March 2011, 16:15

also realised i have a small leak at the top of the rad, i suspose this could be letting the water expand and then overflow?
what are your views?

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: rubjonny on 07 March 2011, 10:48

change the tank cap before you get too involved with changing parts, or at least take the cap off and check the seal is seated properly.  a small leak a shouldnt make it overflow, it'll just leak a bit. had a leaky rad for a month and it never blew out the header tank

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: alpinecraigmk2 on 07 March 2011, 10:53

Cheers matey,

I looked at this cap yesterday and found the O ring was pinched in the threads, fitted a new oring this morning and ran it up, it didnt spit any water out and got up to fan temp before i switched it off. so think it may be sorted. will still sort the leak out though, 

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: rubjonny on 07 March 2011, 10:58

http://cgi.ebay.co.uk/VOLKSWAGEN-GOLF-1991-1998-VENTO-CAR-RADIATOR-NEW-/290537158117

looks liek the one you want? i got my mk2 one from him and it was a hella brand so good quality :)

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: alpinecraigmk2 on 07 March 2011, 11:06

Cheers mate,

Iv got it in a mk2 though so using mk2 rad, the leak i have it where i had to blank the mk2 bleed hose off.

I have a mk3 rad going spare though if any one wants one  :wink:

Title: Re: 2e 8v dumping coolant when switching off ignition
Post by: rubjonny on 07 March 2011, 11:58

ah fair enough, you want this one then if its a 1.8 rad:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270710843296

unless you can fix it by faffing with the blanked off nipple :)
have a close look at it mine looked like it was coming from there but it was actually coming from the end cap at the top. i have also seen the plastic caps get split by a rusted up upper rad carrier bracket where it had swollen up with rust