GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Mr Blue on 29 June 2012, 21:23
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Hi all,
Burst another core plug today after a good caining on the way home. It is like the system just over pressurises but have replaced the cylinder head and gasket so gasses are not leaking into the cooling system.
My blue coolant cap always leaked coolant once I parked up. I noticed it was missing the rubber seal.
I fitted a black coolant cap off my other mk2 (which was running fine) and my core plug decided to let go with all the pressure.
I already replaced a core plug on this and now another has leaked where it was weak.
I can't understand how these coolant caps let out pressure? Is there a way to have a pressure relief built into the system and can it be found on another vag model?
I know the blue ones are the better ones but why have all my other mk2's been ok with the black one?
Annoying :angry:
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i understood that the black ones did not have a pressure relief valve or faulty whereas the blue ones had a good valve. never had a problem with a blue one on my kr.
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Thats very strange you shouldn't ever really blow a core plug.. As you said the system is definitely running high pressure.. Maybe buy a new blue one with seal
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Did you seal up the new core plug? Reallllllllll goodddddddd? :grin:
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The new core plug has been fine. Its the next core plug thats gone.
New blue with a seal time. The plugs must have been badly corroded and finaly let go due to topping up with water when the cap leaked out my nice pink coolant. :evil:
Hope its not an engine out job :angry:
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Something is impeding the flow of water I reckon. Thermostat faulty + not opening? Radiator blocked?
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Your core plugs sound like mk4 coil packs once one goes they all start going :grin:
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deffo like mk4 coil packs :grin:
new thermostat, water pump, radiator. Change the lot tomorrow hopefuly as they must all be corroded!
Guessing its just the three cores at the back of the block?
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Just had to do the water pump recently aswell it started to rumble thought it was alternator changed it out no difference so must be water pump :cry:
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Not sure whether 3 or 4 core plugs might be worth getting them done for peace of mind
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Had a similar issue with the wife's 8V - minus the core plug issue....
Stuck on a Brand New Bottle & Blue Cap - All Sorted...
Seems the "Round Coolant Bottles & Caps" Have an issue and need replacing every now ant then....
Pre 88 models with the "Un-pretty Square Bottles" Last Forever and dont need replacing...
One Mod - VW Cocked up on with MK2's...
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Thats right Ken it seems to be these round coolant tanks.
We couldn't get enough swing on the hammer so engine out.
Once an engine is out its always worth tidying up eveything so started out with the plugs now its...
Paint / underseal bay area.
Wrap the loom
Fit new bushings and gaskets
Clean out all lights (Thom gave me a good tip)
powder coat the cross member etc...
Change gearbox flange seals
What turned out to be a couple hours is now well into a few days work.
(http://i716.photobucket.com/albums/ww170/golfgti_photos/IMG_1136.jpg)
(http://i716.photobucket.com/albums/ww170/golfgti_photos/IMG_1137.jpg)
:evil:
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Block is crying for some paint ! :evil:
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Yeah i remember changing the Big Square coolant tank on my 88 16v ,
Put 1 of those small round ones on and it kept overheating an bubbling all over the top,
Had 2 put the big 1 back on and it was fine then,,
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When was the water pump last changed?
Heater matrix could be a sign its on its way out due to blockages?
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Engine had a top end rebuild 2 years ago and water pump is about 1000 miles new.
I've always had this over pressurising issue and I replaced the gasket as it was fairly easy.
Heater matrix has always blown nice and hot and doesnt leak. I did suspect this at first but it works so can't see the point to replace it. + it looks like another chore so don't know if I should replace it! :undecided:
back of the block has been painted now btw. Including chassis legs :evil:
Also changed the gearbox flange seals and noticed the tapered washer is broken. Lots of work!
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Does this mean you will actually open the bonnet at shows? :grin:
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Does this mean you will actually open the bonnet at shows? :grin:
I doubt it :shocked: his bonnet pull is attached to his wallet :lipsrsealed:
Thom
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Thom everything is expensive down south!
LOL you bar stewards :grin: