GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Craigwilson on 18 December 2013, 15:48
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(http://i1209.photobucket.com/albums/cc388/craigwilson2/14192946-6893-4AC3-9971-80B04ECCBFD6.jpg) (http://s1209.photobucket.com/user/craigwilson2/media/14192946-6893-4AC3-9971-80B04ECCBFD6.jpg.html)
I've mentioned this before but look at how much the radiator pipe has swelled under pressure
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What the pipe expanding under pressure?
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Could there potentially be a partial blockage somewhere causing the pressure to rise? Is it just that pipe?
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Time to check the head gasket!
Thom
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it's only that pipe and the bottom radiator pipe that expands, and it only does it when the blue cap is on the black cap just boils over.
the water temp sits at half way, the heater is very good and the oil temp sits about 102-106 and never breaks 112 even when driving it hard. head gaskets good, just done an oil change and thermostat oil was still clean when it came out and there was no sign on white residue.
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Does water trickle into the expansion tank?
Where the the small pipe feed from rad to expansion tank?
change the small pipe and take off the expansion tank and stick a pipe cleaner on the plastic outlet make sure its clear of any debris. Test and come back running two parts holts cleaner through the whole system is not a bad idea aswell. Then run a water hose through the whole system and try and flush out any sh!t in the system once holts cleaner has been ran up to temp for awhile.
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I didn't notice it trickling through that small hose however the small hose doesn't get very warm Atall not compared to the other hoses that you can't touch for more than a second or 2
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latest update......
(http://i1209.photobucket.com/albums/cc388/craigwilson2/1A6D8DA7-84DD-4EF2-BC86-E894AEA61304.jpg) (http://s1209.photobucket.com/user/craigwilson2/media/1A6D8DA7-84DD-4EF2-BC86-E894AEA61304.jpg.html)
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Time to check the head gasket!
Thom
I 2nd that. once you fix the hose try running the car with coolant cap off. if you see constant bubbling in header tank then your gasket is most likely gone. or maybe the hoses were just rotten? was problem there before thermostat change?
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no because before the stat change the water temp was always cold and I used to run the black cap, but after the stat change the water gets too warm for the black cap and boils over so I put my blue cap on and it does boil over it just pressurises
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I butchered the hose to make it fit, just to get to work and back, and there is no bubbling in the expansion tank just the trickle from the return hose
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That small return pipe is essential to relief pressure the diameter flow is small so any debris and calcium build up will create pressure. Like I said the pipe is a quick and small fix and it should make a difference in the balanced equalised pressure in the system. You should see steady flow when pressure builds up or temps.
Upto you now can't give you anymore advice until you sort out holts cleaner and small pipe and clean out expansion outlet?
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well my return hose definetly isn't blocked (swapped it with my old mans) and I've replaced it with a hose from a mk3 which was too long therefor cut and joined it with a bit of plastic pipe until my replacement comes from vw heritage. could the old hoses just be dead, it's only the rad hoses that swell and there the only ones that are still 20 years old,
but everything I releve the pressure in the tank it builds back up again after driving it again but it doesn't bubble on idle the level just drops when you rev it then it returns up again
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I got a samco kit for mine after blowing a hose a few years back. Replacing one hose will just mean pressure will move to next weakest pipe etc
I assume the temp guage is remaining in middle all the time?
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temp gauge never above never below when car is up to temp and I've ordered a samco kit for it now
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Quite high temp that 106
Just duff pipes. Get a full set of new pipes and a strong mix of coolant.
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it's ran at 106 since I done the 270 cam etc
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Think my head gaskit is now shot, water just dissapears out of the car with no leaks and when the car is idling with the cap off is just splashes out of the expansion tank
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Think my head gaskit is now shot, water just dissapears out of the car with no leaks and when the car is idling with the cap off is just splashes out of the expansion tank
Never!
Thom
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Water cant just disappear, if headgasket is properly gone itll be mixing oil in water or water in oil.
And yes water will splash out of expansion bottle with the cap off normally
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someone explain why my compression is 135-150 in all 4 cylinders ? the engibe was rebuilt 3 years ago.
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made a mistake, here is my actual compression results
1: 215 psi 14.8 bar
2: 213 psi 14.7 bar
3: 210 psi 15.5 bar
4: 215 psi 14.8 bar
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nothing wrong with them readings. im guessing the head was skimmed a lot. that's the kind of readings I was getting with my old golf with 2 litre bottom end and standard cam and head.