#1: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: nethany, Location: ReadingPosted: Sun Jan 02, 2011 5:02 am ---- Hi All
I have sprung a small leak as seen in the image below on my '99 gti 138. The pipe its coming from is at the back below the thermostat. Its a pig to get access to it but do you guys have any tips to fix this?
Can has not overheated to a point when it goes into the read or even above 100 degress so hopefully i found the issue before any real damage. If i fill up the coolant and run the car for 30mins it sits there around 90, but eventually the coolant does come out..
thanks
#2: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: mattievrs, Location: LeicesterPosted: Sun Jan 02, 2011 5:07 am ---- As the coolent system is pressurised the only fix is a new hose mate. Find someone breaking a gti would be the easiest way.
#3: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: tomd0801754, Location: MoscowPosted: Sun Jan 02, 2011 5:08 am ---- I can only think of patching it up with some rubber bonding agent. However by the time you have faffed around would probs be easier going down to the local scrappy and just replacing the pipe.
#4: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: Geoff, Location: Evesham, WorcestershirePosted: Sun Jan 02, 2011 5:09 am ---- Puncture repair patch and a jubilee clip would fix it in the short term.
#5: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: nethany, Location: ReadingPosted: Sun Jan 02, 2011 5:11 am ---- if it was a rubber hose i would have changed it all ready but this thing is metal and drops down behind the engine and would be a pig to replace..
thanks for the sugegstions...
#6: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: tomd0801754, Location: MoscowPosted: Sun Jan 02, 2011 5:13 am ---- Really? Looks like is coming from the bottom rubber hose underneath.
#7: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: mjsroofing, Location: south walesPosted: Sun Jan 02, 2011 5:19 am ---- dont forget that if the water system is not under pressure you can risk boiling over as water boils at 100 degress but while under pressure i think it boils at around 126 degress.
new pipe to be safe mate.
#8: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: nethany, Location: ReadingPosted: Sun Jan 02, 2011 5:27 am ---- aye the bottom pipe is metal.. the other two connecting to it are rubber..
#9: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: kieron, Location: in the housePosted: Sun Jan 02, 2011 5:33 am ----
nethany wrote:
aye the bottom pipe is metal.. the other two connecting to it are rubber..
thats correct its a steel pipe and its most probly rotted away abit.
a temp repair you could do is "sleave it" by that i mean put a rubber pipe over the hole and 2 clips over the pipe like a sleave it would hold for some time if done right
#10: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: nethany, Location: ReadingPosted: Sun Jan 02, 2011 5:48 am ---- many thanks again for your help guys...
#11: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: Edward, Location: In the garagePosted: Sun Jan 02, 2011 6:32 am ---- It's the pipe where it joins the thermostat housing. I doubt the pipe has cracked but you never know...I'd just get three new seals and a thermostat housing seal as I think it needs removing from the head to pull the pipe out of the back of the water pump.
The 2x rubber ring seals fit on the end of the pipe where it sits in the thermostat housing. It's a tight fit and best to lubricate the seals when slotting them back into the thermostat housing.
#12: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: nethany, Location: ReadingPosted: Sun Jan 02, 2011 8:16 am ---- Hi Edward, thanks for the post. I have taken out the batter to get clearer access and it does seem to be coming from the seals into the thermostat housing. Any idea of the correct procedure to remove the pipe?
appreciate all your assitance and everyone else who haved helped this morning..
#13: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: Edward, Location: In the garagePosted: Sun Jan 02, 2011 10:16 am ---- Best way to do it is remove the thermostat housing and pull that to the side while also pulling the metal pipe out of the water pump housing (lots of coolant will spill out), also unclip any wiring that's attached to the coolant pipe.
The two seals hold the pipe in the thermostat housing quite tightly so once you've also removed the metal clamp at the back, spray some WD40 into the seals to help loosen them.
#14: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: Luke, Location: LeedsPosted: Sun Jan 02, 2011 10:26 am ---- You may as well use the time to do a full coolant change if you haven't done one recently. It's all too common to overlook coolant changes, but they are needed every 20k or so, or every couple of years.
#15: Re: Pinhole leak on coolant pipe - quick and easy way to fix ? Author: Edward, Location: In the garagePosted: Sun Jan 02, 2011 11:52 am ---- Doing that job you'd have no choice in changing the coolant.
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