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Author Topic: Mysterious loss of coolant  (Read 40508 times)

Chris

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Mysterious loss of coolant
« on: January 17, 2010, 09:49:12 pm »
My ccolant level drops for no reason, not all the time but every couple of weeks. cant see any visable leaks so any ideas
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Offline pako88268

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Re: Mysterious loss of coolant
« Reply #1 on: January 17, 2010, 10:48:52 pm »
Quote from: Chris on January 17, 2010, 09:49:12 pm
My ccolant level drops for no reason, not all the time but every couple of weeks. cant see any visable leaks so any ideas

Have a look at your oil? if you can see some slimish liquid in the cover!
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Chris

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Re: Mysterious loss of coolant
« Reply #2 on: January 17, 2010, 10:57:41 pm »
Oils fine, checked this morning
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Offline Top Cat

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Re: Mysterious loss of coolant
« Reply #3 on: January 17, 2010, 11:02:55 pm »
This has happened a few times to Mkv's or similar on here Chris. I will try and dig out the related threads for you tomorrow when i get a moment.
There is a chap on here called AlanD who defo has had this same problem if you want to give him a PM.  :happy2:
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Chris

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Re: Mysterious loss of coolant
« Reply #4 on: January 18, 2010, 06:27:53 pm »
Cheers

Did a head gasket test earlier and everything is hunky dory in that respect. theres no visable signs of leakage anywhere.
level seems to be ok for a week or so then suddenly drop overnight.

leveing paper under the car tonight in the garage to see if anything drips
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Offline mortygttdi

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Re: Mysterious loss of coolant
« Reply #5 on: January 18, 2010, 06:38:58 pm »
Dont know if the GTi suffers the same porous head problem has the 2.0tdi but I have the loss of coolant every few weeks??? no visible sign of loss on the floor and no water round or near the header tank :rolleye:

Darren
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Offline danishmkvgti

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Re: Mysterious loss of coolant
« Reply #6 on: January 18, 2010, 06:42:03 pm »
I had a leak with the front coolant hose going up between engine and coolerfans comming from the cirkulation pump
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Offline bigbo

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Re: Mysterious loss of coolant
« Reply #7 on: January 18, 2010, 09:19:29 pm »
i seem to have the same problem with my GTI. ive got through a bottle from the steelers in the last 6 months by topping up  :confused:
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Offline AlanD

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Re: Mysterious loss of coolant
« Reply #8 on: January 18, 2010, 10:38:41 pm »
TC is bang on the money, I indeed had the same problem.

If you are losing coolant and it constantly requires topping up (in my case every 3 - 4 weeks)  this could be because there a leaking flange (tell me you didn't giggle when you read that . .  :grin:) where the coolant goes into the engine and all that (technical description there).

It is covered under warranty or (in the case of VW Croydon) cost £180 inc labour and parts. This has been the case for a few people I know who have had MK5s.

Attached is a copy of the invoice for the works carried out which might be of help:



Any other questions bitches !?
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Offline Top Cat

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Re: Mysterious loss of coolant
« Reply #9 on: January 18, 2010, 10:49:23 pm »
We might be beatches, but we aint got a leaky flange.  :P
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Offline mortygttdi

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Re: Mysterious loss of coolant
« Reply #10 on: January 19, 2010, 06:09:39 am »
 :grin: :grin: :signLOL: My car is at the bl**dy body shop so cant check it, but once I get it back you know after ive fitted my auto levelers for the xenons ill be stripping the front of the car down to see if there is any water crystalising(sp)

Where should i be looking Alan? Cos I could do with ruling out the dreaded porous head problem :happy2:

Darren
« Last Edit: January 19, 2010, 06:13:50 am by mortygttdi »
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Offline RedRobin

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Re: Mysterious loss of coolant
« Reply #11 on: January 19, 2010, 03:02:46 pm »
....

I had the same slow leak problem and also always have dry cardboard under my engine bay on my garage floor to be able to easily see any drop of fluids - No coolant drops evident.

Turned out to be the seal on the engine as AlanD's but my VW dealer didn't charge me as much his and mine had to remove and reinstall my Forge Twintake as well.

Signs of leakage would be on DSG box if you have DSG.

It tends to happen in a cold spell if you don't drive for a while - When the engine is warm it effectively seals the faulty seal by expansion. 
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Offline TomB

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Re: Mysterious loss of coolant
« Reply #12 on: January 19, 2010, 06:12:51 pm »
Mne had a phase of losing coolant but found out that was my rad.

My old TDI used to do this, took me months to work out.  Turns out my water pump had gone.
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Chris

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Re: Mysterious loss of coolant
« Reply #13 on: January 19, 2010, 06:59:21 pm »
No ive goy no drips either, cars manual but had a good look round and cant see s**t lol

but thanks for the info will look into it
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Chris

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Re: Mysterious loss of coolant
« Reply #14 on: January 21, 2010, 06:12:33 pm »
quick update

had ahead gasket test done yesterday and givern the all clear phew !
anyway today i had a pressure test done on the cooling system, and yes i can now verify that my car has exactly the same problem as ALAND's

part was ordered today and getting it fiited Monday

Many  thanks for all the help  :happy2:
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