MK4 Golf 20yrs old 20,000 miles keeps losing coolant!!
MK4 Golf 20yrs old 20,000 miles keeps losing coolant!!
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JimIsh1

Original Poster:

17 posts

74 months

Monday 24th August 2020
quotequote all
CAR GURU HELP NEEDED FOR DAUGHTER WITH TWO LITTLE ONES AND A SICK, OLD BUT VERY TASTY VW GOLF!!!
My daughter has a really low mileage (20,000), very good condition, but 20 year old mk4 Golf. One lady owner from new Really well maintained. Full VW service history. On a run a couple of weeks after buying it, it dropped all its coolant. Green Flag man ‘fixed it’ topped it up. Ran it’s nuts off at kerbside. No problem. Of she went. Couple of days later same thing. Then first garage fixed it. Topped it up. Ran great. Then if happened again. This time went to proper VW garage. Diagnosed it. Repaired it. New water pump and thermostatic valve. New cam belt etc. etc. £700 POUNDS later returned it to her with a clean bill of health and a glowing report.
Today, just days later, same again! Stranded in London traffic with two young children!! Greenflag again. Towed home.
There MUST be someone out there that knows what this is!!!
HELP PLEASE!!!



Scrump

23,943 posts

188 months

Monday 24th August 2020
quotequote all
Anything linking the events? Such as being stuck in traffic at the time. Any warning lights show up such as overheating warning?

I am wondering if the electric fan comes on when it gets hot.

GreenV8S

31,021 posts

314 months

Monday 24th August 2020
quotequote all
Where is the water coming out?


JimIsh1

Original Poster:

17 posts

74 months

Monday 24th August 2020
quotequote all
Just talked to daughter. Tends to happen (twice) at the end of a run when parked up Back at home. Latest was after some time in traffic. Temp gauge shows temp going up then alarm sounds!! Will post list and bill for repair by VW of work so far.

anonymous-user

84 months

Monday 24th August 2020
quotequote all
what engine is it?

rustednut

807 posts

77 months

Monday 24th August 2020
quotequote all
GreenV8S said:
Where is the water coming out?
This.

Until it is known where the coolant is escaping to/from it is impossible to advise.

Getragdogleg

10,230 posts

213 months

Monday 24th August 2020
quotequote all
If its a pd engine then they can suffer from water pump impeller falling off. This means that the coolant will not be circulating and it will overheat.

Sounds like this has happened and that's why you got a bill for the pump and a new timing belt, the pump is belt driven.

They can also get fan trouble, relay, switch even the fan itself.

Failing that then the head gasket I has gone or the head has gone porus and is pressurising the coolant until it comes out the cap.

My mk4 does all of this unless I drive it like miss daisy.

I don't care though as I'm only driving it a few miles a day slowly!


JimIsh1

Original Poster:

17 posts

74 months

Monday 24th August 2020
quotequote all
Pooling under drivers side wheel arch

anonymous-user

84 months

Monday 24th August 2020
quotequote all
JimIsh1 said:
Pooling under drivers side wheel arch
sounds like water pump, but as you haven't said what engine it is very hard to diagnose.

JimIsh1

Original Poster:

17 posts

74 months

Monday 24th August 2020
quotequote all
rustednut said:
This.

Until it is known where the coolant is escaping to/from it is impossible to advise.

mercedeslimos

1,889 posts

199 months

Monday 24th August 2020
quotequote all
Water pump. Thermostat housing. Coolant y-piece, EGR cooler the list goes on.

aka_kerrly

12,505 posts

240 months

Monday 24th August 2020
quotequote all
You need to get the coolant system pressure tested to find the leak, it might just be a dodgy clamp that is fine when the engine is cool and the coolant not pressurised but begins leaking once the coolant is >90*c


JimIsh1

Original Poster:

17 posts

74 months

Tuesday 25th August 2020
quotequote all
The Spruce Goose said:
what engine is it?
1.4 petrol. 1st registered 2000

JimIsh1

Original Poster:

17 posts

74 months

Tuesday 25th August 2020
quotequote all
GreenV8S said:
Where is the water coming out?
Below drivers side front wheel arch

JimIsh1

Original Poster:

17 posts

74 months

Tuesday 25th August 2020
quotequote all
[quote=Getragdogleg]If its a pd engine then they can suffer from water pump impeller falling off. This means that the coolant will not be circulating and it will overheat.

Sounds like this has happened and that's why you got a bill for the pump and a new timing belt, the pump is belt driven.

They can also get fan trouble, relay, switch even the fan itself.

Failing that then the head gasket I has gone or the head has gone porus and is pressurising the coolant until it comes out the cap.

My mk4 does all of this unless I drive it like miss daisy.

I don't care though as I'm only driving it a few miles a day slowly!

Thanks for reply. Fan is sounding like a candidate. Loses coolant after a run when parked back at daughters house or in slow traffic. Could it be intermittent though?

RSTurboPaul

13,106 posts

288 months

Tuesday 25th August 2020
quotequote all
Go for a 5 minute drive to get the temperature up then come home and park on the drive with the bonnet up.

Keep an eye on the temperature gauge.

The fan should come on at some point.

If it's not coming on, dodgy fan switch or connection, maybe - IIRC you can test fans by bridging the connections??

If it does overheat / start pissing out coolant, you can see where the water is coming from. (You can also jump in the car and go for a low engine speed / higher vehicle speed run to cool it down.)

Do not open the radiator cap when it is hot, shatever you do.

RSTurboPaul

13,106 posts

288 months

Tuesday 25th August 2020
quotequote all
Go for a 5 minute drive to get the temperature up then come home and park on the drive with the bonnet up.

Keep an eye on the temperature gauge.

The fan should come on at some point.

If it's not coming on, dodgy fan switch or connection, maybe - IIRC you can test fans by bridging the connections??

If it does overheat / start pissing out coolant, you can see where the water is coming from. (You can also jump in the car and go for a low engine speed / higher vehicle speed run to cool it down.)

Do not open the radiator cap when it is hot, whatever you do.

kev b

2,756 posts

196 months

Tuesday 25th August 2020
quotequote all
Why not take it back to the VW garage and ask them to fix it properly?

tight fart

3,594 posts

303 months

Tuesday 25th August 2020
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£700 to VW to fix a leak and it’s still leaking.

Getragdogleg

10,230 posts

213 months

Tuesday 25th August 2020
quotequote all
Drive it, reasonably hard for a bit until its up to temp.

Park it (running) on the drive, open the bonnet and squeeze the top hose to the radiator. If its rock hard and feels pressurised then you have problems with head/head gasket.

If you squeeze it and its firm but has a bit of "give" then its likely just a loose fitting or a fan issue. Take it back to the Garage who did all the work and complain.