MK4 Golf GT TDi (Water coolant level keeps dropping)

DJMK4 · 4 Jul 2009 at 16:05

I keep getting levels dropping in my water coolant tank which makes the dash icon flash up.

Whats the best way to takle a leak if there is one?

Lopéz · 4 Jul 2009 at 16:15

I'd suggest finding the leak (if there is one) first. It's a bit difficult to answer your question otherwise.

Dangerous Dave · 4 Jul 2009 at 16:53

A common fault on the MK4 Golf is with the coolant bottle lid seals going causing a slow but steady leak under pressure, cheap fix to rule this out.

After that my next port of call would be the radiator and pipe work. The early MK4s are heading for 10 years old so not unusual that the radiator may be rotten/damaged by stones etc.

After the radiator/pipe work I would start looking at the waterpump if its not been changed for a while they can also leak.

miniyazz · 4 Jul 2009 at 18:44

Can you not break an egg into it? That can permanently seal small leaks, IIRC.. I may be missing small details like take out the yolk first, I can't remember properly

DJMK4 · 4 Jul 2009 at 20:15

Thanks for the info guys, i shall take a peek when I get a chance.

How the hell does an egg fix a leak?? never heard that one!?lol

The Edge · 4 Jul 2009 at 20:19

It does a similar job to radweld. Bars seal is better, it's like a giant oxo cube. I had a small leak on the zx which it fixed and lasted the remaining 8 months of my ownership.