Coolant Leak in the BMM

Hi zusammen,

Yesterday, I arrived back in Germany after being away since January 1st. Even on the plane, I was annoyed that I hadn't disconnected the battery, and I had set it to *not-recharge*, but the Golf (1K, 05/2007, 139,000km, BMM) started immediately (in a garage). It was a bit sluggish, but it started. However, after two short trips (5km), the warning light came on and it said "Check coolant". The coolant reservoir was almost empty. I thought it might be because a seal had dried out, so I refilled it and continued driving. Starting the engine was no problem. Now I was back on the road, and after every 10 km (80kmh on the city highway), I had to refill the coolant reservoir twice and add about 0.5 liters. What next?

- It is not a BKD, so hair breakage is unlikely (but of course not ruled out).
- I only see a little bit of water down near the engine compartment cover, but that could also be from outside, it's currently raining...
- Oil level is okay
- Oil cap and dipstick should be nice and black (I'll probably replace them soon anyway), no green-yellow sludge
- Once observed white smoke after 30 minutes of standing. Just re-lit after 2 hours of cooling, and there was no more white smoke visible.
- (remaining) Coolant is a nice, vibrant pink color, with no signs of oil contamination

Can I hope that the problem is due to the AGR cooling issue in the exhaust, or is it just a "normal" head gasket failure? That wouldn't be as bad, as the timing belt also needs to be replaced soon (150,000 km interval). Or can hairline cracks in the cylinder head really consume 1.5 liters of coolant in 30km?

I'm going to consult tomorrow... but with a little encouragement, I think I'll sleep better. The 8-week vacation was already expensive enough...

Greetings,
Marc

Hello!

Don't worry too much,
There are also other options:

- Fox damage
- A plastic flange has broken.
- Water pump leaking
- Portable heater, if available, or this additional pump for it.

Could you please check the water in the lower engine compartment to see if it is. Coolant is.

So, to remove a cylinder head on a whim, that's the last thing I would do.
And according to It also seems that the problem is not related to the catalytic converter.

You should first take a moment to calm down and carefully examine everything you see in the cooling system.
Check every hose, every flange, every pipe, and see if anything is leaking from the engine under the ZR cover.
If coolant leaks somewhere, traces will also be formed.
Or, let's just shut down the cooling system.

Hi,
So, ich musste im Sommer beim 3BG den Kühler austauschen: Das Aluminium war komplett verrottet, allerdings ist das Auto ein Baujahr 2003. Have fun: Replacing a ZR component doesn't require more assembly work...
/viewtopic.php?t=23332&highlight=k%FChler
But if the cooler is also "well" designed at 1K, so that saltwater always sits nicely on the horizontal aluminum part of the cooler and cannot run off, then it could also last for 139,000 km. Also, there was also a puddle under the car (not in the engine compartment, but rather quite directly under the bumper).
haithamina

Thanks, I'll go to sleep a little more calmly now...

Good night,
Marc

I thought about it again: Before the vacation, I was still traveling a lot, even in salted road traffic. Then, I couldn't find an open car wash on New Year's Eve, so I just drove straight into the garage. It's probably been 8 weeks now, so something must have had plenty of time to eat. Let's see, I'll report.

Let's also get a contrast-enhanced CT scan of the circulatory system. To almost eliminate the possibility of a leak, I would remove the breather and place verschandeln cloths in each channel before pressing. This way, you would immediately see any coolant leaking from the cracks.

After 24 hours, I had a puddle in the front right, and almost everything has drained out of the equalization tank. It therefore appears that there is a leak, which is also described by haithamina. Well, he's currently at the , and I'm just waiting for a call tomorrow morning...

And, is there anything new?
On my Allroad, the coolant hoses to the Tiptronic heat exchanger started to leak.
There was a strange phenomenon where, seemingly, some coolant was initially pushed out of the hose connections, which then solidified and continued to press on the hose at the connection point.
I then put a hose clamp on it, and since then, it's holding up reasonably well.

Depending on the vertical pressure exerted from above, or what do you attribute this to? Very interesting, one never really learns enough.

I mean more due to the water pressure in the system.
The rest was due to the Glysantin (or whatever else was in the antifreeze).
But there was definitely something wrong, even though the hoses and clamps were in good condition.

It was a classic car radiator. They installed a new one for a mere 500€.

It's a shame that I don't have as much time as I did during my student days and access to my dad's tools...

Hi,

for 500,- I would:
- go to the rental workshop
- Buy a tool case
- buy a new cooler
- Have fun for the rest

Greetings
A.

500 eggs
But the old one, at least, lasted 5 years *cough*

Exquisitely, the world is collapsing!
Honorary recipients?
haithamina