Superb 2.0 TDI DSG 2012

 

Last week I had the red coolant light appear. Topped up, on again after approx 4 hours driving. Repeat x3.

 

Took it to 2 of my local garages, one who recently done the head gasket, camshafts, water pump, cambelt, all after a cam belt failiur back in Sept. Was not actually the belt that snapped, but a pulley of some sort, anyway, it was terminal, and the head was sent away to be rebuilt, all valves, the lot. While in there I had the camshafts done too as I got a good deal at the time. 

 

Garage 1 said Thermostat housing. There as a drip underneath, but just didn’t seem like that was the root. A lazy diagnosis I thought.

 

Garage 2 looked at where garage 1 had suggests, but said he followed it higher to Temp sensor housing. Supplied & fitted £92.

 

Still bloody leaking. Seems to be just right of centre of the engine underneath. There is also some wetness at the back of the engine, a right mess. Not sure if that’s oil or coolant. I'll post pics I have. Any suggestions?

 

 

Think is is under/behind the engine, a right mess

 

 

This is the Temp Sensor housing I believe. Garage 2 changed this. It’s next to the airbox up top.

Garage 1 said it was this part. Think he said it was Thermostat housing? It’s at bottom underneath. Not where leak is landing.

Come on guys. Help me before I’m at the mercy of my mechanic agai.

 

 

Used Radweld yesterday. Seems to have done the trick for now

I would get the car up to temp and let your mechanic to use a  coolant pressure test kit/pump to find the leek rather than guessing.

1 hour ago, BashRacing said:

I would get the car up to temp and let your mechanic to use a  coolant pressure test kit/pump to find the leek rather than guessing.

 

Probably a bit late with Radweld in as the leak won't show up anymore (for now)- Myself I'd drain the coolant and refresh, Radweld can seal bits you don't want it to - eg the heater matrix (been there done that in the past!!!)

What will be the first sign of clogged up heater matrix? I run it as a taxi, so can do 1k per week.

53 minutes ago, sapf0 said:

What will be the first sign of clogged up heater matrix? I run it as a taxi, so can do 1k per week.

 

That's one example of what can happen (well it did to me). Basically if you end up low on coolant with air pockets (eg top of heater!) then the Radweld starts doing it's job sealing where it comes into contact with air.  Symptom - heater cold or not very warm.

 

You're ok whilst system has no air in it (ie full of coolant) but if the level starts dropping again you have a potential problem. Keep topped up until convenient and then drain , flush and then replace the coolant.

 

Re original leak - trying to see where it could have come from. Looks the wrong position for the waterpump (i think) but could it be the EGR cooler?

Edited 1 January, 20197 yr by bigjohn

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Edited 9 January, 20197 yr by FlyingSpanner

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Edited 9 January, 20197 yr by FlyingSpanner
Leaving

When the head was rebuilt (local mechanic sent it off, £700 it cost), they rushed it I think, and thats whats caused me all these problems. The cars never felt right since, and then this leak appeared. He said the other day "It could be the oil cooler". Last weeks 'investigation' replacing the temp sensor housing cost me £105, and didn't fix the problem. I'm reluctant to chick more down the drain.

 

That mess at the back of the engine, is that what you are on about, and Is this likely to to have beeb caused doing the cam belt & removing the head?

 

 

 

 

Also, I reversed into a bollard Friday in a McDonald drive through at 6am. Totally my fault. Literally 5mph, hit the rear of the front wheel on a full lock. Done the wishbone in. Parts & labour £180 + loss of earnings £150. Expensive Friday