Coolant Leak

[Bee8point5]

My '14 B8.5 started slowly dripping coolant [i.e. from the max line to the min line in a month] now that same spread is down to 1 day.

Mileage is 124k kilometers.

Would that be the connector at the back of the engine by the high pressure fuel pump or the water pump failing do you think?

I am away this week on travel and will attend to this shortly but I don't want to roast my cylinder block? Because the B8s didn't have low coolant MILs [not that I'm aware of anyway] could I risk completely effing up my car if I drove it down at the min line for say 85-90 kilometers on a 110km/h highway do you think? Or would you risk destroying the engine if you like had basically no coolant i.e. nearly none left in the overspill container?

[marshallnoise]

Best thing you can do is head to Princess Auto (or whatever is your Harbor Freight equivalent) and get one of these:

https://www.harborfreight.com/radiat...t+pressure+kit

I have used it TONS of times. Great tool to have and affordable.

Once you add 15-20 lbs of pressure, you should be able to see where it is leaking from.

[Theiceman]

I'd say likely water pump. should be able to see with a good flashlight

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[Allowencer]

Best thing you can do is head to Princess Auto (or whatever is your Harbor Freight equivalent) and get one of these:

https://www.harborfreight.com/radiat...t+pressure+kit

I have used it TONS of times. Great tool to have and affordable.

Once you add 15-20 lbs of pressure, you should be able to see where it is leaking from.

100% this. You can test without having to warm the engine to temp too.

Sent from my SM-N976V using Tapatalk

[MongoMcG]

As iceman said, history of the model and current milage predicts water pump or union to the oil cooler as the location of the leak. It's probably time for preventative maintenance, replacing the pump and union (new OEM pump causes least headaches), even if the leak repair is elsewhere.

I had similar timing of coolant loss, and it was due to a little bubble weld on the air conditioner condensor rubbing on the radiator after the new Wagner FMIC was installed.

[Raj1471]

Has water pump ever been replaced? Had to replace '14 allroad water pump under the same circumstances when it had 81k miles. Agree with Theiceman and MongoMcG...imo stick with the oem Audi water pump...heard of problems with the all metal "upgrade".