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Old 09-08-2017, 10:17 AM   #1
Drag Racing Champion
B6JoeS4's Avatar
Drives: 12 CSG DSG 4D GTI
Join Date: Jul 2012
Location: Western Chicago Burbs
Posts: 63
Coolant smell but it's not the water pump! Anyone else have this leak?

Over the last few weeks I got that occasional whiff of coolant when the car is hot. Today I decided to poke around and try to figure it out and it looks like I found the culprit. I checked the water pump and radiator and no leaks there, I even have a brand new OEM coolant bottle and cap so I'm pretty sure the system is not over pressurizing causing the leak.

All of the hoses feeding the heater core seem to be leaking at the fitting. I can't find the part number for these hoses anywhere online. Has anyone else had this problem? I searched and it seems like my MK6 is the only one to ever have this.

The car is losing only a few ounces a week so this is a very small leak

83,000 miles on the car

APR Stg2 v2.4 || AWE intake || Cobb TBE || ARM FMIC || 034 Mounts || Depo LED's || Podi || Alzor Peelers || Eibach ProKit || R32 Brakes
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Old 09-08-2017, 10:34 AM   #2
FIA World Rally Car Champion
sauceman101's Avatar
Drives: 2010 UG GTI 6MT
Join Date: Aug 2012
Location: United States
Posts: 595
Replaced the top one when I broke the nipple off to the smaller line on the hard plastic connection. IIRC the part only comes as the hose with the connection to the heater core. Don't recall part number, ordered it over the phone through a local dealer so I'm sure I don't have the receipt either. Never touched the lower. You should be able to find the part number be looking through any exploded parts view of either the heating and cooling system for the car or the motors cooling system. Don't recall which these were in
2010 UG GTI 6MT: Peloquin LSD, APR Stage 1, DIY RSR Clutch, VWR Streetsport+ Coils, IE Camber Plates, 034M Front End Links, Hotchkis RSB, APR Stage 1+2 Carbino Intake, HPA Red Subframe Puck, Enkei PF01s wrapped w/ Star Spec 2s, AWE DP, [i] Magnaflow CBE, BIG things coming if you catch the drift
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Old 09-08-2017, 11:11 AM   #3
FIA World Rally Car Newbie
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Drives: 2010 MK6 GTI 6MT CSG
Join Date: Dec 2016
Location: UK
Posts: 474
Just had that top fitting replaced on my car, P/N 1K0122291C

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