Coolant leak


Asked by Mar 02, 2017 at 02:17 PM about the 2003 Volkswagen Passat GLS 1.8T

Question type: Maintenance & Repair

I have a 2003 Volkswagen Passat that I believe the
heater core leaks but while I was looking at the
hoses I noticed a lot of rust and corrosion at the
mounting position of the hoses could the hoses be
leaking from rot I mean I do smell the coolant
inside of the car I'm just trying to make a easier fix
rather than an 8 hour heater core job

5 Answers


get autozone to pressure test the system...may be a small leak . if small, stop leak usually does the trick make sure to follow directions


don't use stop leak ,it's made to plug small holes and thats what your coolant system is . The connections are corroded because there getting wet from coolant that could be coming from nearby , definitely somewhere ,, you need to take care of the leak thats how you fix it .,


Stop leak has been used for a hundred years... like I said follow the directions


It has been used a long time, though it is temporary. If you plan on keeping the car a few more years, best to just replace the core and hoses and do it right, if you just want to get by, can't hurt to use it. When you do want to fix it right, you will need to flush the cooling system to get all the gunk out.


if its your heater core and most likely it is since you smell antifreeze while driving then they are a total pain in the butt to change put the powdered aluminum in if you have an aluminum radiator or the cooper colored stuff if you have a brass radiator and drive on !

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