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2004 Volkswagen Jetta Sedan GL 4dr Sedan Manual

2004 Volkswagen Jetta Sedan
Trim Info:
Front Wheel Drive, 4 Door Sdn, Compact
24 mpg city / 31 mpg hwy
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May 27, 2013, 7:18 pm

Nico R
 

Question: Coolant leak underneath the car coming off the oil (pan?) area passenger side.

Recent work done:
1. Fixed radiator hose leak from the OEM nipple on the driver side. (new hose attached)
2. Coolant Expansion Tank upper nipple ruptured at the connection between the tank and the hose. Replaced tank and re-attached hoses.
3. Re-filled with coolant and noticed there is a leak underneath the car passenger side dripping "off" the oil pan area" (ONLY when the engine is running) - NO LEAKS when the engine is off or even while the car has been left sitting for a while.

I'm not sure what to do / repair or if I should take it to the mechanic.

Also car doesn't over heat just leaking coolant

Any advise would be great!


June 8, 2013, 11:15 am

Elizabeth K
Expert Mechanic

When the engine is running and warm, the coolant is under pressure--so it makes sense that it would leak only then. To figure out where it is leaking from, you have to visually locate it. Mechanics usually have a trained eye, and if they can't find it they have a tool to pressurize the system when the engine is off, to make it easier to spot. Unfortunately, knowing where it is running off the engine at the bottom can be very misleading.

If you already had a shop work on this, take it back there because the repair is not complete. If you worked on it yourself, double-check all your work and get under there with a flashlight when the engine is hot to find the leak.


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