Tip & How-To about Volkswagen Jetta

Engine coolant leak

There are no coolant lines etc running on the lower part of the engine.Usually water will leak from above and run down finally dripping from under the engine. Coolant will not leak from the "engine" it leaks from a hose or thermostat housing.


Start from the top and work down. Check each hose by feeling with your hand. Look for a wet spot. wipe the hose with a cloth to clean if necessary. If you think you found it dry the area and check again.Sometimes you need to move the hose around to open a small tear and expose the leak source.

Tip: park overnight on a piece of cardboard. Look for the spot where it is dripping. This will give you and idea where to look.

If a hose leaks around a clamp tighten the clamp. Screw clamps can be tightened. The spring style can not. Once moved the spring type often leak. If moved try moving to the exact position it was in using the impression left on the pipe. I could suggest though that your replace it with a screw type clamp.

If you find a torn hose you may be able to disconnect, cut the end and reattach. If too short replace.

Check where each hose connects to the engine. This will be the thermostat housing and the heater supply line. If a housing is leaking try gently tightening (careful they crack). Or replace the gasket. Use a new gasket do not just use gasket sealer.

Check at the radiator. There will be a heat sensor there. They screw into the radiator. If it is leaking try to gently tighten (take care you can break it). If that does not work remove the sensor and put Teflon tape on the threads. That should do it.

If you don't see a leak at all. Start the engine and run. This will build pressure in the cooling system. Look for leak using the same process. Careful as the engine is hot.

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1 Answer

water leak drips on leftside but is not from water pump. seems to come from back side and runs tword the front, shows wet down low and in back close to firewall.


There is a metal pipe on the back head that has coolant in it going to the heater core. Also there are also small rubber hoses (2) on the driver side toward the rear of the engine. Run your hand under the above listed items to see if you can feel coolant. If the above don't show any leak then it could be a head gasket leaking to the outside of the engine. Good Luck

Aug 31, 2010 | 1999 Cadillac DeVille

1 Answer

water leaks onto floor board from Air Conditioner, where is the air condition relief opening, I am sure the drip line is clogged.


caused by water running out the drip line and not falling off the drip hose due to improper angle.Water will run back down the lower outside of the hose and into the cabin.
Fixed my T&C by putting a tight rubber O ring on the engine side of the drip line neat the tip. Water will hit the O ring and drip off properly.

Jun 11, 2010 | 2005 Chrysler Town & Country

2 Answers

2002 dodge caravan leaking coolant looks like from under engine


There are no coolant lines etc running on the lower part of the engine. Usually water will leak from above and run down finally dripping from under the engine. Coolant will not leak from the "engine" it leaks from a hose or thermostat housing.

Start from the top and work down. Check each hose by feeling with your hand. Look for a wet spot. wipe the hosed with a cloth to clean if necessary. If you think you found it dry the area and check again. Sometimes you need to move the hose around to open a small tear and expose the leak source.

If a hose leak tighten the clamp. If torn hose you may be able to disconnect, cut the end and reattach. If too short replace.

Check where each hose connects to the engine. This will be the thermostat housing and the heater supply line. If a housing try gently tightening (careful they crack). Or replace the gasket.

If you don't see a leak at all. Start the engine and run. This will build pressure in the cooling system. Look for leak using the same process. Careful as the engine is hot.

Adrian

Mar 07, 2010 | 2002 Dodge Grand Caravan

1 Answer

big coolant leak under passanger side


From your information it sounds like the water pump is bad. The coolant is running down the engine and dripping off of the oil pan.

Nov 29, 2008 | 1994 Chevrolet Caprice Classic

1 Answer

leaking coolant under engine/dripping from side engine


Check the water pump, it is the most likely cause, the coolant will run down and drip in places far away from the leak.

Sep 10, 2008 | 1993 Isuzu Pickup

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