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2004 Mercury Mountaineer ran hot so I found the poblem and replaced complete thermostat housing, thermostat, hoses,flushed and replaced antifreeze. Once put back together and refilled with antifreeze, I cranked it and let run to check for leaks. There are no leaks where the work was completed but there's a constant drip from a relief hose are something from underneath the vehicle. Please tell me why it would be leaking from there and how to fix this issue. Thank You

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Check the coolant resivoir for cracks , check return hose also radiator cap may not be sealing or not holding proper pressure . Replace cap , return hose ....

Posted on Jun 11, 2017


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Posted on Jan 02, 2017

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SOURCE: ATF is leaking out of the flywheel assy of my 99 Suburban 1500

if it is ATF then it is the trans pump or input shaft seal, these both require the removal of the transmission.

If it is coolant it may be a rear freeze plug, but this is rare and also requires the removal of the transmission

A more likley cause is a leaky intake manifold which is very common on the vortec v8 engines, it leaks at the very back and runs down the bell housing. this repair is a bit extensive but can be accomplished by a good DIYer given time, space and tools this repair is also the least expensive of the three, about $300

Posted on Nov 25, 2008

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SOURCE: running hot

Radiator Fan Control Relay Switch. I bet your electric fan doesn't run?

Posted on Dec 01, 2008

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SOURCE: Passenger side coolant leak 2004 chevy monte carlo

it is most likely coming out of the weep hole at the water pump or the plastic fittings on the water pump to upper intake manifold they are black in color ands are L shaped with O-rings

Posted on Apr 19, 2009

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SOURCE: 2001 Ford Windstar is leaking antifreeze

Could be water pump, radiator, freeze plugs, hoses, ect. try and isolate the area by putting a piece of card board down on the ground and line up what is above it. Garages use a pressure tester on the cooling system to see where the leak is. I would guess water pump,or small bypass hose

Posted on May 23, 2009

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SOURCE: 2002 VW Jetta 1.8T has a leak somewhere.Need diagram

Bring the car into a repair shop and have them pressure test it for leaks or you can purchase a pressure tester make sure you get the appropriate adapter for your cars radiator filler neck or resovoir, and check for leaks yourself. Make sure the car is cold and there is the appropriate mixtiure of coolant and water in the system, prior to pressure testing. Also do a visual inspection of the cooling system when the vehicle is cold and look for leaks.

Posted on Apr 15, 2010

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