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Old 01-15-2013, 08:12 AM   #1
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Question Coolant Leak On Ground

Hi Guys,

I have a coolant leak that is getting worse. 2005 car with the 1.6 auto. During the summer months it doesn't seem to leak anything on the ground but once the cool weather comes and she uses the heat there will be a small spot (the size of a quarter) on the ground every day. I need to top up the exp. tank every few days and if I let it go a week, the tank will be dry and naturally, little heat from the heater. Last year I spent quite some time under it and for the life of me could not see any signs of the leak. Before I look later today, does anyone have a an idea of a common area where they usually leak from?? I'm thinking either the thermo housing or a hose. It is leaking on the ground so I am eliminating a HG issue (no signs of water in the oil or white smoke). FWIW, the car has a tick over 100K miles on it.

Thanks!!


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Old 01-15-2013, 11:20 AM   #2
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We've got to figure out what this car is. The 1.6L engine was not offered in the NA market, are you overseas?

The 2005 Ford Focus has a thermostat housing, the thermostat is built into it, and it is located at the front of the engine block where the lower radiator hose meets the engine. Earlier Zetecs have a typical thermostat housing location at the rear of the engine where the upper radiator hose meets the engine. The 2005 Focus thermostat and housing costs about $100, so you don't want to change it unless you're sure what you're changing needs repair.

Where is the dime shaped drip under the car? Front side of the engine? Passenger side? Driver's side? Back of the engine compartment?
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Old 01-15-2013, 11:28 AM   #3
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We've got to figure out what this car is. The 1.6L engine was not offered in the NA market, are you overseas?
I had 1.6 on the brain....car has the Zetec motor. Just looked on the driveway and the puddle is the size of a silver dollar now and it is at the front of the motor. Fairly centered but perhaps slightly towards the pass. side.
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Old 01-15-2013, 11:45 AM   #4
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So it is not a 2005 YM? As of 2005, the Duratec is the engine, not the Zetec. The last year for the Zetec was 2004 MY.

The thermostat housing on the Zetec is on the driver's side, but there's no telling where things might drip down. I'm going to assume you know how to trace down coolant leaks, and you've looked all over. One time I had this problem, and it turned out to be the reservoir cap. It can either be loose, or not sealing properly, and that causes the overflow to leak while you're driving. For some reason, it didn't leak when I wasn't driving, although logically it should spew right after the car comes to a stop from latent heat.
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Old 01-15-2013, 12:01 PM   #5
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So it is not a 2005 YM? As of 2005, the Duratec is the engine, not the Zetec. The last year for the Zetec was 2004 MY.

The thermostat housing on the Zetec is on the driver's side, but there's no telling where things might drip down. I'm going to assume you know how to trace down coolant leaks, and you've looked all over. One time I had this problem, and it turned out to be the reservoir cap. It can either be loose, or not sealing properly, and that causes the overflow to leak while you're driving. For some reason, it didn't leak when I wasn't driving, although logically it should spew right after the car comes to a stop from latent heat.
I really should learn how to type numbers correctly--it is a 2004 model. Itis very dry around the res. cap.
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Old 01-15-2013, 12:07 PM   #6
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Hmm, well that would be the one with thermostat housing problems. The thermostat housing is where you'd expect it- back of the motor where the upper radiator hose meets the cylinder head. You might want to tightly shove some paper shop towels around in that area to see if you can pick up any leaking coolant that might be somehow making it's way over to the front of the engine.

The only thing that is up there on the front of the engine is..... shudder... the water pump. Those leak like other water pumps do- from the snout while the engine is running. You may or may not hear noises when the pump is going out because most of these pumps have plastic impellers. You should notice residue on the snout, and you might notice coolant seeping from it if you use a flashlight after driving the car around to warm it up, and then stop to check.
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Old 01-15-2013, 01:47 PM   #7
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Hmm, well that would be the one with thermostat housing problems. The thermostat housing is where you'd expect it- back of the motor where the upper radiator hose meets the cylinder head. You might want to tightly shove some paper shop towels around in that area to see if you can pick up any leaking coolant that might be somehow making it's way over to the front of the engine.

The only thing that is up there on the front of the engine is..... shudder... the water pump. Those leak like other water pumps do- from the snout while the engine is running. You may or may not hear noises when the pump is going out because most of these pumps have plastic impellers. You should notice residue on the snout, and you might notice coolant seeping from it if you use a flashlight after driving the car around to warm it up, and then stop to check.
O.K. that gives ma starting point. The Wife will have it back later this afternoon and I'llget under there and see if I can isolate the source. I'll write back--Thanks!!
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Old 01-15-2013, 01:48 PM   #8
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Best of luck.
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Old 01-15-2013, 05:04 PM   #9
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Best of luck.
O.K. found the genreal area. From the pics you can see that it is wet on the small hose going into a plastic looking fitting. It runs down the bell housing and then to the ground. I'd like to thin that it is just that small hose weeping but am doubting it. Suggestions??



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Old 01-15-2013, 05:49 PM   #10
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That would be the thermostat housing. Common problem fairly easy to replace. Dorman part #902-201.
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