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Old 03-10-2007, 07:38 PM   #1
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I have 2006 F53 with a intermittent coolant leak. I t only leaks when the RV is backed in my driveway. I can't pin point the exact spot of the leak because there is a large area that is wet. Any ideas?
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Old 03-10-2007, 07:38 PM   #2
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I have 2006 F53 with a intermittent coolant leak. I t only leaks when the RV is backed in my driveway. I can't pin point the exact spot of the leak because there is a large area that is wet. Any ideas?
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Old 03-11-2007, 03:36 AM   #3
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Is the front of the coach up or down when it leaks? Does it leak when parked level? Are you sure you are not overfilling the resevoir?
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Old 03-11-2007, 08:06 PM   #4
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Have you replaced the hose clamps with the screw S/S type? Fords had a problem with the hose clamps rusting out and breaking.
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Old 03-13-2007, 07:40 PM   #5
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You didn't give the miles on your rig. Often if it's intermitent, it's the water pump. You'll need a small mirror to check the water pump vent hole. The vent hole is on the bottom side of the water pump nose.

After the coach sets for a while and the presure is relieved in the cooling system, water will drain out of the bearing vent hole.

Hope this helps.
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Old 03-15-2007, 05:51 AM   #6
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I have had similar "intermittent" leaks in several vehicles I have owned in the past. Actually, the leaks weren't intermittent. They leaked pretty much all the time, but were slow enough that the heat of the engine kept the liquid evaporated while driving. When parked, the engine would cool down and there would be a small puddle on the garage floor in the morning.

As Diplomat Don says, take a look around with a flashlight and mirror. Check for rust stains especially around the water pump area.
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Old 03-15-2007, 10:10 PM   #7
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I assume you know it's coolant for sure and not the water from your air conditioner?

As it's a new coach I would also touch bases with your repair people if you don't find the source yourself.

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Old 03-16-2007, 05:48 AM   #8
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When I worked on my MH dash A/C, I bought one of those kits with a battery powered light and glasses for $35. You push dye into the A/C system, run it and then look for the tracks with the light while wearing the glasses. They show up really well.

The same company makes a dye additive for coolant systems. I'll bet that you can find all of your leaks with that approach. Another trick is to use carb. cleaner to clean off the area of the leak after you think you have fixed it so that you can see if it leaks again.

The company is called Interdynamics. I bought mine at O'Reilly's Auto Parts
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