Coolant leak - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 05-04-2006, 05:22 PM   #1 (permalink)
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Coolant leak

I have coolant leaking from somewhere, but I can't see where.
From under the truck I can see it coming around the balancer, but can't see exactly where, and can't get my hands in there to feel.
The seal around the water pump that I can see all looks good.
Should I assume that the seal is bad, and pull the water pump, or is there something else that you pros' recommend?

Thanks for your help and patience with a newbie.

Just checked the fluid on the ground again, and it's clear. Isn't the coolant supposed to be a reddish color?
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Old 05-04-2006, 05:32 PM   #2 (permalink)
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Re: Coolant leak

If its clear, does it have an odor to it? If it doesn't have an odor, it could be coming from the air conditioner. If it has the antifreeze odor, then it is probably leaking from the weep hole on the water pump. Although, it could be traveling down from the lower radiator hose where it connects to the radiator. If you have the Extended life coolant, then yes, it should be a pale red. The standard coolant (non-elc) is green, but can turn to a rust color over time.
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Old 05-04-2006, 05:54 PM   #3 (permalink)
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Re: Coolant leak

OK, I checked it with a napkin, and it is coolant.
A little more info.
This morning there was a small puddle. Drving around today, I checked every time I stopped somewhere, and there wasn't any leaks. When I came home and parked it, it was leaking, and is still leaking. It's not leaking real bad, but it is a steady drip.
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Old 05-04-2006, 05:58 PM   #4 (permalink)
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Re: Coolant leak

Unless you can see it running down the lower radiator hose, it is probably leaking at the water pump weep hole. One other place it could leak would be at the thermostat housing, but it is most likely the water pump. How many miles on your truck?
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Repairs: CPS, Water Separator Valve assembly, rear axle bearings, VSS, batteries, brakes, alternator, serpentine belt (x2), all 4 power lock actuators, water pump, air conditioning lines

2009 VW Tiguan 2.0 l turbo 200 hp gas engine (TDI engine not available for it yet)
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Old 05-04-2006, 06:05 PM   #5 (permalink)
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Re: Coolant leak

Truck has 104,000 miles on it.
The leak is somewhere above the harmonic balancer, and leaking down the block. The lower hose doesn't have anything on it.
If it's leaking from the weep hole, does that mean it needs replaced?
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Old 05-04-2006, 06:20 PM   #6 (permalink)
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Re: Coolant leak

Yep, it means the clock is ticking. It will only get worse.
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Repairs: CPS, Water Separator Valve assembly, rear axle bearings, VSS, batteries, brakes, alternator, serpentine belt (x2), all 4 power lock actuators, water pump, air conditioning lines

2009 VW Tiguan 2.0 l turbo 200 hp gas engine (TDI engine not available for it yet)
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Old 05-04-2006, 06:24 PM   #7 (permalink)
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Re: Coolant leak

Not exactly what I wanted to hear, but thanks for the help and fast responses.
I really appreciate it!
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Old 05-04-2006, 06:31 PM   #8 (permalink)
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Re: Coolant leak

sounds about the right amount of mileage for the pump to go bad i got about 110k out of each of mine i have put on my 96 but one area to check to make sure is the thermostat housing since those are very prove to leak as well and will travel the same route your coolant is taking as well, a lot cheaper to fix that than it is to do the pump........and if you do have to replace the pump i would recommend getting a 203deg t-stat and billet housing from dieselsite......
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Old 05-04-2006, 06:34 PM   #9 (permalink)
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Re: Coolant leak

If you're much of a diy'er, you can do the water pump yourself. There's some good info on this site with detailed instructions. I would buy a new water pump, though. I've gotten burnt by remanufactured pumps on other vehicles, so I'll pay the extra money to have a better chance that I won't have water pump problems in the future. While you're at it, it would be a good time to change out the thermostat housing and thermostat, and change your hoses. Replace the upper hose with the hose for a dual alternator set-up. It routes it around the serpentine belt, instead of through it.
I haven't done mine yet, but I'm watching real close so that I can do it BEFORE I'm on a long road trip.
Good luck. [img]/ubbthreads/images/graemlins/smokin.gif[/img]
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Repairs: CPS, Water Separator Valve assembly, rear axle bearings, VSS, batteries, brakes, alternator, serpentine belt (x2), all 4 power lock actuators, water pump, air conditioning lines

2009 VW Tiguan 2.0 l turbo 200 hp gas engine (TDI engine not available for it yet)
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Old 05-04-2006, 07:53 PM   #10 (permalink)
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Re: Coolant leak

Get a new water pump and new ambulance hose from our sponser, www.powerstrokeshop.com and a 203 'stat and aluminum tube from www.dieselsite.com (Bob Riley); you're good to go.
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Old 05-04-2006, 08:02 PM   #11 (permalink)
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Re: Coolant leak

[ QUOTE ]
Get a new water pump and new ambulance hose from our sponser, www.powerstrokeshop.com and a 203 'stat and aluminum tube from www.dieselsite.com (Bob Riley); you're good to go.

[/ QUOTE ]

Not to steal a recommendation from powerstrokeshop.com, but Bob Riley can fix you up with the whole package. He has new water pumps for a good price as well as the hose, 203 t'stat, and housing. I got my stuff from Bob when my WP went bad.
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Old 05-05-2006, 04:39 AM   #12 (permalink)
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Re: Coolant leak

water pump replacement walkthrough:

http://www.thedieselstop.com/content...%20Replacement
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Old 05-05-2006, 02:31 PM   #13 (permalink)
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Re: Coolant leak

My truck has 134K on it and has had that same exact drip for about 2 mos now. I have bought all the above supplies and am readying for a free weekend to do the work. Since the leak is small I keep topping of the fluid once a week hoping the bearing doesn't freeze up. All the instructions on this site makes the job a slam dunk.
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Old 05-06-2006, 11:03 AM   #14 (permalink)
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Re: Coolant leak

[ QUOTE ]
OK, I checked it with a napkin, and it is coolant.
A little more info.
This morning there was a small puddle. Drving around today, I checked every time I stopped somewhere, and there wasn't any leaks. When I came home and parked it, it was leaking, and is still leaking. It's not leaking real bad, but it is a steady drip.

[/ QUOTE ]

check where the lower water pump kneck bolts to the pump. i had a steady drip on my truck when it was parked cold. as soon as it heated up the o-ring would expand and the leak would stop.

its around 7 bucks for the o-ring and 2 10mm bolts to take the kneck off.
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Old 05-06-2006, 09:30 PM   #15 (permalink)
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Re: Coolant leak

Thanks to all who replied.
Unfortunately I couldn't wait to order the parts, so I had to get what I could from Oreillys'.
I decided to replace the cps while I had everything apart. Got it all put back together without problems.
Again thank you all.
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