What is this thing? - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 08-17-2012, 12:45 PM Thread Starter
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What is this thing?

I have coolant leaking out of this very slow but enough to notice. What is it? What does it do? How do I get it to stop leaking? It is coming from the phillips head screw there, should i just replace it? Thanks!
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Bullet Proof Diesel Semi Bullet Proof Kit - Diesel Site Coolant Filter - Banks Monster 4" Exhaust - High Idel Switch - 2.5 inch Leveling Kit - 295/70/18 Nitto Trail Grappler M/T's - Amsoil
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post #2 of 16 Old 08-17-2012, 12:49 PM
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heater bypass used when you select max AC it blocks coolant to the heater core

u just replace it

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post #3 of 16 Old 08-17-2012, 12:53 PM
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ps it looks like the vacuum tube is off of the end of the vac canister/actuator

common

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post #4 of 16 Old 08-17-2012, 12:55 PM
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actually it looks like someone put the vac line on the back of the actuator arm??

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post #5 of 16 Old 08-17-2012, 12:58 PM Thread Starter
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I'm not 100% sure they are all in the right place, i do know my A/C blows cold even in the 110 degrees its been lately, the grey in color vac line was broke, and i noticed coolant dripping thats how i found the leak. I just cant find the part # for the busted part.

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post #6 of 16 Old 08-17-2012, 01:00 PM
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Check RockAuto Auto Parts under 'heater control valve'. They have the Motorcraft part for $15.99. I had to replace mine shortly after I got the truck because it was leaking just like that. Easy replacement, no problems since.

2005 F250 4x4 King Ranch 6.0
Two tone removed, Quad Captains, High idle mod
Edge Insight CS w/ EGT, fuel PSI, and turbo timer
4" turbo back straight pipe, Dieselsite coolant filter
BPD FICM, '03 turbo, IPR gen2 delete, Zerex ELC
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post #7 of 16 Old 08-17-2012, 01:01 PM
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BTW it's Motorcraft part # 3C7Z18495AB

2005 F250 4x4 King Ranch 6.0
Two tone removed, Quad Captains, High idle mod
Edge Insight CS w/ EGT, fuel PSI, and turbo timer
4" turbo back straight pipe, Dieselsite coolant filter
BPD FICM, '03 turbo, IPR gen2 delete, Zerex ELC
Goodyear Duratracs, Tuned by Matt@Gearhead
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post #8 of 16 Old 08-17-2012, 01:01 PM
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fix the vac line also lol

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post #9 of 16 Old 08-17-2012, 01:20 PM Thread Starter
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any chance i can get one of you too post a picture of yours so i can see this vac line issue your talking about please?

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post #10 of 16 Old 08-17-2012, 01:22 PM
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the gray line on top of the leaky thing goes in the front of the leaky thing

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