constant coolant flow to heater core? - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 06-15-2011, 04:32 PM Thread Starter
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constant coolant flow to heater core?

would this be bad? i have been noticing a coolant smell from under the hood of my truck. i looked and looked and noticed that it seems to be coming from the plastic piece in the coolant line that leads to the heater core. it is opened and closed by a light grey vacuum line when the heater is turned on. i removed this piece and put a piece of straight pipe inline to connect the two ends of the rubber lines. i dont plane on leaving it this way forever but it is 100 degrees down here now so i dont need a heater. is there any down side to having constant flow to the heater core until i replace this part?

06 f350: 8" ICON 2.5 resi's, ouo ala's, pmf track bar, dual stabilizers, custom 5" exhaust, 37" BFG km2's, 4.30s, 08 tailgate w/step, 08 tail lights, coolant filter, BPB oil cooler w/p 58v ficm and radiator, ARPs, 175cc, MTW s1 billet, ported intake, egr delete, onboard air and gearhead tunes
All the above just to haul the 900hp street mustang
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post #2 of 5 Old 06-15-2011, 04:39 PM
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That is just a vacuum operated valve that some trucks have and some don't (depends on model), it just closes off the coolant flow to allow cooler A/C in the cab.

If you removed the gray line, you should block off the vacuum so you don't have a vacuum leak. Ford was kind enough to put a nipple on the HVAC box for you to block off the gray line. If you look at where you refill you motor oil, behind the oil fill an to the side, on the HVAC box you will see this nipple sticking out. Just plug in the gray line their untill you replace the valve.

Edit: below my finger you will see where it goes if not using the valve.

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post #3 of 5 Old 06-15-2011, 06:28 PM Thread Starter
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I haven't used the heater in a while and I know its the new coolant coming out because its red. So basically I have just eliminated the valve altogether by putting a piece of pipein there. Ill get a new valve but it wont be for a couple of days. Just want to make sure im not going to hurt anything. I have the grey line plugged for now so there are no vacuum leaks

06 f350: 8" ICON 2.5 resi's, ouo ala's, pmf track bar, dual stabilizers, custom 5" exhaust, 37" BFG km2's, 4.30s, 08 tailgate w/step, 08 tail lights, coolant filter, BPB oil cooler w/p 58v ficm and radiator, ARPs, 175cc, MTW s1 billet, ported intake, egr delete, onboard air and gearhead tunes
All the above just to haul the 900hp street mustang
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post #4 of 5 Old 06-15-2011, 07:19 PM
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Red coolant?

If your commin, it's over. If your stroken, it's just started.


2007 F250 6.0L PSD Lariat - Dieselsite Coolant Filter - Bilstein Shocks - Blue fuel pressure upgrade spring - Country Duel Steering Stabilizer - Fumoto Oil Drain Valve - HFCM Water Separator Drain Plug Upgrade - ARP studded - Engine Oil (Rotella syth) - Rear Diff. & Front Axle (Royal Purple)
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post #5 of 5 Old 06-15-2011, 07:24 PM Thread Starter
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Im running the cat elc. Just did my oil cooler so hopefully this stuff keeps it clear

06 f350: 8" ICON 2.5 resi's, ouo ala's, pmf track bar, dual stabilizers, custom 5" exhaust, 37" BFG km2's, 4.30s, 08 tailgate w/step, 08 tail lights, coolant filter, BPB oil cooler w/p 58v ficm and radiator, ARPs, 175cc, MTW s1 billet, ported intake, egr delete, onboard air and gearhead tunes
All the above just to haul the 900hp street mustang
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