• Register Today It's free! This box and some ads will disappear once registered!

^^Searches ExplorerForum.com^^

Which way the coolant flows in the heater core?


1998Exp

Well-Known Member
Joined
December 5, 2010
Messages
1,126
Reaction score
76
City, State
Seattle WA
Year, Model & Trim Level
98 Limited V8 AWD
My good luck of not getting stranded with my Ex in almost 20 years finally ran out - and in a not-so-convenient place to boot. A nipple sheared clean off the plastic heater valve, and it lost all coolant on a remote forest road. Overconfidence in the Ex made me travel with no tools and no water, but luckily there was cell reception there, so just a couple hours later the AAA-dispatched tow truck showed up. Using his pair of pliers we removed the offender, plugged the water hose directly into the heater core nipple, filled the radiator (with tap water, but what the heck...), and I was on my happy way back.
So here is where I need your help: the valve has an arrow, pointing (one would think) in the direction of the flow. I assumed that it should point towards the heater core, but my visual memory tells me it was the other way round. It's installed on the outboard hose, so if that direction is correct, this would be the return hose and the valve turns off the return flow. Strange... Can anyone do me a favor, pop the hood and take a look? Much appreciated!
 


Join the Elite Explorers for $20 per year. Gets rid of the ads! New $5 per month option.

Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see no advertisements, no banner ads, no double underlined links, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create and save more private Conversations, and more. Join Today. Your support is greatly appreciated.




donalds

Elite Explorer
Joined
July 12, 2015
Messages
2,771
Reaction score
744
Location
Stem
City, State
Nc
Year, Model & Trim Level
1999 ford explorer sohc




donalds

Elite Explorer
Joined
July 12, 2015
Messages
2,771
Reaction score
744
Location
Stem
City, State
Nc
Year, Model & Trim Level
1999 ford explorer sohc
Best pic I can get

20191011_051802_kindlephoto-125689129.jpg
 




1998Exp

Well-Known Member
Joined
December 5, 2010
Messages
1,126
Reaction score
76
City, State
Seattle WA
Year, Model & Trim Level
98 Limited V8 AWD
Thanks a lot donalds! The site was down, so only seeing your response now.
The direction your photo is showing makes a lot of sense, because that's the inlet to the HC, and the arrow points to it if mounted that way. Found out that mine was installed backwards. I never touched it, and doubt that the PO did, because it was less than 2 years old when I bought the vehicle. Most likely that's how it came out of the factory -- I have seen stranger things than that in the land of "Quality is Job 1".
Probably either did not stop the flow completely when it should have, or made a restriction when it was supposed to be fully open. I live in a mild climate, so never noticed a problem -- until the thing broke, but that's almost certainly just age related.
 




donalds

Elite Explorer
Joined
July 12, 2015
Messages
2,771
Reaction score
744
Location
Stem
City, State
Nc
Year, Model & Trim Level
1999 ford explorer sohc
No problem:dpchug:
 




Thread starter Similar threads Forum Replies Date
A Is my timing cover leaking coolant? Stock 1995 - 2001 Explorers 22
K Where could my coolant leak/issue be? Stock 1995 - 2001 Explorers 2
S 5.0 coolant leak Stock 1995 - 2001 Explorers 3
M Zerex G-05 coolant? Stock 1995 - 2001 Explorers 3
G 1995 Ford Explorer 4.0 Intake coolant tube question Stock 1995 - 2001 Explorers 5
Mike65 Coolant leak l/s front 4.0 SOHC. Stock 1995 - 2001 Explorers 4
N 4.0 pushrod coolant leak Stock 1995 - 2001 Explorers 17
T Coolant Leak Help Stock 1995 - 2001 Explorers 3
B Looking for Coolant Line Help Stock 1995 - 2001 Explorers 1
E Mystery: Coolant leak stopped? Stock 1995 - 2001 Explorers 8
M 97 5.0 mountaineer coolant leak & tapping Stock 1995 - 2001 Explorers 1
V 01 explorer, leaking coolant, top left motor Stock 1995 - 2001 Explorers 12
D Coolant dripping from under passenger seat Stock 1995 - 2001 Explorers 6
B Where is this coolant leak coming from? Stock 1995 - 2001 Explorers 6
N Leaking coolant passenger side Stock 1995 - 2001 Explorers 4
D Minor Coolant Leak - help ID this part? Stock 1995 - 2001 Explorers 5
B 5.0 Coolant leak from bottom of engine Stock 1995 - 2001 Explorers 32
C 97 XLT 4.0 SOHC - Coolant drip on passenger-side, front of engine Stock 1995 - 2001 Explorers 34
A small mystery coolant leak Stock 1995 - 2001 Explorers 7
K 99 4.0 SOHC Torque Pro shows coolant temp -32c, runs like crap Stock 1995 - 2001 Explorers 9
M 1996 Sport - 4.0 OHV Coolant Leak Stock 1995 - 2001 Explorers 8
J 2000 Sport slight coolant smell from vents Stock 1995 - 2001 Explorers 6
A Strange Coolant Leak on 96 Explorerks, I have a 1996 Ford Explorer 4. Stock 1995 - 2001 Explorers 5
A Coolant drain? Stock 1995 - 2001 Explorers 5
M Coolant in oil. Stock 1995 - 2001 Explorers 13
S Coolant Leak - Water Pump or Timing Cover? (Video) Stock 1995 - 2001 Explorers 8
J 1998 4.0 Coolant Question. Stock 1995 - 2001 Explorers 11
S Coolant leak from water pump bolt Stock 1995 - 2001 Explorers 18
K Coolant system problem Stock 1995 - 2001 Explorers 14
N 1996 4.0 Contaminated Coolant Stock 1995 - 2001 Explorers 7
M Engine coolant temperature sensor Stock 1995 - 2001 Explorers 6
J Coolant leak Stock 1995 - 2001 Explorers 9
T Coolant leak repair > missing at all RPMs Stock 1995 - 2001 Explorers 12
N Coolant leak tracking Stock 1995 - 2001 Explorers 1
Mikey98Ex5.0 1998 5.0 coolant type? Stock 1995 - 2001 Explorers 4
R NEED HELP! Coolant Leak Stock 1995 - 2001 Explorers 7
A '00 Coolant return tube Stock 1995 - 2001 Explorers 4
F 4L Coolant Gage Fluctuation Stock 1995 - 2001 Explorers 6
J Coolant leak Stock 1995 - 2001 Explorers 9
W Mysterious coolant leak..... Stock 1995 - 2001 Explorers 13
A Coolant disappearing, where's it coming from though... Stock 1995 - 2001 Explorers 19
I Coolant upper air manifold bypass? Stock 1995 - 2001 Explorers 3
J added some 50/50 engine coolant and tranny fluid (1qt) and this morning... Stock 1995 - 2001 Explorers 14
prayforsurf0 Coolant Leak SOHC Stock 1995 - 2001 Explorers 10
J Coolant not drawing from recovery tank Stock 1995 - 2001 Explorers 3
J 5.0 L coolant leak, water pump or timing cover? Stock 1995 - 2001 Explorers 15
W Coolant hose hard Stock 1995 - 2001 Explorers 8
Mike65 Coolant leak, cold engine. Stock 1995 - 2001 Explorers 3
T Blown headgasket? Coolant Leak? Man... Stock 1995 - 2001 Explorers 3
A Sludge in the engine coolant reservoir Stock 1995 - 2001 Explorers 5
Similar threads


















































Top