Coolant Leak - puddled on top of engine | Ford Explorer - Ford Ranger Forums - Serious Explorations

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

Coolant Leak - puddled on top of engine

spaulj

New Member
Joined
December 30, 2011
Messages
2
Reaction score
0
Year, Model & Trim Level
2006 Ford Explorer 4.0 V6
My 2006 Explorer is leaking coolant with a significant puddle on top of engine. Radiator, hoses, thermostat housing, and water pump show no leaks. Smelled it when driving in stop and go traffic, stopped and noticed a pretty good bit dripping off cross-member below firewall. Level in reservoir and temp OK. When I made it home (mostly interstate) dripping was very minimal in garage. Level still OK but down slightly. That's when I noticed puddle on engine. I'm thinking intake manifold gasket? Oil on dipstick looks OK. Not smoking and running fine. Any thoughts or suggestions? Thanks.
 
<

Join the Elite Explorers $20 Gets rid of the ads!

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.




edwx

Well-Known Member
Joined
July 4, 2006
Messages
796
Reaction score
9
City, State
Jacksonville, FL
Year, Model & Trim Level
2020 Ford Explorer XLT
Probably not intake manifold gasket. Suggest checking the hoses/connections again, and just keep an eye on it.
 
<



<



spaulj

New Member
Joined
December 30, 2011
Messages
2
Reaction score
0
Year, Model & Trim Level
2006 Ford Explorer 4.0 V6
Thanks for the input. Cleaned puddles on top of block and pressurized cooling system. Turned out to be leaking from junction of lower thermostat housing and engine. Changed gasket but still leaked for some reason. Went ahead and replaced housing and now I'm back in business!
 
<



nleipziger

Active Member
Joined
August 19, 2006
Messages
84
Reaction score
1
City, State
Langhorne, PA
Year, Model & Trim Level
2006 Eddie Bauer
What is the procedure for draining the coolant in an '06 w/ V6? Do you just pull a lower radiator hose or is there a drain valve? I need to replace the lower thermo housing.
 
<



edwx

Well-Known Member
Joined
July 4, 2006
Messages
796
Reaction score
9
City, State
Jacksonville, FL
Year, Model & Trim Level
2020 Ford Explorer XLT
There's a drain valve.
 
<



acres90

Member
Joined
August 17, 2012
Messages
21
Reaction score
0
City, State
lockney, tx
Year, Model & Trim Level
2007 ford explorer
my '07 did the same damn thing
 
<



nleipziger

Active Member
Joined
August 19, 2006
Messages
84
Reaction score
1
City, State
Langhorne, PA
Year, Model & Trim Level
2006 Eddie Bauer
Just replaced the housing, 2 seals, and sensor. Less than an hour including draining the radiator.
 
<



Snakehn

Active Member
Joined
January 1, 2012
Messages
56
Reaction score
0
Year, Model & Trim Level
2006 Ford Explorer XLT
sorry to revive this old thread but i've found myself in the same situation, is this a fairly difficult task to DIY?
 
<



Flag Gibby

Explorer Addict
Joined
October 14, 2012
Messages
1,641
Reaction score
3
City, State
Flagstaff, AZ
Year, Model & Trim Level
2006 Mountaineer AWD
No, not that difficult a couple of hose clamps plus the stuff mentioned in post #8 to remove and a few 10mm bolts I believe. Just be careful to not over tighten the bolts and crack the new plastic housing when putting everything back on.
 
<



jakeamondo

Member
Joined
January 23, 2008
Messages
36
Reaction score
0
City, State
Somers, New York
Year, Model & Trim Level
'95 Explorer 4.0/ '07 XLT
Thermostat housing replacement info

As mentioned do not over-tighten the bolts. The water outlet bolts torque is 10Nm (89 inch pounds. The lower housing bolts (longer bolts) torque is 11Nm (97 inch pounds). There are 12 inch lbs in a foot lb, so be careful that's only 7.416 foot lbs and 8.08 respectively. Threads must be clean and dry and gaskets or O rings must be new. Dirty threads will cause under tightening and wet or oily threads cause over tightening. Torque wrenches are a must, and are probably the most ignored step by even the best mechanics!
 
<



wArtsmith

Member
Joined
May 2, 2009
Messages
11
Reaction score
0
City, State
Crystal Lake, IL
Year, Model & Trim Level
2006 Explorer Eddie Bauer
Had the same problem on my 2006 V6 4.0L. To consolidate a variety of information to fix this problem, here's how I fixed it:

  • Replaced the lower housing with Motorcraft RH148.
  • Bought the Motorcraft RG614 Engine Coolant Thermostat Housing Gasket, too.
  • Replaced the thermostat with Motorcraft RT1167 190F and 88C Thermostat - it does NOT come with a new gasket, unfortunately

IMPORTANT: Your existing temperature sensor will NOT fit snugly in this housing. Even a new Motorcraft 9377 will not. Went to the dealer and proved this.

Instead, go to the hardware store and get a #8 o-ring for a faucet and replace it on your sensor. It will be very snug, where pushing it in may be too challenging. I used a small rubber mallet to gently tap it in.

The retaining clip is a complete PIA to reinstall. I chose to go with a heavy gauge paperclip and crafted a new clip, bending the ends on the other side. (If someone has a sure-fire way to replace that clip, I'd love to hear it!) A new clip is around $9 at the dealer.

My Explorer just crossed 100K and so I replaced the upper and lower radiator hoses, too. In total, the repair cost around $100 or so.
 
<



JeffAntonucci

New Member
Joined
March 20, 2016
Messages
1
Reaction score
0
City, State
West Chester Pa
Year, Model & Trim Level
2009 Explorer Sport Trac
Super helpful thread - thanks guys! Just completed this repair on my 2009 Sport Trac.

Jeff
 
<



bob_h98

New Member
Joined
April 5, 2015
Messages
1
Reaction score
0
City, State
collegeville, pa
Year, Model & Trim Level
2006 ford explorer
My 2006 Explorer is leaking coolant with a significant puddle on top of engine. Radiator, hoses, thermostat housing, and water pump show no leaks. Smelled it when driving in stop and go traffic, stopped and noticed a pretty good bit dripping off cross-member below firewall. Level in reservoir and temp OK. When I made it home (mostly interstate) dripping was very minimal in garage. Level still OK but down slightly. That's when I noticed puddle on engine. I'm thinking intake manifold gasket? Oil on dipstick looks OK. Not smoking and running fine. Any thoughts or suggestions? Thanks.
I have an 06 explorer and i'm experiencing the same issues as you did. what was the final verdict and how did you fix it? thanks
 
<



acres90

Member
Joined
August 17, 2012
Messages
21
Reaction score
0
City, State
lockney, tx
Year, Model & Trim Level
2007 ford explorer
I bought a new thermostat housing. Easy fix. Bought it from am-autoparts. Vatozone wanted $75 for the same part.
 
<



cello6996

Member
Joined
April 2, 2011
Messages
17
Reaction score
0
City, State
Taylor, Michigan
Year, Model & Trim Level
94,2006 Explorer XLT 4WD
Just did mine huge puddle on top of engine. Going to have to try the #8 o ring as darn sensor leaks under pressure. A old tip for anyone wanting to pressure test any newer systems with a reservoir attach a low pressure air to the reservoir hose be very careful to not use more than 13 psi! Works like a charm
 
<



<



<



Ravenloft

New Member
Joined
June 9, 2017
Messages
7
Reaction score
0
City, State
Brooklyn, New York
Year, Model & Trim Level
2006 Mercury Mountaineer
Few months back I had the same problem. It was my thermostat housing. It was cracked. And it was made out of plastic.
 
<

Join the Elite Explorers $20 Gets rid of the ads!

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.




Mitchs07explorer

Well-Known Member
Joined
August 14, 2015
Messages
412
Reaction score
48
Location
Idaho
City, State
Meridian, Idaho
Year, Model & Trim Level
97 XLT V8 AWD
07 XLT V6
Hey guys, add another to the list, same issue here, just over 100k. I think it's bee leaking for a few months now but I just recently noticed the corrosion around the housing. We had a very hard winter in Idaho this last year and I think many of my plastic parts suffered. I just bought a new motor craft housing but am wondering if I should shell out the extra cash for the aluminum housing. Also my real question here is should I also replace the water pump? I haven't really inspected it yet and maybe it's leaking too, I'm not sure but if it's not and it looks okay is it a good maintenance item to replace?
 
<



Top