Odd Coolant Leak - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 03-18-2008
Member
Thread Starter
 
Join Date: Sep 2005
Location: Avon, CT
Posts: 19
Odd Coolant Leak

I've got a 4.0 OHV and for some reason, I've been finding two small puddles of coolant under my truck in the morning. I took it to the dealer and had them pressure test it and they said they couldn't find a leak anywhere. I thought it might have been something with the really cold weather at school contracting a gasket or seal or something but now that I'm home and its a little warmer and still leaking, I'm running out of ideas. I wrenched down on the bolts on the thermostat covering yesterday but when I came out this morning, something was still leaking. I snapped a few pictures althought it might be hard to see where the coolant is standing on the engine, I'll try to point them out:


The front two puddles are most recent


Drivers side of the engine, look for the glossy and dark areas in the center


Passenger side, glossy area in the middle, fair sized puddle


Picture of the thermostat housing
Reply With Quote
  #2  
Old 03-18-2008
WowMike2001's Avatar
Member
 
Join Date: Oct 2007
Location: Stevenson, WA
Posts: 2,583
Well, I see it scoming from the water pump in that lower picture... Could be coming out the weep holes, althbough on the OHV I'm not sure if its where I think they are or not..


I'll let someone with experience in the OHV motor lend a little more help then I can.
Reply With Quote
  #3  
Old 03-19-2008
wydopnthrtl's Avatar
Member
iTrader: (2)
 
Join Date: Dec 2005
Location: SE, Mi
Posts: 2,342
It's more than likely the water pump seal.

Look for evidence of green / white residue on the bottom side of the water pumps snout. There is a little hole that it'll be coming from if that's the problem.

If so.. gotta replace the pump.

Rich (OEM water pump engineer for 6 yrs )
Reply With Quote
  #4  
Old 03-19-2008
vansnxtweek's Avatar
Member
 
Join Date: Feb 2005
Location: USA
Posts: 2,666
Now see I am having leaks also...but pressure is fine..and mine isn't leaking as bad as taht..but I still smell it everytime I cut the truck off and I do lose a little from the resevoir every week or so...Im lost also..
Reply With Quote
  #5  
Old 03-19-2008
RANGERMAN66's Avatar  
Join Date: Jan 2007
Location: OR
Posts: 0
Mine is doing the same thing as described above, got under the vehicle and found it coming from the water pump seal. Gonna take it off and replace with Fel-Pro seal that has silicone bead on gasket.
Reply With Quote
  #6  
Old 03-20-2008
Member
 
Join Date: May 2006
Location: Altoona, IA
Posts: 91
based on that last pic, I would say it's the o-ring that's around the thermostat. Have you changed your t-stat and not changed the o-ring?

Anyways, It gets compressed, if it's high miles I can see it leaking. A new t-stat and o-ring should be less than $10. And it's about a 20 minute job. Alot easier than pulling the water pump if your not positive that's it.
Reply With Quote
  #7  
Old 03-20-2008
Member
Thread Starter
 
Join Date: Sep 2005
Location: Avon, CT
Posts: 19
Well, I just went out to check for leaks today and there weren't any at all. I checked the reservoir too and it was at the same level. I'm guessing that cranking down on the thermostat housing bolts did it and the continued leak was from coolant that was still standing on the block that dripped down when I had parked it. I checked the snout and the seal around the water pump as well just to make sure and I didn't see any fluid leaking from either of those areas. Thanks for the input.
Reply With Quote
  #8  
Old 03-20-2008
DangaRanger99's Avatar
Member
 
Join Date: Mar 2006
Location: Farmington, NH
Posts: 1,209
Quote:
Originally Posted by vansnxtweek View Post
Now see I am having leaks also...but pressure is fine..and mine isn't leaking as bad as taht..but I still smell it everytime I cut the truck off and I do lose a little from the resevoir every week or so...Im lost also..


Mine is doing the EXACT same thing....No Leaks, when i SHUT THE MOTOR OFF theres a very strong odor of anti freeze and every 2 weeks or so i go through about 1/4 gallon or so of anti freeze, and again NO leaks what-so-ever
Reply With Quote
  #9  
Old 03-20-2008
Member
 
Join Date: Jan 2007
Location: Millington Tn
Posts: 132
Quote:
Originally Posted by DangaRanger99 View Post
Mine is doing the EXACT same thing....No Leaks, when i SHUT THE MOTOR OFF theres a very strong odor of anti freeze and every 2 weeks or so i go through about 1/4 gallon or so of anti freeze, and again NO leaks what-so-ever

Watch your exhaust pipe when you start it up first thing in the morning. For that matter every time you start it. Yours sounds like a Head Gasket.

****
Reply With Quote
  #10  
Old 03-22-2008
rolsmojave3's Avatar
Level III Supporter
 
Join Date: Jun 2006
Location: Wisconsin
Posts: 2,852
I had 2 OHV's and both had these problems. On both trucks I found the leak originating from the passenger side head near the firewall, most of the coolant getting burned off before getting to the ground, but it left a nice green/white stain so I could find it.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Odd coolant leak / Starter oil leak?? iplayloudly 2.9L & 3.0L V6 Tech 2 12-12-2011 05:04 PM
Coolant leak???? silverstang00 General Technical & Electrical 1 03-06-2009 05:47 PM
Coolant leak??? silverstang00 2.9L & 3.0L V6 Tech 0 03-06-2009 05:20 PM
Coolant temp sensor leak? PW01 4.0L OHV & SOHC V6 Tech 8 12-30-2007 11:06 PM
HELP! Coolant leak mindfreak General Ford Ranger Discussion 9 03-17-2007 09:28 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 01:04 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.