Go Back   MustangForums.com > Ford Mustang Tech > 2005 - 2014 Mustangs > V6 S197 General Discussion > 4.0L V6 Technical Discussions
Sign in using an external account
Register Forgot Password?
Search


4.0L V6 Technical Discussions Any questions about engine, transmission, exhaust, tuners/CAI, or gearing can be asked here!

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Coolant leak.... Head gasket?

Reply
 
 
 
 
Thread Tools Search this Thread
Old 11-04-2010, 04:40 PM   #1
Bobarian91
 
Bobarian91's Avatar
 
Join Date: Feb 2010
Vehicle: 2006 Ford Mustang
Location: New Mexico
Posts: 25
Send a message via Yahoo to Bobarian91
Question Coolant leak.... Head gasket?

OK, so my check engine light came on about a month ago and I didn't really think twice about it because I didn't have the money to get it fixed. BUT, now I noticed when I park it, it's leaking something... well, turns out its coolant. I can't really tell if it's water pump, intake, or head gasket cuz there's too much crap in the way... it has coolant on TOP of the motor as well, and it's been leaking down the passenger side and spraying everywhere. It hasn't been overheating, but it had lost enough coolant to worry about, but thats been over the course of a month... How likely is it that the head gasket is cracked? I don't run it very hard except for rarely and it hasn't overheated... But I know the head gaskets aren't the strongest things either... Help?
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________
2006 Mustang 4.0- Bought in feb, mods to come
1979 Chevy C-10 Step Side, 5.7- 3yrs proud ownership and counting
Bobarian91 is offline   Reply With Quote
Old 11-04-2010, 05:04 PM   #2
2007 grimlock stang
1st Gear Member
 
Join Date: May 2009
Vehicle: 2007 Ford Mustang V6
Location: San Diego, CA
Posts: 110
Default

I'd check the rad hoses as well. Do it with the engine running. See if you see where it's coming from.
__________________
2007 Silver V6 Auto
K&N CAI; Bama 91Race; ASP UDP; Flowmaster AT; FRPP TLock/4.10 Gears; ScreaminDemon Coil; JBA PowerCables; Deka ETX14 Battery; Mishimoto Perf Rad; Steeda Rad Support; BMR KMem/AArms; JBA Shorties; Moroso Tanks 170# Wt Reduction (3175#)
120# FRONT=Engine Braces 5#; Rad/Support 15#; Firewall/Fend/Hood Sound Mat 5#; Intake 10#; UDP 5#; Battery/brace 25#; KMem/Arms 35#; Headers 15#; Tanks 5#
50# REAR=SpareTire 30#; SpareTireJack/TBar/Trunk Lining/Floor/Molding 10#; Axle Wts 10#
2007 grimlock stang is offline   Reply With Quote
Old 11-04-2010, 05:07 PM   #3
Bobarian91
 
Bobarian91's Avatar
 
Join Date: Feb 2010
Vehicle: 2006 Ford Mustang
Location: New Mexico
Posts: 25
Send a message via Yahoo to Bobarian91
Default

I checked with the enigne running and nothing from the hoses. It was leaking out somewhere below the head gasket but it was too awkward to see if it could have been the water pump gasket or not. At least it LOOKED like it was below the head gasket. I didn't see anything noticeable above it aside from on tope of the motor... would a water pump gasket or hoses trip the check engine light?
__________________
2006 Mustang 4.0- Bought in feb, mods to come
1979 Chevy C-10 Step Side, 5.7- 3yrs proud ownership and counting
Bobarian91 is offline   Reply With Quote
Old 11-04-2010, 05:19 PM   #4
Bobarian91
 
Bobarian91's Avatar
 
Join Date: Feb 2010
Vehicle: 2006 Ford Mustang
Location: New Mexico
Posts: 25
Send a message via Yahoo to Bobarian91
Default

and while we are talking about it, I've replaced head gaskets on an OLD school motor before... but how complicated does it get with these things? Could I buy the parts and do it myself?
__________________
2006 Mustang 4.0- Bought in feb, mods to come
1979 Chevy C-10 Step Side, 5.7- 3yrs proud ownership and counting
Bobarian91 is offline   Reply With Quote
Old 11-04-2010, 06:02 PM   #5
Bobarian91
 
Bobarian91's Avatar
 
Join Date: Feb 2010
Vehicle: 2006 Ford Mustang
Location: New Mexico
Posts: 25
Send a message via Yahoo to Bobarian91
Default

ok so I went out and checked it EVERYWHERE. looks likes it a combo... the thermo housing is leaking onto the top of the motor, the head gasket is leaking out to the side, and somewhere on the front of the motor is leaking as well.... either way i think the head gasket is screwed... so how hard is it to replace them?
__________________
2006 Mustang 4.0- Bought in feb, mods to come
1979 Chevy C-10 Step Side, 5.7- 3yrs proud ownership and counting
Bobarian91 is offline   Reply With Quote
Old 11-04-2010, 08:24 PM   #6
tx_zstang
5th Gear Member
 
tx_zstang's Avatar
 
Join Date: May 2007
Vehicle: 2006 Turbo V6; 2005 V6->V8 swap beast
Location: Central Texas
Posts: 2,351
Default

Thermostat housing cracked. VERY common problem. Replace it first. The coolant will find its way down and around other places, so you probably don't have a head gasket leaking, unless you have water in the engine oil.
__________________
Mike - 2005 Stroked/Forged/Cammed V8 (5.0L.); twin-turbo build underway
- 2006 4.0 V6 with PH Turbo and TR6060
tx_zstang is offline   Reply With Quote
Old 11-05-2010, 03:36 PM   #7
Bobarian91
 
Bobarian91's Avatar
 
Join Date: Feb 2010
Vehicle: 2006 Ford Mustang
Location: New Mexico
Posts: 25
Send a message via Yahoo to Bobarian91
Default

you were right, it was thermo housing. unfortunately I found this out after being stranded. I think the thermo was bad cuz it built up enough pressure to blow the housing off after destroying the gasket... I'm having trouble finding the parts for it tho. It doesnt seem to be too complicated so I think I'll try to do it myself if i can get the parts
__________________
2006 Mustang 4.0- Bought in feb, mods to come
1979 Chevy C-10 Step Side, 5.7- 3yrs proud ownership and counting
Bobarian91 is offline   Reply With Quote
Old 11-05-2010, 03:49 PM   #8
Nuke
6th Gear Member
 
Nuke's Avatar
 
Join Date: Jun 2007
Vehicle: 2007 GT
Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
Posts: 16,116
Send a message via AIM to Nuke Send a message via Yahoo to Nuke Send a message via Skype™ to Nuke
Default

Considering that you identified this problem over 1 month ago, I'm surprised it hasn't stranded you sooner. Regardless, for not taking it seriously at the onset you probably deserve being stranded but that's just my 2 cents, probably because my ex would wait to tell me something was wrong after she saw or heard something weeks earlier when it was a minor problem and not a major repair.

As far as the CEL, I don't believe coolant issues would throw a CEL. Absolutely have the code pulled at Autozone or similar joint if you don't have a tuner.
__________________
Rick
07 GT Prem: Alloy, MT, 3.55's, Steeda CAI w/Brenspeed tunes, FRPP Stingers, 275/40/18 Goodyear Eagle F1 A/S on SVT Cobras (OE GT500's), 14" shorty, Wheelskin side scoops & qtr window louvers, A-H rear window louvers, SHR honeycomb blackout panel, Sequentials, Hella Optilux Extreme XY fogs, Silverstars
06 V6: Legend Lime, Pony Package, 14" shorty, Sequentials, Hella Optilux Extreme XY fogs, Silverstars
Nuke is offline   Reply With Quote
Old 11-05-2010, 06:29 PM   #9
tx_zstang
5th Gear Member
 
tx_zstang's Avatar
 
Join Date: May 2007
Vehicle: 2006 Turbo V6; 2005 V6->V8 swap beast
Location: Central Texas
Posts: 2,351
Default

Check with some of the people who have V6 parts for sale. You can pick one up for a decent price. Also, new from a discount online supplier is a good option. If you need one locally, you'll pay for it at the dealership.

Just make sure you get the piece(s) you need, top, bottom, or both. Get the O-ring for the t-stat, and make sure you put the t-stat back in properly! It's easier to get to if you remove the throttle body.
__________________
Mike - 2005 Stroked/Forged/Cammed V8 (5.0L.); twin-turbo build underway
- 2006 4.0 V6 with PH Turbo and TR6060
tx_zstang is offline   Reply With Quote
Old 11-06-2010, 10:43 AM   #10
Bobarian91
 
Bobarian91's Avatar
 
Join Date: Feb 2010
Vehicle: 2006 Ford Mustang
Location: New Mexico
Posts: 25
Send a message via Yahoo to Bobarian91
Default

I didn't know autozone would pull a code, I never really go to autozone but that's worth it to do I suppose. You're probably right, I probably did deserve it haha but remember I'm a redneck. I'm used to super old school cars that you don't have to worry about so i was kinda treatin it like that.
zstang... yeah I notcied the TB kinda gets in the way... I have the parts ordered so they'll be here soon enough I suppose. I have ppl who will drive me around til I get the stang back on the road so I think it'll work out.... and once i do get it on the road again I'll have someone pull that code and check it.
__________________
2006 Mustang 4.0- Bought in feb, mods to come
1979 Chevy C-10 Step Side, 5.7- 3yrs proud ownership and counting
Bobarian91 is offline   Reply With Quote
Old 06-15-2011, 12:40 PM   #11
mr-prl
 
Join Date: Jun 2011
Vehicle: 2007,Ford,Mustang
Location: California
Posts: 1
Default 2007 4.0 Coolant Leak

First off wanted to thank the thread for helping me find the Coolant leak. It was a cracked lower thermostat housing. Was quite actually hard to determine where the leak was coming from just by looking. After replacing the Water pump / belt / thermostat / pulley since i already had things apart and the motor had 100k.

Now a Rant, from a lifelong Chevrolet driver, I'm guessing the Plastic Housing is some sort of Bean Counter engineering feat. This type of engineering is so unnecessary and could have ended up potentially costing thousands had the motor been driven hot and blown a head gasket, cracked a head etc....

Anyway thanks and we hope to get another problem free 100k with all normal type maintenance completed.
mr-prl is offline   Reply With Quote
Old 06-17-2011, 01:37 AM   #12
tx_zstang
5th Gear Member
 
tx_zstang's Avatar
 
Join Date: May 2007
Vehicle: 2006 Turbo V6; 2005 V6->V8 swap beast
Location: Central Texas
Posts: 2,351
Default

+1 on that. Wonderful design.
Funny, though, most people instantly think its a head gasket leak. I was at a local track one night, v6'r had his hood up, I went over and he said he blew a head gasket. I helped him out and showed him the thermostat housing leaking, which made him feel better. I think he was going to catch hell for "tearing up the car at the track", which had nothing to do with the already-cracked t-stat housing...it was going to go at anytime anyways.

Glad to see y'all all got the 'head gasket' fixed, lol.
__________________
Mike - 2005 Stroked/Forged/Cammed V8 (5.0L.); twin-turbo build underway
- 2006 4.0 V6 with PH Turbo and TR6060
tx_zstang is offline   Reply With Quote
Old 08-25-2011, 04:43 PM   #13
rsfdiver
 
Join Date: Sep 2007
Location:
Posts: 26
Default

Wifes car is overheating with the A/C on sitting in 97deg heat in line to pick up daughter. Happened 2 days in a row. Once cooled down and running seems to be no problem.
I will check the things you all talked about and hopefully it isn't a head gasket. It hasn't done it while out rodaying just when sitting at idle in the heat.
rsfdiver is offline   Reply With Quote
Old 09-02-2011, 12:14 AM   #14
tx_zstang
5th Gear Member
 
tx_zstang's Avatar
 
Join Date: May 2007
Vehicle: 2006 Turbo V6; 2005 V6->V8 swap beast
Location: Central Texas
Posts: 2,351
Default

THe cooling fan may not be turning on; it's a fairly common problem (the resistor in the low-speed circuit burns through).
Head gaskets are not usually an issue with these cars.
__________________
Mike - 2005 Stroked/Forged/Cammed V8 (5.0L.); twin-turbo build underway
- 2006 4.0 V6 with PH Turbo and TR6060
tx_zstang is offline   Reply With Quote
Old 09-02-2011, 04:19 PM   #15
mustang country
2nd Gear Member
 
mustang country's Avatar
 
Join Date: Apr 2007
Vehicle: 2007 Ford Mustang
Location: Miami, FL
Posts: 151
Default

I just realized this problem today. I was on my way to an auto body shop to get my hood painted when halfway there, the temperature gauge started to go up. Lucky for me my uncle has a garage nearby because smoke was starting to come out of the hood. He said the plastic housing on the thermostat could be cracked.
__________________
2007 automatic V6 Vista Blue Mustang 5 sp with gray hood chrome and Roush Spoiler.
mustang country is offline   Reply With Quote
Old 09-02-2011, 04:19 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
2006, 2007, 40, 40l, coolant, engine, ford, gasket, head, leak, mustang, mustangforums, replace, top, v6

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

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 06:10 AM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup