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V6 S197 General Discussion This section is for technical discussions pertaining specifically to the V6 variation of the 2005 and newer Ford Mustang.

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Old 12-03-2013, 08:39 PM   #21
bighank
 
Join Date: Oct 2006
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Default Agree replace the thermostat - mine overheated and blew head gasket OUCH

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Originally Posted by imtryin67 View Post
You should have replaced the thermostat, that is probably why it cracked. Mine did. I wouldn't give ford any money for parts they didn't make correctly. I bought perma-seal thermostat sealer and clamped it back together with longer bolts and a few extra clamps made from nails bend into a "C" shape. It wasn't until the gasket sealer blew out that Ford is using thermostats that destroy parts by overheating the car again. In the 90's if the thermostat went bad the car just wouldn't warm up, now they overheat and break parts. It has been 2 years since I fixed the housing.
First housing blew at about 40K, second at 110K. Car was intermittently overheating.
Changed thermostat at 115K. Misfire on cylinder 5 at 117K. At this time coolant leaking into cylinder and steam from exhaust. Replaced ENGINE. A $25 THERMOSTAT is much cheaper than another engine. Found a used one and still spent about $1300 for engine and having it installed. CHANGE the LOWER housing and thermostat. Sending unit is OK but when changing the lower housing put a new lower gasket (to the block) and a new gasket to upper housing part.
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Old 12-07-2013, 12:59 PM   #22
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Originally Posted by pascal View Post

There is no metal housing on the horizon for these engines.
http://mustangforums.com/forum/4-0l-...is-thread.html

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You and that darn manual! If you like it so much, maybe you should marry it!

Last edited by 157dB; 12-07-2013 at 01:01 PM.
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Old 12-07-2013, 07:04 PM   #23
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Check the date of my post genius...
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Old 12-14-2013, 11:46 AM   #24
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Genius, that I am...
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You and that darn manual! If you like it so much, maybe you should marry it!
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Old 03-02-2014, 01:35 AM   #25
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Vehicle: 08 v6 mustang
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Default does anyone know why these plastic thermostat casing exolode?

I know that today when mine blew it was in part to the speed at which i was driving. pumps are good,fans are good sensors all good. The thermostat was change just at the start of this winter and flushed. I
All i found was these plastic housings and that is what i took off. I never would have imagined that problem arising before something wat typical. Any ideas?

?
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Old 03-02-2014, 01:35 AM
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03, 2007, 40, 40l, change, ford, hours, housing, labor, lower, metal, mustang, thermostat, thermostate, v6

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