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05 Sport Trac 4L thermostat housing

09-06-2014, 04:14 PM
My thermostat housing assy. has split open at the lower seem twice in the last 7 months, both times while traveling... anyone else have this issue ???
I have the stock 16lb rad cap..
all else seems fine ?????
I'm at a lose...
any ideas ?????
thinking I should fix it and get rid of it at this point ???

09-07-2014, 11:17 AM
You might check the cap. It is suppose to release excess pressure to the overflow. If the cap is bad, maybe its not releasing.

09-07-2014, 12:56 PM
In addition to testing the pressure cap, have you carefully inspected the mating surfaces for any deformities and confirmed that you are properly torquing the housing during installation?


09-07-2014, 09:40 PM
I inspected the cap.. it seems to release freely... Idk could be not releasing at the correct pressure...
The mating surface and torqueing are good..
I'm just not sure I trust traveling with this rig anymore...

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