Possible thermostat problem???
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Freshman User
Joined: Dec 2003
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Possible thermostat problem???
99 -- V6 -- 4.0L -- 55K
Engine started to over heat "Check Gages" light came on.
Whoa!! Neddle pegged -- "Houston We have a problem!"
So I pull over and shut down the engine. I pop the hood to check a few of the following.
Top engine coolant hose is hot
There is engine coolant in resivoir -- it looks healthy
Belt is fine
So I start it back up and I head for home 4 blocks away. I crank the heater and the temp goes down a bit. As I make a finall approach to the driveway I turn off the heater and the temp starts to climb.
Do thermostats give intermitant problems? That is, can I still have a hot top hose and a closed thermo -- could it be that its operating sporatically?
What else???????
What else could it be
Engine started to over heat "Check Gages" light came on.
Whoa!! Neddle pegged -- "Houston We have a problem!"
So I pull over and shut down the engine. I pop the hood to check a few of the following.
Top engine coolant hose is hot
There is engine coolant in resivoir -- it looks healthy
Belt is fine
So I start it back up and I head for home 4 blocks away. I crank the heater and the temp goes down a bit. As I make a finall approach to the driveway I turn off the heater and the temp starts to climb.
Do thermostats give intermitant problems? That is, can I still have a hot top hose and a closed thermo -- could it be that its operating sporatically?
What else???????
What else could it be
Postmaster
Joined: Aug 2003
Posts: 2,873
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From: St. Peter
i'd just replace the thermostat for good measure, they're what, about 5 bucks and 3 screws, it sounds like it could be a possibility, even if its not, you may have saved yourself some hassel in the future, it sounds like its definatly a cooling problem if the temp goes down when you turn on the heater, and if the thermostat was part way open, it might let enough water through to heat up the upper hose, but not cool the engine efficiently, i'd say new thermostat
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Freshman User
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Problem solved
New thermostat
However, i wanted to use Motocraft but dealer is not walking distance away. Went with NAPA (The better one). Still does not look like the quality is as high as OEM.
Anyone care to comment?
Thanks for the info
Happy new year.
Jon
New thermostat
However, i wanted to use Motocraft but dealer is not walking distance away. Went with NAPA (The better one). Still does not look like the quality is as high as OEM.
Anyone care to comment?
Thanks for the info
Happy new year.
Jon
Cargo Master
Joined: Aug 2003
Posts: 3,237
Likes: 3
From: Belleville, Ontario
Don't worry about the NAPA stat. You're familiar with your trucks behavior now and will know if it fails.
Personal preference is dealer, but they aren't walking distance for me either.
Personal preference is dealer, but they aren't walking distance for me either.
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Mountain Pass
Joined: Dec 2003
Posts: 197
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A few months back I was having problems with my 89 mustang coming close to overheating. This was after a radiator flush and it had been sitting for a few months over the summer. The problem apparantly worked itself out so I didn't change the thermostat or anything.
One thing I learned over the web is that many tried replacement or performance thermostats and eventually went back to Motorcraft after unsatisfactory results or problems with other brands. I would say if you NAPA works, great, if not make your next purchase a Motorcraft. Like Dealford said you know what it is supposed to do.
One thing I learned over the web is that many tried replacement or performance thermostats and eventually went back to Motorcraft after unsatisfactory results or problems with other brands. I would say if you NAPA works, great, if not make your next purchase a Motorcraft. Like Dealford said you know what it is supposed to do.
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Postmaster
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From: St. Peter
I've had my napa thermostat in for 2k now and its still working great, also what temp did you get, 180 or 193-195? i got the 180, but i wonder if i'm not supposed to have the hotter one in there since my engine temp gauge reads low all the time,
