Wrong Oem Thermostat?!
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Joined: Dec 2003
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Wrong Oem Thermostat?!
HI GUYS,
I'm the proud new owner of a 1999 Ford ranger supercab 4x4 with a 4.0 L engine. On my drive from the previous owner's garage, i noticed that the temp gauge only moved a little and temp from heater was so-so. I went to NAPA and got a 192/195 thermostat. When I went to R&R, I found that the old one was 92/106-made in germany-motorcraft. Temp great now and gauge comes just beyond 1/2 way. I've never encountered this before, but is there any possible damage that could have resulted? Has 80k for miles and seems to run ok. Do I need to disconnect 12v from battery so computer can "relearn"?
Happy New Owner,
of metallic dark blue,
nearly perfect,
Kicks Butt-Ranger
I'm the proud new owner of a 1999 Ford ranger supercab 4x4 with a 4.0 L engine. On my drive from the previous owner's garage, i noticed that the temp gauge only moved a little and temp from heater was so-so. I went to NAPA and got a 192/195 thermostat. When I went to R&R, I found that the old one was 92/106-made in germany-motorcraft. Temp great now and gauge comes just beyond 1/2 way. I've never encountered this before, but is there any possible damage that could have resulted? Has 80k for miles and seems to run ok. Do I need to disconnect 12v from battery so computer can "relearn"?
Happy New Owner,
of metallic dark blue,
nearly perfect,
Kicks Butt-Ranger
Cargo Master
Joined: Aug 2003
Posts: 3,237
Likes: 3
From: Belleville, Ontario
Welcome to FTE korysandman.
First apply the "keep it simple" rules. It's not to likely that running it "cold" has done any harm. The computer has probably re-learned already, so leave it to do it's thing.
Enjoy your new truck. They are North Americas best selling mini truck for a reason you know. By popular opinion, they ARE the BEST.
First apply the "keep it simple" rules. It's not to likely that running it "cold" has done any harm. The computer has probably re-learned already, so leave it to do it's thing.
Enjoy your new truck. They are North Americas best selling mini truck for a reason you know. By popular opinion, they ARE the BEST.
Freshman User
Joined: Sep 2003
Posts: 47
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From: Central Kentucky
I have a '99 Mazda B4000 4.0L. While under warranty it made an unusual noise at the radiator which the dealer said was sort of a vapor lock condition and installed a factory by-pass kit. This consisted of a fitting at the temp sensor with a by-pass hose that tied into the lower radiator hose that allowed a certain amount of coolant to always bypass the thermostat. Anyway, after that was installed I had constant problems with the truck reaching temperature in the winter and removed the by-pass kit. The truck still didn't reach temp and I checked the thermostat and discovered the dealer had also replace the OEM with what appeared to be a 160 deg. thermostat. Replaced it and no problems since. Might want to see if you have a bypass kit and maybe the incorrect thermostat was installed due to that. Doesn't help but solves a mystery.
Junior User
Joined: Jan 2004
Posts: 56
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From: Augusta Kansas
I am reviving a month old post, but I too just pulled a Motorcraft thermostat out of my 95 Ranger 4.0 V6. It also says "Made in Germany." It is also a 92/106 that I believe was partially stuck open, causing the truck to run cold. My guess is the reason the thermostat says 92/106 is because the Germans use celcius instead of farenheit. 92 celcius = 197 farenheit.
Anyway, I replaced it with a 195 degree Napa Superstat #533090. It does not have the small "air bleeder" valve on it. It seems to work fine, so is anyone aware of any problem this will cause other than taking a little longer to bleed the air out of system after refilling with coolant?
Anyway, I replaced it with a 195 degree Napa Superstat #533090. It does not have the small "air bleeder" valve on it. It seems to work fine, so is anyone aware of any problem this will cause other than taking a little longer to bleed the air out of system after refilling with coolant?
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
Originally posted by BubbaP
I am reviving a month old post, but I too just pulled a Motorcraft thermostat out of my 95 Ranger 4.0 V6. It also says "Made in Germany." It is also a 92/106 that I believe was partially stuck open, causing the truck to run cold. My guess is the reason the thermostat says 92/106 is because the Germans use celcius instead of farenheit. 92 celcius = 197 farenheit.
Anyway, I replaced it with a 195 degree Napa Superstat #533090. It does not have the small "air bleeder" valve on it. It seems to work fine, so is anyone aware of any problem this will cause other than taking a little longer to bleed the air out of system after refilling with coolant?
I am reviving a month old post, but I too just pulled a Motorcraft thermostat out of my 95 Ranger 4.0 V6. It also says "Made in Germany." It is also a 92/106 that I believe was partially stuck open, causing the truck to run cold. My guess is the reason the thermostat says 92/106 is because the Germans use celcius instead of farenheit. 92 celcius = 197 farenheit.
Anyway, I replaced it with a 195 degree Napa Superstat #533090. It does not have the small "air bleeder" valve on it. It seems to work fine, so is anyone aware of any problem this will cause other than taking a little longer to bleed the air out of system after refilling with coolant?
Good question about the bleeder valve! In all honesty, I would not be comfortable with a T-Stat in my 4.0L Ranger that did not have the bleeder valve. Apparantly some 95+ 4.0L Rangers have had problems with air getting stuck in the T-Stat housing area, there is even a TSB on it.
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