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Old 08-18-2012, 08:50 AM
DavidXLTRanger DavidXLTRanger is offline
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Question Need help- coolant sensor location and quantity

I'm looking to replace my Engine coolant sensor on my 98 ranger 4 cyl. And I can see where there are sensors on the intake manifold by the radiator hose , however there are 2 sensors...

One has a black connector and one has a red connector

Are these both coolant sensors? if not which one is?

I would appreciate anyone who knows..
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Old 08-18-2012, 09:09 AM
RoberticusMaximus RoberticusMaximus is offline
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Default Re: Need help- coolant sensor location and quantity

one is the coolant temp sensor for the computer, the other is the coolant temp sender for the instrument cluster temp gauge. can't remember off hand which is which.

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and they are not on the intake manifold. they are on the 'thermostat housing', which is a black plastic piece with the upper radiator hose & a heater hose coming out of it.

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another thing...if you are going to replace them, i suggest flushing the coolant & replacing the thermostat while you are in there. you can get it all done in a few hours.
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Old 08-18-2012, 09:55 AM
19White99 19White99 is offline
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Default Re: Need help- coolant sensor location and quantity

Haha I had to change my thermostat in my 99 2.5L. NOT FUN!

But good luck
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Old 08-18-2012, 02:35 PM
DavidXLTRanger DavidXLTRanger is offline
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Question Re: Need help- coolant sensor location and quantity

Okay this all makes sense

It probably is about time for a new thermostat too


Another question is when buying the engine coolant sensor are their two different ones I have to buy since one is for the gauge and the other for the light? Or is it the same sensor for both? I'm just wondering because o Reilly doesn't really specify

There was a regular one though for motorcraft that was 11 bucks and then a superseded one for about 20

I'm just confused... And the haynes manual isn't helping
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Old 08-18-2012, 03:56 PM
19White99 19White99 is offline
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Default Re: Need help- coolant sensor location and quantity

Sorry man wish I could answer your question, the one thing i can tell you is when you change your thermostat make sure you have HELP because if its the 8 plug motor like mine it is a pain in the arse
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Old 08-18-2012, 04:18 PM
RoberticusMaximus RoberticusMaximus is offline
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Default Re: Need help- coolant sensor location and quantity

Quote:
Originally Posted by DavidXLTRanger View Post
Okay this all makes sense

It probably is about time for a new thermostat too


Another question is when buying the engine coolant sensor are their two different ones I have to buy since one is for the gauge and the other for the light? Or is it the same sensor for both? I'm just wondering because o Reilly doesn't really specify

There was a regular one though for motorcraft that was 11 bucks and then a superseded one for about 20

I'm just confused... And the haynes manual isn't helping
unfortunately they are different. if you took them out of the housing, you'd see that the inside tips are different...but that's the only realistic way to tell (since the plugs are identical shapes).

about the thermostat. be sure you have a replacement thermostat as well as a new oring to seal it back to the block outlet. and clean the surface of the block where they meet...you'll see.

i believe the thermostat housing is held onto the engine block with 2 (two) 8mm (maybe 10mm) bolts. you'll need an extension on a 1/4 inch ratchet to get them out.

and be sure to let all the coolant out of the engine from the lower radiator hose. else, coolant will get all over the alternator and a/c and everywhere else.

if i think of anything else, i'll try to post it here...

...i thought of something else... it may seem like the a/c line is in the way, but it can be worked around.
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Old 08-18-2012, 05:08 PM
sheltonfilms sheltonfilms is offline
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Default Re: Need help- coolant sensor location and quantity

Just to confirm it is 2 8mm bolts holding the thermo housing on. Best way to change a thermostat on the 2.5 is to remove the fan and shroud. The top bolt is the easiest the bottom one you have to either feel or get a mirror to see it. Its easiest to use an extension with a wobble tip because the a/c line is in the way of getting a straight shot to the bolt.
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Old 08-18-2012, 05:49 PM
RoberticusMaximus RoberticusMaximus is offline
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Default Re: Need help- coolant sensor location and quantity

Quote:
Originally Posted by sheltonfilms View Post
Just to confirm it is 2 8mm bolts holding the thermo housing on. Best way to change a thermostat on the 2.5 is to remove the fan and shroud. The top bolt is the easiest the bottom one you have to either feel or get a mirror to see it. Its easiest to use an extension with a wobble tip because the a/c line is in the way of getting a straight shot to the bolt.
thanks anthony, i couldn't have said it better!

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on the fan and shroud, i've found the easiest way is to take the 2 10mm bolts of the top of the shroud, and then the 4 10mm bolts off of the fan assembly against the water pump pulley. then you can pull both up and out at the same time. (if there's a better way, let me know anthony).

story time!
when i tried the thermostat initially, i didn't remove the fan, and it was hell. i took the fan off to reinstall though it was embarrassing.

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and yes, i set up a mirror and a light to see the bolt anthony mentioned above.
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coolant, coolant sensor, engine coolant, lower intake sensor

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