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Unread 11-22-2011, 10:37 AM   #1
moonshinefuel
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1995 temp sensor

I am looking for a coolant Temp sensor, I believe there are two on the 1995 with 2.5 engine. If so, I need the small one on the back of the top of the cylinder head. Dealerships are telling me the small sensor on the top of the back of the cylinder head does not exist. I see one there. Does anyone have a part number, or info on this sensor, I think it is for the Temp gauge as mine is not working.

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Unread 11-22-2011, 10:43 AM   #2
94chb
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the temp sensor is on the thermostat housing
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Unread 11-22-2011, 11:54 AM   #3
Jeepfan1
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ditto. I just looked at my 95 2.5 and I see no sensor on the back just the one in the thermostat housing up front
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Unread 11-22-2011, 12:02 PM   #4
tdewit
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Quote:
Originally Posted by moonshinefuel View Post
I am looking for a coolant Temp sensor, I believe there are two on the 1995 with 2.5 engine. If so, I need the small one on the back of the top of the cylinder head. Dealerships are telling me the small sensor on the top of the back of the cylinder head does not exist. I see one there. Does anyone have a part number, or info on this sensor, I think it is for the Temp gauge as mine is not working.
The 95 2.5 has a temp sensor on the drivers side / firewall corner of the head. NAPA part number ECH TS3001
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Unread 11-22-2011, 12:48 PM   #5
Apollo12227
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OP, I'll post a link to my thread. The dealer should be able to pull the part for you, I bought mine at the dealer because three separate senders from three separate auto parts stores all read 30* hot. Maybe the nappa part referenced above will read correct but advance and autozone both left me reading 30* hotter than I was actually running.

http://www.jeepforum.com/forum/f12/y...ffect-1035824/

Above is my thread, it took 117 posts to figure out I was getting sold inaccurate temp senders. I spent nearly 1K on the cooling system including radiator, flex-a-light fan, water pumps, countless thermostats, and the list goes on. You should unscrew the sender and slap it on the desk in the dealership and tell him to tell you it doesn't exist again. Maybe you are wording it wrong... It's the "temp sender for the dash gauge, it has one purple wire going to it." If you have to drive the jeep there then drag is idiot a** outside and show him. I hate dealing with the dealership, some are great but most are nearly incompetent.
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Unread 11-22-2011, 12:49 PM   #6
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Quote:
Originally Posted by 94chb View Post
the temp sensor is on the thermostat housing
Quote:
Originally Posted by Jeepfan1 View Post
ditto. I just looked at my 95 2.5 and I see no sensor on the back just the one in the thermostat housing up front
The sensor on the t-stat housing is for the ECM, the sender (one purple wire on the back of the head) goes to the gauge. I assure you that if you have a 2.5, ho4.0 you have a temp sender on the back of your head with one wire going to it. If you don't believe me, unplug the temp sensor at the tstat after your engine heats up and I'll bet you that your gauge still works.
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Unread 11-22-2011, 01:46 PM   #7
94chb
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nope my 4.0 only has a sensor on t-stat housing and none on back of head. now i know what your talking about cause ive seen a few xj's with the little white single wire sensor in the back driver side of the head inbetween the intake mainfold and valve cover..
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Unread 11-22-2011, 02:39 PM   #8
Apollo12227
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Originally Posted by 94chb View Post
nope my 4.0 only has a sensor on t-stat housing and none on back of head. now i know what your talking about cause ive seen a few xj's with the little white single wire sensor in the back driver side of the head inbetween the intake mainfold and valve cover..
Your profile says you have a 4.2, which is not a 4.0... The OP has a Chrysler so it will have a sender at the back of the block. Especially a 95. What vehicle make and year is this 4.0HO without a sender at the back of the head?
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Unread 11-22-2011, 03:01 PM   #9
94chb
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Originally Posted by Apollo12227 View Post
Your profile says you have a 4.2, which is not a 4.0... The OP has a Chrysler so it will have a sender at the back of the block. Especially a 95. What vehicle make and year is this 4.0HO without a sender at the back of the head?
if you looked at my profile you would have seen SWAPPED TO 4.0 H.O Fuel injected and also swapped from auto to manual

i pulled everything from a 91 wrangler and installed it into my 89
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Unread 11-22-2011, 03:20 PM   #10
Apollo12227
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Weird, maybe because it was such an early year 4.0? I dunno all I can say is a 95 Chrysler 2.5 has a sender on the head lol.
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Unread 11-22-2011, 03:24 PM   #11
94chb
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yea i got a 92 xj sittin here in the yard that im putting a 98 motor in and the 92 engine had the temp sensor on the back of the head, but the 98 didnt so i took it off the 92 and installed it onto the 98.
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Unread 11-22-2011, 06:58 PM   #12
moonshinefuel
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When dealerships get confused on this, that's pretty bad. They couldnt help me. Thanks for all the help here. I will post 3 images in the next 10 mins or so. I purchased these today at Kragen/Orielly auto parts. The small sensor is tucked under the fuel injector rail rear side of the cylinder head, drivers side, threading streight down into the cylinder head. They called it a "light sensor", it is for the gauge. It's kind of hard to see unless you are looking for it, and know where it is. Why they call it a light sensor, not sure why, but they do, at kragens. It was approx 12 dollars. The third image will be the one we all see, the one in the thermostat housing. On the boxes, are the part numbers.


Below is the sensor that
Threads into the thermostat
Housing. Over 20 dollars.
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Unread 11-22-2011, 08:08 PM   #13
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The one with the little white cap is obviously the winner. The other like you said is for the housing. They are under the assumption that you have a dummy light setup above a gauge setup? I dunno I never try to explain dealership madness lol. Anyways, hope it reads accurate! Oh and PS, be careful handling the sensor as a socket will knock (break off) off the plastic part where the wire cOnnects very easily.
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Unread 11-09-2013, 02:50 PM   #14
MCI
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Hi,
This post helped me. I found the sensor at AutoZone:
Temperature Switch
Duralast TU236
$13
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Unread 11-09-2013, 03:22 PM   #15
Apollo12227
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Glad to hear.

Keep in mind I tried about 4 different temp sensors from advance and autozone and all of them read 30* hot than what the actual engine temp was.

I had to buy a sender from the dealership in order to get my gauge to read accurate. Spent nearly $1,000 on the cooling system chasing an imaginary overheating problem because of those dang temp senders. Not sure if the inaccuracy is nation wide or not, but several senders from both advance and autozone read hot.
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