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I just picked up a coolant temp sensor to see if that fixes the problem with my CEL. My question is, should I drain out the coolant before I change it or would it be ok to just swap it out real quick without draining the coolant?
Thanks in advance
2001 Volvo S40-Perrin MBC@ 11psi, EST intake, 35% tint, still slow
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all the temp sensor does is send the approx tempature to the guage it does not have anything to do with the cars computer. however the temp sender is the thing that sends the message to the computer. in answer to your question i dont beleave you have to drain your coolent to change the sensor or sender. i was reading about this about a week ago and i dont have my book with me right now so i am only 85% sure
RIP Frank Foreman. March 15 2005. died in a tragic car crash at the age of 18.<Drive Safe>
1995 Contour gl Zetec auto.
178000km
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Originally posted by realslimshaver:
all the temp sensor does is send the approx tempature to the guage it does not have anything to do with the cars computer. however the temp sender is the thing that sends the message to the computer. in answer to your question i dont beleave you have to drain your coolent to change the sensor or sender. i was reading about this about a week ago and i dont have my book with me right now so i am only 85% sure
your wrong about that!!!! the ect works to help the computer determine the temp of the engine, to help it determine wether the car needs more or less gas,to add or pull timing.......so yes it does have alot to do with the cars computer....ceebee, you wont change it fast enough not to lose any coolant but if done quickly you'll only lose a small amount...it comes down to wether or not you wont coolant on the floor/ground...
"Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but STUPID lasts forever."-Aristophanes.
--93 pgt,headers,intake,borla=14.9 1/4mile
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Yea, thats what I figured. I am just going to do it out in the street so I wouldn't care if a little coolant leaked out. Do you happen to have a pic of the location of the ECT by any chance because I went out real quick to see if I could find it, but I didn't see it. I took off the accordian tube and looked around under there but didn't see anything.
Thanks again for the help and hopefully this fixes my problem.
2001 Volvo S40-Perrin MBC@ 11psi, EST intake, 35% tint, still slow
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Joined: Nov 2004
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sorry that was my mistake. i finaly found my book the sender is for the gauge and the sensor is for the computer. and according to haynes chapter 3 part 6 "on v6 models the coolant temperature gauge is located in the water crossover " i cant post the pic because i am on my handheld computer but ut appears to be right bescide the auto trans dipstick
Last edited by realslimshaver; 02/21/05 09:18 PM.
RIP Frank Foreman. March 15 2005. died in a tragic car crash at the age of 18.<Drive Safe>
1995 Contour gl Zetec auto.
178000km
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Thanks for the help. Mine is an SVT so its not an auto, but I will take another look again possibly tomorrow since I have to go to work now.
Thanks again
2001 Volvo S40-Perrin MBC@ 11psi, EST intake, 35% tint, still slow
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Joined: Nov 2004
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this is directly from haynes chapter 3 page 6 . " if the gauge indicates hot shortly after the engine is started from cold, disconnect the coolant temperature sender's electrical connector. if the gauge reading drops replace the sender. if the reading remains high, the wire to the gauge may be shorted to ground or the gauge is falty.
if the gauge fails to indicare after the engine has been warmed up(about 10 minutes)and the fuses are sound, stwich off engin,dissconnect the senders ellecrtical connector and use a jumper wire to connect the red/white wire to a cleen grounding point on the engin. stwich the ignition to on with out starting it. if the gauadge is now hot replace t he sender.
if the gauge still doesent work the circuit may be open or the gauge may be faulty"
RIP Frank Foreman. March 15 2005. died in a tragic car crash at the age of 18.<Drive Safe>
1995 Contour gl Zetec auto.
178000km
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I looked at were mine was on the car and said screw it...I am bringing it in. The changed it and the main mechanic gave the guy who worked on it a little grief cause he complained that it was a really tight fit to get at it.  SO have fun with it.
95 SE MTX
svt exhaust
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deer killer
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"Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but STUPID lasts forever."-Aristophanes.
--93 pgt,headers,intake,borla=14.9 1/4mile
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I haven't had time to go work on it because of work and whatnot. I am gonna go take another quick look at it right now before I head to work, hopefully I can find it.
2001 Volvo S40-Perrin MBC@ 11psi, EST intake, 35% tint, still slow
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