Water temp sender
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=49111
Printed Date: May-01-2025 at 12:33am
Topic: Water temp sender
Posted By: Mpost
Subject: Water temp sender
Date Posted: August-19-2020 at 4:32pm
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A couple weeks ago I finally got around to replacing my Thermostat on my 98 SN with GT40. It was running good but since I purchased it the temp gauge always runs around 150-155. I have verified that my temps were closer to 140-145 with and IR gun. sure enough there was a 143 thermostat in it. After installing the new 160 deg. my temps are now showing in the 170-175 range. Again verified that my temps at the sensor on the water pump and the intake, and heads is in the 160-165 range now. I want to try an new temp sensor and wondered if anyone has a cross reference number for the R020002 PCM number. would like to pick it up locally. TIA   ------------- 84 SN Sold 98 SN Lund Pro V 1975 Alumacraft |
Replies:
Posted By: Duane in Indy
Date Posted: August-19-2020 at 5:47pm
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Looks like thread sealer on the sender. I install mine dry. Might make a difference. Never seen an electric gauge that was right on the money anyhow. ------------- Keep it as original as YOU want it 1978 Mustang (modified) |
Posted By: 8122pbrainard
Date Posted: August-19-2020 at 6:44pm
I see bare brass pipe threads.  ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Duane in Indy wrote:Posted By: KENO
Date Posted: August-19-2020 at 7:00pm
I see a finely manicured thumbnail  Kinda like mine
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Posted By: KENO
Date Posted: August-19-2020 at 8:40pm
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Martin If you want to replace it you'd probably be best off getting the PCM replacement so that you have a sender that's matched to the gauge or you could find one that has the same ohm range of 30 to 240 and is made for a meter with the same range as yours. It's not the easiest thing to do. Jonny Q should be along to tell you all about his temperature gauge experiences. He was on the "replace one a year program" for a while
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Posted By: Jonny Quest
Date Posted: August-19-2020 at 9:47pm
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(KENO...this response is for you) I have bad luck with PCM temp senders. I must be snake-bit. I now buy 'em at Costco by the case... JQ
------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
Posted By: Mpost
Date Posted: August-20-2020 at 8:05am
Ken, Yes they closed the boutique I normally go to so I have to use a rasp file at home!  Where did you see the Ohm for the sender? this one was reading over 500 at about 75 degrees yesterday?Duane, I don't believe there is any sealant on this and I checked for continuity prior to removing and it was 0 ohm to ground. JQ, I've read some of your post about luck with sensors and was wondering where you were getting them  I might take a look at the resistance readings at the gauge VS the sender and see if I have some resistance in the wire somewhere. ------------- 84 SN Sold 98 SN Lund Pro V 1975 Alumacraft |
Posted By: KENO
Date Posted: August-20-2020 at 9:05am
I got the numbers from some Teleflex paperwork that I have. 240 ohms equals 120 degrees 70 ohms equals 180 degrees 30 ohms equals 240 degrees I think it's an industry standard (think is the key word here) Edit ....and the more I think about it, I think it's not a standard Your 500 ish ohm reading at 75 degrees sounds reasonable. See the link below The Teleflex link below has lots of good info on gauges and stuff. Page 22 of 23 has inboard temp gauge info http://www.jamestowndistributors.com/userportal/pdfs/Teleflex/TMTechCat-Instruments%28v4_0%29Tech%20Reference.pdf" rel="nofollow - link Most important thing is that the gauge and sender are matched to each other.
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