FOR THE LS GUYS DOING A SWAP! 3-wire coolant sensor conversion part numbers
05-27-2014, 11:56 PM
#23
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I'm putting an 02 5.3 im my 70 Suburban. At some point, the coolant sensor hole on the front drivers side got stripped out. Can I run the stock 2 wire sensor in the rear of the passenger head, and drill out and tap the other hole for my stock temp guage?
05-28-2014, 04:42 PM
#26
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05-28-2014, 06:35 PM
#27
That would be an expensive lesson if the rumor was wrong. Just because a 1/2" works on a 317 head doesn't mean every other head could be drilled that big. I mean, even GM couldn't accurately locate the water jackets well enough to keep the stock Castech heads from leaking........
I just drilled and tapped the brass block plug for 1/2" NPT since I wasn't happy with the 3 wire sensor modified for my gauge. Oh yeah, also a lot easier to remove the brass plug to drill/tap vs the head in the car.
I just drilled and tapped the brass block plug for 1/2" NPT since I wasn't happy with the 3 wire sensor modified for my gauge. Oh yeah, also a lot easier to remove the brass plug to drill/tap vs the head in the car.
Last edited by garys 68; 05-28-2014 at 06:57 PM.
05-28-2014, 09:50 PM
#29
That would be an expensive lesson if the rumor was wrong. Just because a 1/2" works on a 317 head doesn't mean every other head could be drilled that big. I mean, even GM couldn't accurately locate the water jackets well enough to keep the stock Castech heads from leaking.........
06-06-2014, 11:51 PM
#30
im trying to do this swap right now. My PSI harness came with a 2 prong plug but i want to use my lt1 gauges so im switching to the 3 prong. Bought both the sensor and pigtail from AutoZone but now i dont know what wire is what. The 2 prong is black/yellow, black is obviously ground and yellow is signal to pcm, but on the new pigtail i assume black is ground again but what about the blue and gray one? What one is for the computer and what one is for the gauge?
07-23-2014, 12:20 PM
#31
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Pigtail wiring Hey Tabur did you get anything figured out on yours? I have the exact same dellima. I don't know what colors to hook to psi pigtail. I know the bottom (blue wire) pin goes to the gauge. Not sure if it matters about the other two?
07-27-2014, 08:32 AM
#33
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3 wire coolant gauge first pic shows wiring harness to convert to your harness, has an extra wire( green one) to go to the coolant gauge, 2nd pic shows 3 wire sensor (98) 3rd pic shows ls1 sensor, 3rd pic shows turned down stock 4.3 sensor, turned down. the sensor is 12mm ( fits in the ls head. there is one in each head can use 2ea 12mm sensors if you want to)
as stated before the 98 sensor may not be accurate depends on your gauge.
as stated before the 98 sensor may not be accurate depends on your gauge.
01-31-2015, 07:15 PM
#34
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Sparkwire,
I know I'm bringing back this thread from the archives but where can I order this adapter? My PSI harness has the two wire connector too but I'd rather not cut it off and splice in the 3 wire harness.
I know I'm bringing back this thread from the archives but where can I order this adapter? My PSI harness has the two wire connector too but I'd rather not cut it off and splice in the 3 wire harness.
02-01-2015, 08:03 AM
#35
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3 wire sensor http://api.viglink.com/api/click?for...Truck_Parts_Ac...
would this solve the problem??
would this solve the problem??
Last edited by sparkwirez06; 02-01-2015 at 08:08 AM.
04-14-2020, 04:08 AM
#37
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I am not trying to step on any toes, just provide information for parts I ran into difficulty trying to track down for the conversion process to go smoother for the next bunch who wants to try this swap.
If any of the vendors on here have this item in their inventory, can you please list up a link to it so we can locate these easier?
I have managed to locate the crossover part number for serveral stores to make the 2-wire stock ls plug a 3-wire for the conversion folks who want the temp sensor to work in their swap.
I, myself have a 1993 Chevy S-10 that came with a 4.3L.
But the information provided in a clip I watched was not entirely accurate until AFTER I watched a majority of the clip to get the GM part number.
Well after a bit of diligence, I managed to get the 3-wire crossover from several locations.
GM part number 12551708 crosses over for AC delco with the same number. But for NAPA its an Echlin part number ECH TS5721.
Oreilly's also carries that part under AC Delco.
I have not looked under advance auto parts. or any other stores. Majority of places have a napa. If you are still working on your project and can wait for Rock Auto or whoever to send this to you, feel free to give them a call.
These particular sensors, I assume because of the smaller thread and the crush ring included, are quite expensive. Napa lists it at $28.35 for my zip code, and Oreillys doesn't even show a price due to it being unavailable without ordering it.
I will check my Chevrolet dealer tomorrow and see if they have it. If they do I will post up a price.
Here are the links to pages I found online for finding the one best suited for you:
http://www.oreillyauto.com/site/c/de...yword=12551708
http://www.napaonline.com/Catalog/Ca...721_0379960211
http://www.rockauto.com/catalog/moreinfo.php?pk=816730
http://www.fuelpumpwholesale.com/ite...32&mfr=ACDELCO
If any of the vendors on here have this item in their inventory, can you please list up a link to it so we can locate these easier?
I have managed to locate the crossover part number for serveral stores to make the 2-wire stock ls plug a 3-wire for the conversion folks who want the temp sensor to work in their swap.
I, myself have a 1993 Chevy S-10 that came with a 4.3L.
But the information provided in a clip I watched was not entirely accurate until AFTER I watched a majority of the clip to get the GM part number.
Well after a bit of diligence, I managed to get the 3-wire crossover from several locations.
GM part number 12551708 crosses over for AC delco with the same number. But for NAPA its an Echlin part number ECH TS5721.
Oreilly's also carries that part under AC Delco.
I have not looked under advance auto parts. or any other stores. Majority of places have a napa. If you are still working on your project and can wait for Rock Auto or whoever to send this to you, feel free to give them a call.
These particular sensors, I assume because of the smaller thread and the crush ring included, are quite expensive. Napa lists it at $28.35 for my zip code, and Oreillys doesn't even show a price due to it being unavailable without ordering it.
I will check my Chevrolet dealer tomorrow and see if they have it. If they do I will post up a price.
Here are the links to pages I found online for finding the one best suited for you:
http://www.oreillyauto.com/site/c/de...yword=12551708
http://www.napaonline.com/Catalog/Ca...721_0379960211
http://www.rockauto.com/catalog/moreinfo.php?pk=816730
http://www.fuelpumpwholesale.com/ite...32&mfr=ACDELCO
WOW this is an old thread, but THANK YOU for posting this information!
08-14-2020, 01:17 PM
#38
Here's a diagram and connector end view I found to make this easier. I'll be doing this on my 68 C10 eventually and will update when I do. I'm assuming I will have to change the gauge resistor to get it to read correctly.
Last edited by clay68c10; 08-14-2020 at 01:23 PM.
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SN53 (05-06-2021)
10-14-2020, 03:41 PM
#39
Alternative If you need a 3 wire coolant temperature sensor:
You can use the sensor from the following cars:
Subaru Baja 2003-2006
Subaru Forester 1998-2008
Subaru Impreza 1998-2007
Subaru Legacy 2000-2004
Subaru Outback 2000-2004
Mazda Miata 1999-2005
Mazda Protege 1997-2000
Saab 9-2X 2005-2006
Part numbers:
KLK1-18-840
CS-201
1802-98718
22630AA161
Any engine, any trim level. They all came with the same sensor whether it was an STI or a base model forester.
It has the exact same resistance as the LS coolant temperature sensor and does not need to be calibrated, tuned, nor flashed on any ECU meant to run an LS. It fits the LS cylinder heads the exact same way as the GM sensor. Same thread and same size.
I am using this sensor on an Edelbrock Pro Flo 4 (which uses the existing LS sensors) and my STI gauge cluster. Two wires go to your engine ECU and one wire goes to your gauge.
There is only one caveat with this, you need a used pigtail for the sensor. Luckily, used harnesses and pigtails are cheap for japanese cars. It is unique to this sensor and nothing else uses it.
There is a company called iWire that sells the connector and terminals for this sensor if you would like a new one.
coolant sensor pigtail from iWire
You can use the sensor from the following cars:
Subaru Baja 2003-2006
Subaru Forester 1998-2008
Subaru Impreza 1998-2007
Subaru Legacy 2000-2004
Subaru Outback 2000-2004
Mazda Miata 1999-2005
Mazda Protege 1997-2000
Saab 9-2X 2005-2006
Part numbers:
KLK1-18-840
CS-201
1802-98718
22630AA161
Any engine, any trim level. They all came with the same sensor whether it was an STI or a base model forester.
It has the exact same resistance as the LS coolant temperature sensor and does not need to be calibrated, tuned, nor flashed on any ECU meant to run an LS. It fits the LS cylinder heads the exact same way as the GM sensor. Same thread and same size.
I am using this sensor on an Edelbrock Pro Flo 4 (which uses the existing LS sensors) and my STI gauge cluster. Two wires go to your engine ECU and one wire goes to your gauge.
There is only one caveat with this, you need a used pigtail for the sensor. Luckily, used harnesses and pigtails are cheap for japanese cars. It is unique to this sensor and nothing else uses it.
There is a company called iWire that sells the connector and terminals for this sensor if you would like a new one.
coolant sensor pigtail from iWire
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G Atsma (10-14-2020)
02-02-2023, 11:40 AM
#40
The original resistor on the back of the gauge is 90 ohms. I was able to get this 3-pin sensor to read 210 @ straight up with 150 ohms. That puts it at the left of normal range around 195.
I will do some more testing and see if I can test that factory gauge with the sensor mocked up for hot temp @ 260.
Per the service info in AllData, this is the resistance range for the gauge circuit portion of this sensor:
Coolant Temperature Sensor resistance (approximately 55 ohms at 260°F (hot) and approximately 1365 ohms at 100°F.
pics or it didn’t happen
Last edited by clay68c10; 02-02-2023 at 11:49 AM.