Water temp gauge
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Water temp gauge
Motor back in, installed new temp sending unit, wire connected, not getting a reading on the water temp gauge. Sending unit was supposed to be for a 73 Chevy small block. Is it possible the thread sealant is blocking the signal? Could it be an incorrect sending unit? Thanks for any thoughts.
Burning Brakes
Joined: Feb 2011
Posts: 850
Likes: 12
From: Shakopee MN
Do the test Mel outlined. Is yours just not moving at all or just reads incorrectly?
Lots of information about temp sensors on this forum. This is one that I joined in when I had my problems with incorrect temp senders: https://www.corvetteforum.com/forums...ding-unit.html
Lots of information about temp sensors on this forum. This is one that I joined in when I had my problems with incorrect temp senders: https://www.corvetteforum.com/forums...ding-unit.html
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Motor back in, installed new temp sending unit, wire connected, not getting a reading on the water temp gauge. Sending unit was supposed to be for a 73 Chevy small block. Is it possible the thread sealant is blocking the signal? Could it be an incorrect sending unit? Thanks for any thoughts.
As mentioned above, pull the wire off the sender, the gauge should go to cool, ground it and it should peg out.... this will narrow down your search. If the gauge works as shown in the video below, then put a multi-meter on the sender and see what the ohm output is.
Testing a 68-76 Temperature Gauge -or- What your non working gauge can tell you!
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Water temp gauge
What is the gauge doing??? Always the first question for me and then watch the video below. Is it possible they sold you a sender for a passenger car? It's happened before! What part number did you purchase and I'll tell you.
As mentioned above, pull the wire off the sender, the gauge should go to cool, ground it and it should peg out.... this will narrow down your search. If the gauge works as shown in the video below, then put a multi-meter on the sender and see what the ohm output is.
Testing a 68-76 Temperature Gauge -or- What your non working gauge can tell you!
As mentioned above, pull the wire off the sender, the gauge should go to cool, ground it and it should peg out.... this will narrow down your search. If the gauge works as shown in the video below, then put a multi-meter on the sender and see what the ohm output is.
Testing a 68-76 Temperature Gauge -or- What your non working gauge can tell you!
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I'm still working on the tech side of the site and I should have posted this for you with the other video.. 
It makes it easier to diagnose. But it is pointing exactly at 100 as shown below that's probably the issue.
But.. before I went there, I would test the dash unit by grounding out the sender wire at the gauge first! If it moves then the issue is somewhere else or the sold you the wrong sender.
It makes it easier to diagnose. But it is pointing exactly at 100 as shown below that's probably the issue. But.. before I went there, I would test the dash unit by grounding out the sender wire at the gauge first! If it moves then the issue is somewhere else or the sold you the wrong sender.
Last edited by Willcox Corvette; May 8, 2015 at 03:03 PM.
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Water temp gauge
I'm still working on the tech side of the site and I should have posted this for you with the other video.. It makes it easier to diagnose. But it is pointing exactly at 100 as shown below that's probably the issue.
But.. before I went there, I would test the dash unit by grounding out the sender wire at the gauge first! If it moves then the issue is somewhere else or the sold you the wrong sender.
It makes it easier to diagnose. But it is pointing exactly at 100 as shown below that's probably the issue. But.. before I went there, I would test the dash unit by grounding out the sender wire at the gauge first! If it moves then the issue is somewhere else or the sold you the wrong sender.
Racer
Joined: Jan 2013
Posts: 302
Likes: 2
From: Sayville New york
perhaps we should save the 3/8" NPT orifice in the AFR heads for the temperature sending unit for the dual fans.one fan switch at 195 degree in one head a the other head at 180 degrees.use the 1/2 NPT hole in the intake manifold for the OEM temp. sending unit.
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Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15