The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-20-2015, 06:40 AM   #1
missallpc
Registered User
 
Join Date: Jun 2015
Location: Gainesville, FL
Posts: 26
temp sender

I have a '57 3100 with a 235 six. At a running temperature of about 170 the gauge moves only about 1/8 of it's range. Since there are no numbers I don't know if it is accurate. What should be the resistance range of the sender and is it safe to assume that at running temp the gauge needle should be approx straight up.

Thanks Paul
missallpc is offline   Reply With Quote
Old 10-20-2015, 07:40 AM   #2
1project2many
Registered User
 
Join Date: Mar 2012
Location: Lakes Region NH
Posts: 3,144
Re: temp sender

The owner's manual indicates that the temp gauge needle should be near the center of the gauge at operating temp.

There are several different temperature senders available and not all work properly. And there are multiple temp range thermostats available, not all of which are accurate. Can you get an infra-red gun to check engine temp at the thermostat outlet?

This thread has a part number for a Napa sender and also has a chart I posted for a sender I used.
http://67-72chevytrucks.com/vboard/s...d.php?t=571910
1project2many is offline   Reply With Quote
Old 10-21-2015, 10:05 PM   #3
Janky59
Registered User
 
Janky59's Avatar
 
Join Date: Feb 2015
Location: Salisbury, MD
Posts: 91
Re: temp sender

There is a good thread about senders in this thread:

http://www.67-72chevytrucks.com/vboa...d.php?t=516389

In post #13 there is info on the sending unit that worked for me. My needle runs slightly below half way of the indicating line, '59 w/ stock 235.
__________________
2018 BMW R1200RT
2013 Aprilia Tuono
2012 Ford Flex
2011 Ducati Hypermotard
1959 Chevy 3100
Janky59 is offline   Reply With Quote
Old 10-21-2015, 10:15 PM   #4
Coupeguy2001
Registered User
 
Coupeguy2001's Avatar
 
Join Date: Aug 2011
Location: phoenix az
Posts: 723
Re: temp sender

My 57 has an 89 corvette 350, and I am still running the original temp gauge and sender unit.
at 160, the gauge is at the left side of the gauge about 1/8 up the white line. I have had this truck for about 45 years and have had 6 different engines in it, and they all run in the same range with a 160 thermostat.
(chevy v8's, as my truck was a v8 from the factory)
with a 180 thermostat, the needle is closer to 1/3 up the white line.
I have to believe the sender units for the 6 and the 8's are all the same since they all use the same gauge except for the early 6 cyl's were a bourdon tube type gauge with the copper tube attached.
Coupeguy2001 is offline   Reply With Quote
Old 10-22-2015, 05:53 AM   #5
missallpc
Registered User
 
Join Date: Jun 2015
Location: Gainesville, FL
Posts: 26
Re: temp sender

Thanks to all for the info.
missallpc is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:53 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com