6066 (1960-1966) GMC Truck Club Bitcoin now accepted here! 
Pay Dues
Pay Dues or become a Site Supporter
 



Go Back   6066 (1960-1966) GMC Truck Club > 6066 GMC Truck Club Forum > GMC V6 and V12 Engines


GMC V6 and V12 Engines Engine repair and rebuilding

Reply
 
Thread Tools
  #1  
Old March 22nd, 2023, 07:15 PM
krazzz krazzz is offline
Junior Member
 
Join Date: Mar 2023
Location: Ludington, MI
Truck: 1964 1000
Posts: 6
Rep Power: 0
krazzz is on a distinguished road
Default Installing Oil Pressure, Volts, and Water Temp Gauges

I am looking at installing a set of "triple gauges" for my '64 305E. I would like to keep the factory gauges/idiot lights in place. Is there a way to run both? I can only find one spot for a coolant temp sensor, does anyone know of an alternate location? I don't suppose it's possible to run two gauges off of one sending unit. For the oil pressure, I am guessing it is underneath by the oil filter but I have not found it yet. Need to get it up on a lift. Is there a second port somewhere that I could tap into?
Reply With Quote
  #2  
Old April 1st, 2023, 09:59 PM
LEWISMATKIN's Avatar
LEWISMATKIN LEWISMATKIN is offline
-= Site Supporter =-
 
Join Date: Jan 2013
Location: RIDGE MANOR, FLORIDA
Truck: 1965 1002 GMC V6-305E
Age: 63
Posts: 302
Rep Power: 152
LEWISMATKIN will become famous soon enoughLEWISMATKIN will become famous soon enough
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

yes there is a way to run both. You will need a couple of pipe tee's, 1- 1/2" npt tee, and 1-1/8" pipe tee. For the water, you have two choices--either you can tee off of the water temp port, by manifolding eith a run tee installing the electric unit @ the 90* position, and the manual at the top position, or using the heater port by using the same run tee, installing the manual temp unit at the 90* position, and reinstalling the heater core supply fitting in the top position. personally, i think this is the best choice because flowing water comes across the sensor bulb, due to heater core supply. the oil can be accessed on the top of the oil filter head. this is where you will find oil pressure sender. simply remove the unit and install a 1/8" run tee in its place, then screw the electric unit in the top of the run tee. then install the gauge fitting at the 90* position, making sure to loop enough line to keep it away from the l/h exhaust manifold. i hope this helps you in your gang gauge installation.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #3  
Old April 2nd, 2023, 01:08 AM
Funky61's Avatar
Funky61 Funky61 is online now
-= Dues Paid =-
 
Join Date: Jan 2013
Location: Corona, CA
Truck: 1961 Suburban 1962 GMC Utility
Posts: 1,110
Rep Power: 382
Funky61 is just really niceFunky61 is just really niceFunky61 is just really niceFunky61 is just really nice
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

Just as Lewis suggested (oil Pressure) ...
Attached Images
File Type: jpg IMG_6319.JPG (2.20 MB, Multiple views, 6 clicks)
__________________
1961 GMC Suburban 305A Overdrive
1962 GMC Utility 305D
Reply With Quote
  #4  
Old April 2nd, 2023, 03:41 PM
Clarke Clarke is offline
Senior Member
 
Join Date: Jan 2013
Location: Eureka Springs, AR
Truck: 1962 1500 Wideside 4 speed (305D / SM-420)
Posts: 211
Rep Power: 120
Clarke is on a distinguished road
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

Quote:
Originally Posted by krazzz View Post
I am looking at installing a set of "triple gauges" for my '64 305E. I would like to keep the factory gauges/idiot lights in place. Is there a way to run both? I can only find one spot for a coolant temp sensor, does anyone know of an alternate location? I don't suppose it's possible to run two gauges off of one sending unit. For the oil pressure, I am guessing it is underneath by the oil filter but I have not found it yet. Need to get it up on a lift. Is there a second port somewhere that I could tap into?
I believe I did a write up on here somewhere when I did mine years ago, but for now I took a few photos this morning to share.

I built the triple gauge bracket using 16 ga sheet metal and used the same hole spacing as the above dash knobs. Bought the three gauges (coolant/vacuum/oil pressure) off eBay and I found a couple of period correct gauges (batt & tach) at a swap meet for the original dash cluster. For the batt and tach gauges I had to cut the plastic blanks out of the dash insert using a hole saw.

(Not sure why my two interior photos uploaded upside down?)
Attached Images
File Type: jpeg 44C685C2-D782-4113-826B-C601475EF24C.jpeg (3.98 MB, Multiple views, 17 clicks)
File Type: jpeg BC057D96-D6C1-44FD-A6A7-91BDA4F775B0.jpeg (3.86 MB, Multiple views, 21 clicks)
File Type: jpeg 3BA31DFE-5E99-4D5E-8AC0-5C924416D262.jpeg (1,007.0 KB, Multiple views, 17 clicks)
File Type: jpeg AA54C5D0-0C74-46B3-89F1-AE75E6BDF80E.jpeg (767.5 KB, Multiple views, 13 clicks)
Reply With Quote
  #5  
Old May 10th, 2023, 05:56 PM
jerrspud jerrspud is offline
Member
 
Join Date: Apr 2019
Location: Boise Idaho
Truck: 1963 1500 custom cab
Age: 48
Posts: 31
Rep Power: 35
jerrspud is on a distinguished road
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

nice... is this the "write up"? https://6066gmcclub.com/showpost.php...38&postcount=7

is that a spacer on the temp sender in the block? Will both ports on top of the oil filter have the same pressure?

thanx
Jerr
__________________
Jerr
1963 305 V6 1500

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #6  
Old May 10th, 2023, 07:48 PM
Clarke Clarke is offline
Senior Member
 
Join Date: Jan 2013
Location: Eureka Springs, AR
Truck: 1962 1500 Wideside 4 speed (305D / SM-420)
Posts: 211
Rep Power: 120
Clarke is on a distinguished road
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

Quote:
Originally Posted by jerrspud View Post
nice... is this the "write up"? https://6066gmcclub.com/showpost.php...38&postcount=7

is that a spacer on the temp sender in the block? Will both ports on top of the oil filter have the same pressure?

thanx
Jerr
Thanks Jerr! Yes, thatís the write up on the triple gauge installation I did, and I believe I did another write up on adding the two period correct batt and tach gauges. Unfortunately, I just realized I should have included a full list of part numbers to assist with follow-on questions.

In ref to your temp sensor question, Iím rusty on the details, as I did this almost ten years ago. I believe the existing threads in the engine block are NPT (pipe threads) and the sensor threads may be standard or tubing? So instead of a spacer, I believe itís simply a fitting to get the proper thread mating/engagement. Then I double nutted the wire connector onto the sensor stem.

In ref to your oil pressure question, I believe the pressure would be the same at both ports, but I would double check to see if those ports share the same internal cavity. There may be an integrated cast stiffening rib on the under side between the two ports, but it may or may not act as a divider? Perhaps someone has one laying around they can post a photo of to validate.
Reply With Quote
  #7  
Old May 11th, 2023, 03:59 PM
jerrspud jerrspud is offline
Member
 
Join Date: Apr 2019
Location: Boise Idaho
Truck: 1963 1500 custom cab
Age: 48
Posts: 31
Rep Power: 35
jerrspud is on a distinguished road
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

Those two gauges are really nice for sure. That would be the only time I cut into the original cluster.
__________________
Jerr
1963 305 V6 1500

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #8  
Old June 30th, 2023, 05:33 AM
Fullmsrp Fullmsrp is offline
-= Site Supporter =-
 
Join Date: Aug 2022
Location: New Westminster, BC
Truck: 1966 1500 3/4
Age: 55
Posts: 8
Rep Power: 0
Fullmsrp is on a distinguished road
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

Gauges you say? Wish I could help you technically but I am still in the investigation phase tracing it all around. Three gas tanks and switching also need some study time.
Attached Images
File Type: jpeg IMG_8907.jpeg (132.3 KB, Multiple views, 9 clicks)
File Type: jpeg IMG_8906.jpeg (111.5 KB, Multiple views, 5 clicks)
File Type: jpeg IMG_8904.jpeg (144.1 KB, Multiple views, 9 clicks)
File Type: jpeg IMG_8903.jpeg (3.32 MB, Multiple views, 4 clicks)
Reply With Quote
  #9  
Old July 8th, 2023, 10:43 PM
AZKen's Avatar
AZKen AZKen is offline
Senior Member
 
Join Date: Jul 2014
Location: AZ
Truck: 6066GMC
Posts: 1,574
Rep Power: 485
AZKen is just really niceAZKen is just really niceAZKen is just really niceAZKen is just really nice
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

1. Two gauges on the same sender will not defeat your paranoia. If the sender fails, no back up.
2. Pressure related sensing depends on if gauge is mechanical or electrical digital/analog or idiot light. Different electrical sender for each.... and no sender for mechanical.
3. Heat related sensing will need different "senders". Two locations in water jacket. Same issue with mechanical and electrical and digital, analog, idiot light.
4. An "idiot" light/indicator is sufficient. Easily noticed and has a key-on bulb check mode usually. No gauge to malfunction.
5. Worrying can casue health issues. These motors just need some oil and some water. Hang down hot rod gauges is old school and not original looking. We did that when gauges went bad so we didn't have to pay for an original AT THE DEALER or dig into the dash. We also saw the cool dragster guys do it.

A GMC V6 ain't no hot rod. It was designed and built specifically for torque and SUPER reliability. 200,000-300,000 miles IN THE 1960's!!!!!!!!!!!!!!

Last edited by AZKen; July 8th, 2023 at 11:14 PM.
Reply With Quote
  #10  
Old July 9th, 2023, 04:06 PM
Clarke Clarke is offline
Senior Member
 
Join Date: Jan 2013
Location: Eureka Springs, AR
Truck: 1962 1500 Wideside 4 speed (305D / SM-420)
Posts: 211
Rep Power: 120
Clarke is on a distinguished road
Default Re: Installing Oil Pressure, Volts, and Water Temp Gauges

Quote:
Originally Posted by Fullmsrp View Post
Gauges you say? Wish I could help you technically but I am still in the investigation phase tracing it all around. Three gas tanks and switching also need some study time.
Wow! Starting to look like a cockpit in an airplane.

Do you have departing checklist?
Reply With Quote
Reply

Bookmarks

Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Installing Mechanical Water Temp Gauge Clarke Interiors, Dash, Lights and Electrical 10 April 7th, 2015 03:17 AM
Water Temp & Oil Pressure Senders? Archiver Previous Forum Posts 4 January 30th, 2012 12:06 AM
Re: Operating temp/ pressure Archiver Previous Forum Posts 0 September 23rd, 2008 01:57 AM
Operating temp/ pressure Archiver Previous Forum Posts 0 September 22nd, 2008 01:19 AM
fuel/temp gauges Archiver Previous Forum Posts 0 November 15th, 2002 02:18 AM


All times are GMT +1. The time now is 11:53 PM.


Powered by vBulletinģ Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 811695920529|1694818422|0
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2023 DragonByte Technologies Ltd.