ForumsBasic TrainingOnline Maintenance ManualsThe M715 Zone Vin RegistryVPW's M715 Parts ListGalleriesLinks

Go Back   M715 Zone > General Tech > Modified Tech

Modified Tech Tech forums for Modified M715 series vehicles

Reply
 
Thread Tools Display Modes
  #21  
Old January 28th, 2021, 04:14 PM
Barrman's Avatar
Barrman Barrman is offline
Chief 9-flats

 
Join Date: Dec 2003
Location: Giddings, Texas
Posts: 7,541
Barrman is a Soldier
Default

Thanks Steve. You gave me a topic to search.

I already knew there were at least 4 factory GM glow plugs used over the years with only the newest being the self regulation type. 5G, 9G, 11G and 60G. People have hooked up a 60G to a battery and left them on 8-24 hours without failure, swelling or explosion. I have 60G plugs in all of my engines.

I knew GM had the CUCV glow plug system, the 1982 initial 6.2 system, a 1984 revised system, the 1988-1992 system and then the 1993-2000 system for the OBD II computer run injection pump trucks with a turbo.

What I learned new is that the self regulating 60G glow plugs didn’t come along with the 1988 controller. I am using the 1988 version controller. All of the non 60G glow plugs hit 1400° just about immediately. But, if left powered more than 12 seconds they could actually explode or at least start to swell.

So the 1988 controller does an 8 second glow cycle. The 60G plugs need 12-16 second glow to get to full temperature. My double cycle of just turning the ignition on, waiting for the wait light to go out, turning the ignition off then back on real quick. Gives me 16 total seconds but not at full heat.

I had seen the diesel performance sellers all had their own “glow extender” kits. Basically, an older Ford starter relay wired to a push button switch inside the cab that could be held down to keep the voltage going. I’m sure they work, but I want a system that works for who ever might be needed to drive my truck without special instructions.

Researching “resistor added to 6.5 diesel glow plug controller “ thanks to Steve resulted in 30 years of people complaining about and fixing this problem. A 5 Ohm 1 watt resistor added to terminal C of the controller plug adds 4-5 seconds to every glow period. A 10 Ohm 2 Watt resistor adds 8-10 seconds.

I think I will do the 5 Ohm mod first and see what results I get.

The reasons I am using the 4 pin 1988-1992 controller are several. It doesn’t need access to the coolant system to function. It has a temperature sensor in it that when the outside temperature is over 80° and the engine is warm, it won’t even turn on the glow plugs. It can also be mounted just about anywhere a person wanted. I have mine bolted to the inside rear of the drivers side head. Central to the wiring and out of the way.
__________________
Remember if you didn't build it you can't call it yours.

6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.
Reply With Quote
  #22  
Old February 1st, 2021, 01:29 PM
kwai's Avatar
kwai kwai is offline
Sergeant

 
Join Date: Dec 2006
Location: Houston, Tx
Posts: 2,953
kwai is a Soldier
Default

Quote:
Originally Posted by Barrman View Post
Thanks Steve. You gave me a topic to search.
I have mine bolted to the inside rear of the drivers side head.
Wow! Your suburban has a head in it for the driver. I actually kinda prefer stopping occasionally to stretch my legs though.

Hope the resistor idea works for you.

My F250 has 450,000 miles on it and has been hard to start in cold weather for the last 50,000 miles or so. Changed the glow plugs and controller and diagnostics say they are working, but the long cranking and white smoke says otherwise.
Reply With Quote
  #23  
Old February 1st, 2021, 02:25 PM
Barrman's Avatar
Barrman Barrman is offline
Chief 9-flats

 
Join Date: Dec 2003
Location: Giddings, Texas
Posts: 7,541
Barrman is a Soldier
Default

The resistors should be in my mail box after work today. I hope it works too.

I will actually be driving the Cowdog full of campers a week from Friday to some private land between Rock Springs and Junction on 377. It will be another good test.

I thought your 6.0 had a heater grid instead of glow plugs?
__________________
Remember if you didn't build it you can't call it yours.

6.2 powered M715, 5 M1009's, M416, 2 M101's, 2 M105's, 3 M35's, M1007 6.5 turbo Suburban project called Cowdog.
Reply With Quote
  #24  
Old February 1st, 2021, 04:26 PM
kwai's Avatar
kwai kwai is offline
Sergeant

 
Join Date: Dec 2006
Location: Houston, Tx
Posts: 2,953
kwai is a Soldier
Default

nope. 6.0 has glow plugs.
Reply With Quote
Reply

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 -7. The time now is 07:49 PM.

 

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
1998 - 2021


This site is owned and operated by:
M715 Zone, LLC
President: Jon Schmidt, User ID=brute4c
If you have any suggestions, comments, problems or questions, contact:  brute4c@m715zone.com

Use of this site means you understand and agree to our TERMS OF USE

Copyright Notice:
This web site is subject to the protection of the copyright laws of the United States and other countries. Except for Personal Use Only, you may not modify, copy, distribute, transmit, display, perform, reproduce, publish, license, create derivative works from, transfer, or sell any information obtained from any part of the M715 Zone website without the prior written permission of M715 Zone, LLC.

Written permission can only be obtained by contacting
brute4c@m715zone.com

Copyright 1998-2021