Question: Coolant temp s - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > 6.5L Diesel Engine
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise

6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Like Tree1Likes

Reply
 
LinkBack Thread Tools
Old 01-04-2019, 11:39 PM   #1 (permalink)
KaineR
Heat Sink
 
KaineR's Avatar
 
Join Date: Feb 2018
Posts: 10
iTrader Score: 0 reviews

Coolant temp s

Is there any way to bypass the coolant temp sensor on my 93 65, at -10*c truck is too cold to crank fast but glow plugs work but if I have the truck plugged in glow plugs wont cycle because it reads the engine temp to warm, ( same on a warm day). Any ideas?

__________________
'93 K2500 Regular Cab Long Box w/NV4500
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-05-2019, 12:16 AM   #2 (permalink)
Moosenuggets
Diesel Student
 
Join Date: Jun 2011
Location: Alaska
Posts: 43
iTrader Score: 0 reviews

Seems odd that block heater will get it that hot. Below 0* owners manual suggests plugging in at least 8 hours. I know mine needs it. It has never gotten too hot to cycle glow plugs... I'm wondering if there is wiring problem on your block heater shorting and causing the glow plugs problem.

__________________
93 GMC K2500
5 Speed Manual
4" Exhaust
Offline   Reply With Quote Quick reply to this message
Old 01-05-2019, 12:19 AM   #3 (permalink)
Moosenuggets
Diesel Student
 
Join Date: Jun 2011
Location: Alaska
Posts: 43
iTrader Score: 0 reviews

Just noticed C, (14* F) owners manual recommends 2 hours at that temp.
__________________
93 GMC K2500
5 Speed Manual
4" Exhaust
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-05-2019, 12:30 AM   #4 (permalink)
Ron Nielson
Diesel Pro
 
Ron Nielson's Avatar
 
Join Date: Aug 2009
Location: Berryton, KS
Posts: 2,360
iTrader Score: 0 reviews

If you are plugging in your block heater, and the temp sensor is on the same side as the heater, there is a fix. Relocate the temp sensor to other side of the block. Let me know if this might be your problem and I'll see if I can find the publication to tell yo what steps to follow.
__________________
Ron Nielson

2008 2500HD LT CCLB/Ally. Line-X, B&W Companion, MaxLoader Springs, Edge Insight CTS, Kennedy Custom ECM
2009 Arctic Fox 5er, Silver Fox Edition 29-5T, 3.6 Onan LPG, SteadyFast Stabilizers
Offline   Reply With Quote Quick reply to this message
Old 01-05-2019, 12:42 AM   #5 (permalink)
KaineR
Heat Sink
 
KaineR's Avatar
 
Join Date: Feb 2018
Posts: 10
iTrader Score: 0 reviews

It happens in the summer to, but not as big as a deal air temp lets me get it started without much effort, I dont think its a sensor problem as my dash reads properly could the glow plug controller be the cause?


Sent from my iPhone using Tapatalk
__________________
'93 K2500 Regular Cab Long Box w/NV4500
Offline   Reply With Quote Quick reply to this message
Old 01-05-2019, 03:32 AM   #6 (permalink)
ak diesel drive
Diesel Nut
 
Join Date: Apr 2009
Posts: 822
iTrader Score: 0 reviews

Sounds to me like you need to check out the temp sensors that control the glow plug controller. There's 2 IIRC but I don't recall if they control the advance and glow contol seperately or in combo with each other
__________________
96 k2500 214000 miles GL4, turbomaster, 4" exhaust, vac pump delete, marine injectors, -1.94 TDCO
Offline   Reply With Quote Quick reply to this message
Old 01-05-2019, 04:04 AM   #7 (permalink)
KaineR
Heat Sink
 
KaineR's Avatar
 
Join Date: Feb 2018
Posts: 10
iTrader Score: 0 reviews

Is there an advance on a full mechanical 6.5?


Sent from my iPhone using Tapatalk
__________________
'93 K2500 Regular Cab Long Box w/NV4500
Offline   Reply With Quote Quick reply to this message
Old 01-05-2019, 07:08 AM   #8 (permalink)
sctrailrider
Diesel Expert
 
sctrailrider's Avatar
 
Join Date: Dec 2010
Location: SC
Posts: 2,525
iTrader Score: 0 reviews

Old School Oil Burners (Old SOBs) Member

Yes their is, the sensor on the front DS head is for the dash only..


The sensor on the rear PS is for the fast idle & advance & glows...
__________________
1993 K3500

owner Twisted Steel Performance
Head Porting, Ceramic coating

like us on Facebook




Online   Reply With Quote Quick reply to this message
Old 01-05-2019, 09:43 AM   #9 (permalink)
56pan
Diesel Head
 
Join Date: Nov 2014
Location: North Carolina
Posts: 565
iTrader Score: 0 reviews

Quote:
Originally Posted by sctrailrider View Post
Yes their is, the sensor on the front DS head is for the dash only..


The sensor on the rear PS is for the fast idle & advance & glows...
My truck is a '93 and that's correct about the sensors. I can always tell if the sensor for glow/advance is working after a cold start. At least on my engine, when the inj. pump timing is advanced the eng. has a louder rattle. About a mile down the road, I can hear the advance shift out and the loud rattle stops. Happens every time and very noticeable. You might try listening for this after a cold start. Found this chart in alldatadiy for my truck for eng. coolant temp. sensors:

ENGINE COOLANT TEMPERATURE (ECT) SENSOR


212F or (100C) 177 Ohms

158F or (70C) 467 Ohms

100F or (38C) 1800 Ohms

68F or (20C) 3520 Ohms

40F or (4C) 7500 Ohms

20F or (-7C) 13,500 Ohms

0F or (-18C) 25,000 Ohms

-40F or (-40C) 100,700 Ohms

Couldn't find a chart specifically for the diesel advance/glow/fast idle sensor on a '93 but this should be close. Hope this helps.
__________________
'93 C2500 280,000 m.
60k on new AMG mil. surplus engine
Turbo with name that starts with A.
Straight pipe exh. (but it ain't that loud).
Peninsular intercooler
Boost, EGT, Glowshift intercooler in/out temp. 3 guage pod.
Rebuilt complete susp. with polyurethane bushings. (Bad idea).
20k on GM 4L80E rebuilt trans.
Dual thermostat/Duramax fan/high flow water pump.
Offline   Reply With Quote Quick reply to this message
Old 01-09-2019, 08:55 PM   #10 (permalink)
lukeenterprises
Block Heater
 
Join Date: Apr 2009
Posts: 15
iTrader Score: 0 reviews

The coolant temp sensor for the glow plugs is on or off. On my 95 skoolie, it is 100 degrees F. The sensor is on the passenger, rear right against the exhaust. Mine kept going bad. I bought some fiberglass fuel line insulation and wrapped the next one that I put in. I never had any problems with that again.

Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
LML: 2011 LML thermostats bad? theZman Duramax Fifth Generation: 2011-2016 (LML) 22 03-17-2019 09:26 PM
thermostats excessive fuel usage and coolant temp low for regen faults chevy1946 Duramax Fifth Generation: 2011-2016 (LML) 3 10-31-2018 06:43 PM
Heating issues bradaet Duramax First Generation: 2001-2004 (LB7) 3 09-26-2018 09:55 AM
Question: Coolant temp question, little smoke on startup question cptsnoopy 6.5L Diesel Engine 19 08-11-2018 09:28 PM
Duramax thermostats dk24291 Duramax Third Generation: 2006-2007.5 (LBZ & LLY) 18 03-06-2018 08:04 PM


All times are GMT -4. The time now is 08:34 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide