Coolant leak drivers side front of engine. - Chevy and GMC Duramax Diesel Forum
07.5-10 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 07-15-2019, 07:44 PM Thread Starter
 
Join Date: Jul 2019
Posts: 3
Coolant leak drivers side front of engine.

I have a 2009 GMC 2500HD with the LMM engine. I recently developed a coolant leak on the right front of the drivers side. I added dye and it appears the leak is from above the oil cooler tube behind the water pump. Any ideas? It’s a drip-drip-drip leak, hits the skid plate and runs to back and drips to the ground.
Hangingnstl is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 07-17-2019, 07:52 AM Thread Starter
 
Join Date: Jul 2019
Posts: 3
Upon further review with a borescope the leak is running down behind the oil cooler tube and about 2 inches behind where the oil cooler tube connects to the water pump. Its right above where the most forward bolt in the block that holds the radiator shroud. I hate to think its a leaking head gasket, but I'm running out of ideas.
Hangingnstl is offline  
post #3 of 5 (permalink) Old 07-17-2019, 11:42 AM
 
Join Date: Jul 2019
Location: Adams, TN
Posts: 4
There is a block coolant drain plug in that area you can check.


Sent from my iPhone using Tapatalk

2018 L5P

2003 LB7
BIDSDiesel is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 07-17-2019, 12:06 PM Thread Starter
 
Join Date: Jul 2019
Posts: 3
I did see what I thought was a circular block stamp that had coolant dye in it. Does this drain plug have an allen wrench head? Ill try to get a picture tonight.
Hangingnstl is offline  
post #5 of 5 (permalink) Old 07-18-2019, 06:13 PM
 
Join Date: Jul 2019
Location: Adams, TN
Posts: 4
Quote:
Originally Posted by Hangingnstl View Post
I did see what I thought was a circular block stamp that had coolant dye in it. Does this drain plug have an allen wrench head? Ill try to get a picture tonight.


No, if I remember right it should be a 18mm socket that fits it.


Sent from my iPhone using Tapatalk

2018 L5P

2003 LB7
BIDSDiesel is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



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

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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome