replacing leaking fuel hose and find this... - 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 Tree2Likes

Reply
 
LinkBack Thread Tools
Old 03-08-2016, 10:47 AM   #1 (permalink)
vstech
Moderator
Eco-Logistical
 
vstech's Avatar
 
Join Date: Jul 2008
Location: My Holly, NC
Posts: 4,201
iTrader Score: 0 reviews
Send a message via AIM to vstech Send a message via Skype™ to vstech

Old School Oil Burners (Old SOBs) Member

DieselPlace.com Lifetime Premium Member

replacing leaking fuel hose and find this...

ok. the truck was PISSING fuel... entire undercarriage is coated all the way to the drums... (ya think there might be an issue?)

anyway mechanic calls me to work on it, because he don't do diesel... and I pull the hoses, and FFM and low and behold I find this...

Attached Images
File Type: jpg 20160306_150626.jpg (53.7 KB, 17 views)
__________________
6.5block in 6.2 trim with a TH400 attached
95 6.5 block, most of the IP, flywheel, and pressure plate.
95 Chevy Suburban 1500 "blue bomber"
2000 Chevrolet extended cab long bed 2500 6.5L HO
94 GMC extended cab long bed 6 lug truck 6.5L
Z71 ext cab standard bed S vin with a blown headgasket.
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-08-2016, 10:48 AM   #2 (permalink)
vstech
Moderator
Eco-Logistical
 
vstech's Avatar
 
Join Date: Jul 2008
Location: My Holly, NC
Posts: 4,201
iTrader Score: 0 reviews
Send a message via AIM to vstech Send a message via Skype™ to vstech

Old School Oil Burners (Old SOBs) Member

DieselPlace.com Lifetime Premium Member

only the hoses were leaking, once I installed fresh hoses, there was no fuel leaking under pressure.

I'm guessing this is the fuel heater, and those exposed wires are a bad thing...

__________________
6.5block in 6.2 trim with a TH400 attached
95 6.5 block, most of the IP, flywheel, and pressure plate.
95 Chevy Suburban 1500 "blue bomber"
2000 Chevrolet extended cab long bed 2500 6.5L HO
94 GMC extended cab long bed 6 lug truck 6.5L
Z71 ext cab standard bed S vin with a blown headgasket.
Offline   Reply With Quote Quick reply to this message
Old 03-08-2016, 11:12 AM   #3 (permalink)
HeavyChevy95
Diesel Veteran
 
HeavyChevy95's Avatar
 
Join Date: Jun 2008
Posts: 5,266
iTrader Score: 0 reviews

Correct... Faulty fuel heater and/or short circuits are known to disable glowplug and fuel (lift) pump systems in the process.

Unplug the defective fuel heater until you can afford to replace it.

For a few dollars more.. Often much easier to R&R the entire FFM housing for what it cost to R&R the fuel heater alone.. IIRC, recently saw complete 'drop in' ACDelco units posted for $120.00 or there abouts.
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-08-2016, 11:13 AM   #4 (permalink)
JMJNet
Diesel Legend
 
JMJNet's Avatar
 
Join Date: Feb 2006
Location: Richardson, TX
Posts: 17,245
iTrader Score: 0 reviews

The Suburban Club Member

You can put heatshrink on the wires if there is no hole where the wires came out.

When I replaced the whole FFM, I put a wire loom on all the wires.
It looks more exposed than what I want to so hopefully the looms help with reducing the chance of melting wires.

I also put a dab of RTV where the wires come out just for prevention and protect that holes.
__________________
1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Heath Turbo-Master
AD244 Alternator
Offline   Reply With Quote Quick reply to this message
Old 03-08-2016, 11:32 AM   #5 (permalink)
vstech
Moderator
Eco-Logistical
 
vstech's Avatar
 
Join Date: Jul 2008
Location: My Holly, NC
Posts: 4,201
iTrader Score: 0 reviews
Send a message via AIM to vstech Send a message via Skype™ to vstech

Old School Oil Burners (Old SOBs) Member

DieselPlace.com Lifetime Premium Member

I was thinking of squirting in some liquid electrical tape as a stopgap measure if the owner doesn't want to replace the FFM... it looks new to me. very clean and no corrosion on it, unlike the entire rest of the truck...
__________________
6.5block in 6.2 trim with a TH400 attached
95 6.5 block, most of the IP, flywheel, and pressure plate.
95 Chevy Suburban 1500 "blue bomber"
2000 Chevrolet extended cab long bed 2500 6.5L HO
94 GMC extended cab long bed 6 lug truck 6.5L
Z71 ext cab standard bed S vin with a blown headgasket.
Offline   Reply With Quote Quick reply to this message
Old 03-08-2016, 12:02 PM   #6 (permalink)
JMJNet
Diesel Legend
 
JMJNet's Avatar
 
Join Date: Feb 2006
Location: Richardson, TX
Posts: 17,245
iTrader Score: 0 reviews

The Suburban Club Member

Make sure the liquid tape can withstand the temp.

I will still put some other protection in addition to the liquid tape.

I take it this is not your truck, though.
__________________
1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Heath Turbo-Master
AD244 Alternator
Offline   Reply With Quote Quick reply to this message
Old 03-08-2016, 12:27 PM   #7 (permalink)
HeavyChevy95
Diesel Veteran
 
HeavyChevy95's Avatar
 
Join Date: Jun 2008
Posts: 5,266
iTrader Score: 0 reviews

That fuel heater appears to be constructed like a new one. OEM units often had a metal base with a rubber gromet protecting the wires where they exited the housing.. could of been replaced recently.

If the fuel heater is leaking fuel from the area where the electrical wires exit the heater body, its not just a malfunction, its actually busted (cracked somewhere) and should be replaced asap to avoid further driveability complaints stemming from potential fuel/air leaks.

Last edited by HeavyChevy95; 03-08-2016 at 12:28 PM.
Offline   Reply With Quote Quick reply to this message
Old 03-08-2016, 01:20 PM   #8 (permalink)
JMJNet
Diesel Legend
 
JMJNet's Avatar
 
Join Date: Feb 2006
Location: Richardson, TX
Posts: 17,245
iTrader Score: 0 reviews

The Suburban Club Member

I agree, my replacement looks like this as opposed to the old one.

That is why I put a whole bunch of reinforcement in earlier post.
My FFM is also raised to reduce the heat from the engine valley.
__________________
1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Heath Turbo-Master
AD244 Alternator

Last edited by vstech; 03-08-2016 at 01:50 PM.
Offline   Reply With Quote Quick reply to this message
Old 03-08-2016, 01:46 PM   #9 (permalink)
vstech
Moderator
Eco-Logistical
 
vstech's Avatar
 
Join Date: Jul 2008
Location: My Holly, NC
Posts: 4,201
iTrader Score: 0 reviews
Send a message via AIM to vstech Send a message via Skype™ to vstech

Old School Oil Burners (Old SOBs) Member

DieselPlace.com Lifetime Premium Member

yeah, this one looks nothing like my spares or other truck's ffm's...

like I said, it's NOT leaking at all, and the aluminum body is TOTALLY clean. zero corrosion. I'm going to suggest replacement, but expect him to reject it as it's just been replaced I bet. if the liquid tape isn't heat capable, I'll see about RTV or cut the wires, and install heat shrink on the uncovered wiring.
__________________
6.5block in 6.2 trim with a TH400 attached
95 6.5 block, most of the IP, flywheel, and pressure plate.
95 Chevy Suburban 1500 "blue bomber"
2000 Chevrolet extended cab long bed 2500 6.5L HO
94 GMC extended cab long bed 6 lug truck 6.5L
Z71 ext cab standard bed S vin with a blown headgasket.
Offline   Reply With Quote Quick reply to this message
Old 03-08-2016, 01:52 PM   #10 (permalink)
JMJNet
Diesel Legend
 
JMJNet's Avatar
 
Join Date: Feb 2006
Location: Richardson, TX
Posts: 17,245
iTrader Score: 0 reviews

The Suburban Club Member

I got the feeling that those wires were rubbing into hot metal parts.

__________________
1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Heath Turbo-Master
AD244 Alternator
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
PLEASE HELP NCchevy 6.2L Diesel Engine 114 03-09-2016 02:43 PM
95 6.5 k2500 rescue/build. GA_BOY91 6.5L Diesel Engine 4 10-02-2015 07:33 PM
Serging/hesitation Brock 7654 6.5L Diesel Engine 38 09-24-2015 05:45 PM
Info: The 6.5L FAQ's... The Master List of Information and 6.5 Answers knkreb 6.5L Diesel Engine 16 07-15-2015 12:42 PM
The 6.2L FAQ's... The Master List of Information and 6.2 Answers High Sierra 2500 6.2L Diesel Engine 7 03-01-2015 12:00 PM


All times are GMT -4. The time now is 10:56 AM.


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