TheDieselPage.com Forums
 
The Diesel Page Forums

2019 - TDP's 23rd Anniversary
What's New | Feature Articles | Product Reviews | Member's Area | Free Forum Registration
Duramax 6600 Diesel Page | Advertiser's Section | Classified Ads | The Diesel Page - Publications


Go Back   TheDieselPage.com Forums > 2001-2019 Chevrolet & GMC 2500HD/3500 Light Trucks > Duramax 6600
Register FAQ Members List Photo Album Mark Forums Read

Duramax 6600 Welcome to the Internet's first Duramax 6600 diesel discussion forum for the LB7, LLY, LBZ, LMM, LML, LGH & L5P RPO code engines. Tips on performance, fuel economy, troubleshooting and more.

Reply
 
Thread Tools Display Modes
  #1  
Old 01-28-2018, 11:45 AM
coxfmly coxfmly is offline
Enthusiast
 
Join Date: Jan 2005
Location: La Mirada, Cal
Posts: 202
Unhappy collapsed upper radiator hose

Hello,
I replaced my thermostats with GM factory units and now its running hot.
I installed the thermostat with the small weep holes in the rear position. The taller unit was forward. pointed ends up with the springs lowered into the housing. Used a previously posted diagram for guidance.

Removed and replaced 3 gallons of Dexcool and filled until fluid came out of seep hole.
After driving around last night it never cooled to 180 reading.
Upper hose didn't pressurize as i would have expected.

Checked this morning and the upper radiator hose has completely collapsed.
Pulled cap and the pressure was released.

I have just read about warming it up and revving past 3k a few times.
Will try that today. Assuming I have air in the system?

Thanks
__________________
04 GMC Sierra, 4x4
94 suburban, 4x4
84 suburban, 6.2 with Banks. Turbo 400 w/4.10's. Ex-Fire truck.
83 Volvo 760 turbo diesel. Yea it's ugly, but it gets 40 mpg on the highway...
Reply With Quote
  #2  
Old 01-28-2018, 12:20 PM
DmaxMaverick's Avatar
DmaxMaverick DmaxMaverick is offline
Administrator
 
Join Date: Apr 2001
Location: CA
Posts: 12,259
Arrow

Sounds like typical air in the system after a service (R/R of coolant). Loosen the cap at least 1/2 turn, warm it up to about operating temp, and run several 20-30 second cycles of WOT (hold the pedal to the floor, it won't hurt anything), followed by a minute or two at idle. Watch the coolant level between cycles, as it should decrease as air is being replaced with coolant. The level should decrease after several seconds to a minute or two after returning to idle. Continue until the coolant level in the tank no longer moves. It may take as many as 2-3 cycles to see any movement, and it wouldn't be uncommon to take 8-10+ cycles to complete (typical is 4-5, the book says 3+). If the coolant level in the tank goes below the hose, you'll have to start all over again. It's better to keep it overfull (above the full line) and pull some out when you're done, than run it empty. It may take a little more coolant over time and a few hundred to thousand miles.
__________________
1985 Blazer 6.2
2001 GMC 2500HD D/A
2014 Chevy Cruze Diesel - Fabulous car, no problems at all, but sold Nov. 2016 @ 55K miles.
dmaxmaverick@thedieselpage.com
Reply With Quote
  #3  
Old 01-28-2018, 02:51 PM
coxfmly coxfmly is offline
Enthusiast
 
Join Date: Jan 2005
Location: La Mirada, Cal
Posts: 202
Smile

Perfect, let go and and give it a whirl.
__________________
04 GMC Sierra, 4x4
94 suburban, 4x4
84 suburban, 6.2 with Banks. Turbo 400 w/4.10's. Ex-Fire truck.
83 Volvo 760 turbo diesel. Yea it's ugly, but it gets 40 mpg on the highway...
Reply With Quote
  #4  
Old 01-28-2018, 07:14 PM
coxfmly coxfmly is offline
Enthusiast
 
Join Date: Jan 2005
Location: La Mirada, Cal
Posts: 202
Question

Well, I tried for over an hour to get the air out...no go.
the temp wouldn't regulate down to 180 area.
I tightened the cap and the system wouldn't pressurize?
Upper hose stays very soft....could it be the radiator cap?

When its sealed up and I squeeze the hose I can hear the water "swishing" and then the fluid in the tank moves. I know the connection but it just sounds like a major amount of air.

i measured the fluid removed and i replaced it almost the the oz. going back in.
I don't believe I'm that far off with the refill.

Even with the temp being higher the fan clutch never "kicks" in.
fan turns but it doesn't lock up.

hmm....
__________________
04 GMC Sierra, 4x4
94 suburban, 4x4
84 suburban, 6.2 with Banks. Turbo 400 w/4.10's. Ex-Fire truck.
83 Volvo 760 turbo diesel. Yea it's ugly, but it gets 40 mpg on the highway...
Reply With Quote
  #5  
Old 01-28-2018, 10:33 PM
rapidoxidationman rapidoxidationman is online now
Enthusiast
 
Join Date: Dec 2002
Location: Teton Valley, Idaho
Posts: 1,743
Default

If I remember correctly, there is an air bleeder port on top of the thermostat housing. Putting the front of the truck higher than the back, however you can do that whether it is with ramps, a bank, just a hill, or whatever, will also help to get the air to where you can bleed it out at the thermostat. I don't think you're going to get much air out of the overflow tank, because the elevations of the plumbing involved won't let it happen.
__________________
'85 Mercedes Benz 300D, for when I want to be stately.
'05 Mercedes E320 CDI, for when I want to be even statelier.
'05 Chevy K2500 ext cab long box DMax: Everything my '03 was and so much more!

There's no point being a pessimist - it wouldn't work anyway.
Reply With Quote
  #6  
Old 01-29-2018, 09:54 AM
Kennedy Kennedy is online now
Long Distance Crew Chief for BMDMAX
 
Join Date: Mar 2000
Location: Loyal WI US
Posts: 10,673
Default

Quote:
Originally Posted by rapidoxidationman View Post
If I remember correctly, there is an air bleeder port on top of the thermostat housing. Putting the front of the truck higher than the back, however you can do that whether it is with ramps, a bank, just a hill, or whatever, will also help to get the air to where you can bleed it out at the thermostat. I don't think you're going to get much air out of the overflow tank, because the elevations of the plumbing involved won't let it happen.
Yep

Open air bleed until liquid comes out. If it does not then add coolant until the level is high enough. Don't be afraid to fill to the protrusion at about an inch above the mid seam. Once liquid comes out start and run the engine and it should bleed just fine. Top off the surge tank as necessary.
__________________
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ

Custom tuning in house using EFI Live tuning software!
Reply With Quote
  #7  
Old 01-30-2018, 05:56 PM
coxfmly coxfmly is offline
Enthusiast
 
Join Date: Jan 2005
Location: La Mirada, Cal
Posts: 202
Thumbs up

Hello,

I was having a bit of trouble with the purge tank optics.
From the side it looked as if it was filled to the proper level but when I looked into the fill port it was at the top of the tank. It was quite odd to see it surge out of the top when from the side it was half full..

Well, It has finally purged itself and is running within specs.
Funny thing is, I drained 3 gallon, refilled with 3 gallons and in the end it required another gallon to top off. Maybe it had air in the system all along.

Thanks for all your help, Paul
__________________
04 GMC Sierra, 4x4
94 suburban, 4x4
84 suburban, 6.2 with Banks. Turbo 400 w/4.10's. Ex-Fire truck.
83 Volvo 760 turbo diesel. Yea it's ugly, but it gets 40 mpg on the highway...
Reply With Quote
  #8  
Old 01-30-2018, 08:40 PM
rapidoxidationman rapidoxidationman is online now
Enthusiast
 
Join Date: Dec 2002
Location: Teton Valley, Idaho
Posts: 1,743
Default

All told, the cooling system capacity is about 24 quarts.
__________________
'85 Mercedes Benz 300D, for when I want to be stately.
'05 Mercedes E320 CDI, for when I want to be even statelier.
'05 Chevy K2500 ext cab long box DMax: Everything my '03 was and so much more!

There's no point being a pessimist - it wouldn't work anyway.
Reply With Quote
  #9  
Old 01-31-2018, 08:36 AM
Kennedy Kennedy is online now
Long Distance Crew Chief for BMDMAX
 
Join Date: Mar 2000
Location: Loyal WI US
Posts: 10,673
Default

Quote:
Originally Posted by coxfmly View Post
Hello,

I was having a bit of trouble with the purge tank optics.
From the side it looked as if it was filled to the proper level but when I looked into the fill port it was at the top of the tank. It was quite odd to see it surge out of the top when from the side it was half full..

Well, It has finally purged itself and is running within specs.
Funny thing is, I drained 3 gallon, refilled with 3 gallons and in the end it required another gallon to top off. Maybe it had air in the system all along.

Thanks for all your help, Paul

The way that the tank is baffled it tends to allow some reserve space for expansion preventing complete fill errors. Often we fill to near the rim as it settles out to right about full once run and completely purged.
__________________
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ

Custom tuning in house using EFI Live tuning software!
Reply With Quote
  #10  
Old 03-20-2018, 08:28 AM
More Power's Avatar
More Power More Power is offline
Administrator
 
Join Date: Feb 2000
Location: Big Sky Country
Posts: 10,479
Arrow

The spring side of the thermostat(s) should point toward the hot side of the cooling system (the engine). If you're concerned about whether the new t-stats are opening at the correct temperature, remove them from the engine and place them in a pan of water, raise the temperature, and using a cooking thermometer, see when the flow valves in each t-stat begin to open.

Back in 2016 when I had my truck's water pump replaced, the tech didn't open the air bleed valve on the t-stat housing. I asked him why. He said it wasn't necessary.... Turns out he was right. He filled the surge tank to the cold fill level, started and drove the truck around the block, then topped off the surge tank when he drove it back into the service bay. I was surprised, but it worked...
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 02:20 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 1996-2019 by TheDieselPage.com - All Rights Reserved