Duramax Diesels Forum Truck of the Week
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Old 04-10-2013, 11:32 AM
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Question Stiff upper radiator hose

About a month ago Trey noticed that my truck had a very stiff upper radiator hose. I wasn't too worried about it because the truck has never seen past 210 on the temp gauge, never has coolant leaks, nor does it use up coolant. Now on this hot NC day I decided to give the truck a bit of throttle going around town, does fine. Temp gauge only got to 200. I checked the upper hose, I can't squeeze it at all. What could be causing this, I hope it's not head gaskets, I can't afford it.
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2001 Chevrolet LB7 Duramax

S366, ARP Head Studs, 5" intake, Suncoast Trans, Airdog 165, Trac Bars, 5" Exhaust, Dsp5, 50 coats of wax.

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Old 04-10-2013, 11:51 AM
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have the injectors been replaced recently?
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Old 04-10-2013, 12:13 PM
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In 2011 if I remember correctly
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S366, ARP Head Studs, 5" intake, Suncoast Trans, Airdog 165, Trac Bars, 5" Exhaust, Dsp5, 50 coats of wax.

Special thanks to: ATP Trucks, Suncoast Transmissions, and Mr. Poole
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Old 04-10-2013, 12:26 PM
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if the rad hose is hard AFTER a night of cool down, then you should be worried. after running it hard, then feeling the hose right away, its no surprise the hose would be hard. the system will be under 13-15psi of pressure to keep the boiling point up
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BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

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Old 04-10-2013, 12:27 PM
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I squeeze my radiator hose every chance I get.
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Old 04-10-2013, 01:59 PM
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Its kind of hard even after cool down overnight, but I can squeeze it end to end with both hands. Not as easy as other trucks
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2001 Chevrolet LB7 Duramax

S366, ARP Head Studs, 5" intake, Suncoast Trans, Airdog 165, Trac Bars, 5" Exhaust, Dsp5, 50 coats of wax.

Special thanks to: ATP Trucks, Suncoast Transmissions, and Mr. Poole
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Old 04-10-2013, 02:14 PM
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When my single cab went bananas I couldnt even compress the radiator hose.
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Old 04-10-2013, 02:14 PM
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how much pressure come out the cap after sitting over night?
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Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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Old 04-10-2013, 02:15 PM
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If it's honestly the headgaskets, I'm selling the truck because i don't want to pay that much to fix it.
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2001 Chevrolet LB7 Duramax

S366, ARP Head Studs, 5" intake, Suncoast Trans, Airdog 165, Trac Bars, 5" Exhaust, Dsp5, 50 coats of wax.

Special thanks to: ATP Trucks, Suncoast Transmissions, and Mr. Poole
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Old 04-10-2013, 02:16 PM
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Quote:
Originally Posted by SparkZ03DMAX View Post
If it's honestly the headgaskets, I'm selling the truck because i don't want to pay that much to fix it.
Quote:
Originally Posted by Chevy1925 View Post
how much pressure come out the cap after sitting over night?
..
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Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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Old 04-10-2013, 02:16 PM
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Quote:
Originally Posted by Chevy1925 View Post
how much pressure come out the cap after sitting over night?
Haven't checked, I'll do that tomorrow morning
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2001 Chevrolet LB7 Duramax

S366, ARP Head Studs, 5" intake, Suncoast Trans, Airdog 165, Trac Bars, 5" Exhaust, Dsp5, 50 coats of wax.

Special thanks to: ATP Trucks, Suncoast Transmissions, and Mr. Poole
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Old 04-10-2013, 02:22 PM
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everyone freaks over a "stiff radiator hose" like a kid that just had his first hard on. If your not eatingloosing coolant, have no to very little pressure come out the cap in the mornings, and no other obvious signs, 90% of the time its nothing. old/bad hoses will balloon out and make it seem like bad headgaskets too so if they over 100k old and never been touched, better start looking into them. specially the little ones at the turbo and at the front cover of the motor. those are often missed and will balloon out and start pissing coolant eventually. been there before
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Quote:
Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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Old 04-10-2013, 02:27 PM
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Ok I'll look into it. Yea no smoke, no leaks, doesn't eat coolant. I just don't believe its head gaskets
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2001 Chevrolet LB7 Duramax

S366, ARP Head Studs, 5" intake, Suncoast Trans, Airdog 165, Trac Bars, 5" Exhaust, Dsp5, 50 coats of wax.

Special thanks to: ATP Trucks, Suncoast Transmissions, and Mr. Poole
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Old 04-10-2013, 02:27 PM
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Not to mention, I have stock trans and don't even give nearly as much hell as other people do
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2001 Chevrolet LB7 Duramax

S366, ARP Head Studs, 5" intake, Suncoast Trans, Airdog 165, Trac Bars, 5" Exhaust, Dsp5, 50 coats of wax.

Special thanks to: ATP Trucks, Suncoast Transmissions, and Mr. Poole
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Old 04-10-2013, 02:31 PM
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If there leaking coolant the it will start to overheat. If its not burning a ton of coolant is just keep driving it.

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