Duramax Diesels Forum Truck of the Week
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Old 10-20-2018, 08:08 PM
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Default My hydroboost power steering line repair

As many of you know, GM power steering lines, especially the ones to the hydroboost tend to leak. Wether they be OEM, aftermarket or otherwise.

I decided to take a different route this time. I replaced the line with a genuine hydraulic hose. That way if it ever does leak again, which is less likely, I can replace it for less than $20

First I had to cut off the rubber line and crimps
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2008 Chevrolet 3500HD DRW LTZ
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2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm

Last edited by 2004LB7; 10-20-2018 at 08:20 PM.
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Old 10-20-2018, 08:10 PM
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Then I cut off some of the tubing so it was flish with the ribbing. Cleaned up the cut and ground the ribbs down so they would fit inside the new flare fittings
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2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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Old 10-20-2018, 08:13 PM
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Then I brazed up the fittings and attached them to the new hydraulic hose
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2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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Old 10-20-2018, 08:14 PM
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Installed in the truck. Make sure it doesn't rub on anything and clears the boost tube
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2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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Old 10-20-2018, 08:18 PM
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Parts purchased from McMaster Carr

Hydraulic Hose 9459K241 $18.61
Flared Fitting 50695K173 $1.95 x2

Just finished putting it in and tested for leaks. So far looks good
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2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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Old 10-21-2018, 03:48 PM
gmc502 gmc502 is offline
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very nice,if and when mine start to leakI'm gonna go w/ #6 hydraulic line and reusable hose connections.they screw together rather than a crimp.
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new style gm exhaust manifold, banks big head wastegate, PPE boost valve, banks air intake,high idle switch in cruise control, stock but not for long
EFI live tuned byMe now,dps5 switch,EGT probe and autometer boost sensor,SoCal 6spd conversion
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Old 10-21-2018, 04:43 PM
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I thought about the screw on connectors but wasn't sure if I could trust them. Being that this line is part of the brake boosting circuit that runs upwards of 1600 psi, I figured a premade line would be best.
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2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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Old 10-21-2018, 05:05 PM
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Very nice repair job.

As an alternative to the fittings brazed on they do make pressure fittings that crimp themself onto tubing when you tighten them. I have fittings to convert all my steel hardlines to AN on my return side but they were rated for a few hundred psi so I bet they would be fine on a steering system.
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Old 10-21-2018, 05:10 PM
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Quote:
Originally Posted by OregonDMAX View Post
Very nice repair job.

As an alternative to the fittings brazed on they do make pressure fittings that crimp themself onto tubing when you tighten them. I have fittings to convert all my steel hardlines to AN on my return side but they were rated for a few hundred psi so I bet they would be fine on a steering system.


This is what many do with the trans cooler lines. I have hose that is leaking a bit on my LB7 and I think this is how I will fix it if it doesn’t sell before I get to it. I believe they are 1/2” OD.
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Old 10-21-2018, 05:37 PM
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Are you referring to swagelok fittings? That would work but too expensive for me.

One could also flare the ends and put flare couplings on and then a hydraulic hose
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2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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Old 10-21-2018, 09:28 PM
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No but these are similar. Their just a regular steel fitting not stainless. Wherever the leaky trans cooler hoses threads are from like 5-8 years ago is where one can find them.
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Old 10-22-2018, 05:28 AM
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Quote:
Originally Posted by 2004LB7 View Post
I thought about the screw on connectors but wasn't sure if I could trust them. Being that this line is part of the brake boosting circuit that runs upwards of 1600 psi, I figured a premade line would be best.
used them on my external steering on my boat,2800psi.been like that for 16yrs.
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2002 GMC 2500HD, ECSB, 4WD, LB7,300k miles and still truckin
new style gm exhaust manifold, banks big head wastegate, PPE boost valve, banks air intake,high idle switch in cruise control, stock but not for long
EFI live tuned byMe now,dps5 switch,EGT probe and autometer boost sensor,SoCal 6spd conversion
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Old 10-22-2018, 07:53 AM
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Quote:
Originally Posted by gmc502 View Post
used them on my external steering on my boat,2800psi.been like that for 16yrs.
Thats good to know. I have little experience with them, only having made a few. And never got to see them run long term
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285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
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