|04.5-05 LLY 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 Ect|
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|12-29-2009, 05:16 PM||eBay Motors #1 (permalink)|
Hydro Boost leak?
My hydro boost is leaking. Not terrible, but its leaking. It's leaking where the aluminum body that holds the fluid resivoir and black body mate up. Dont know what it's called i'll post a pic. Haven't tried tightening the two bolts yet! Is there just a gasket i can change or do i have to change the whole thing? Any special instructions? I've never messed w/ this before. Do I have to bleed brakes?
|12-30-2009, 04:29 PM||eBay Motors #2 (permalink)|
|12-31-2009, 05:33 AM||eBay Motors #3 (permalink)|
Join Date: May 2009
Location: Bucks County, PA
Not sure how/if theirs a gasket but get on that fairly quick...if that bad boy goes so do your brakes...which I'm sure you already know. Just being the worried momma
2005 Chevy 3500 4x4 DRW CC/Alli...LBZ MP, PCV ReRoute, Hacked-Up Airbox (Thanks KennedyDiesel for the Freebie!) PPE Standard, EGR Blocked, 4" MBRP Turbo Back exhaust, AutoMeter Boost & EGT Gauges, Cognito Brace, Bilstein 5100's
1969 Dodge SuperBee 500 cu in ('tis fun)
1965 Plymouth Max Wedge (9.35 1/4 miler
Project: 70' 440-6BBL 'Cuda (real deal....about 2 years out)
99' Mustang GT- All built, Dynoed 514 RWHP at 13 lbs Boost
|12-31-2009, 05:50 AM||eBay Motors #4 (permalink)|
Join Date: Sep 2008
Location: Beer Tent Capital of the World
I do not think you can easily just replace a gasket. Usually if they are leaking there it is time to replace the unit.
2003 Chevy 2500hd crew cab 4x4, D/A
Just a few aftermarket goodies
|12-31-2009, 06:03 AM||eBay Motors #5 (permalink)|
LHN...We ARE the Joneses
Join Date: May 2008
Location: Awww-stin, TX
Remove the nuts on the two studs, and push the Master Cylinder forward to clear the studs. There’s enough flex in the tubing to do so. Remove the high-pressure lines (with fittings) on the HB unit, along with the low-pressure return line (hose clamp). This line will be stuck, just twist left and right to break the seal and remove. Use caution when pulling that line off, you’re wrist will inevitably strike the metal support on the firewall and slice you open.
On the inside, remove the keeper for the push rod attached to the brake pedal. Remove the four nuts from the studs and pull the unit out from the engine side. Installation is reverse and the unit is self-priming. However, you should flush the system to start anew and add this to your regular maintenance schedule to prolong the life of the system components.
Power Steering/Hydro-Boost Flush
Chances are, had this been done on a regular basis, you wouldn't be out $300 for the repair. The fluid is easily torched and loses viscosity, wearing the piston and causing the seals to eventually leak.
The GM part number is 15854059, available from gmpartsdirect.com
GM PART # 15854059
PACK QTY: 1
CORE CHARGE: $0.00
GM LIST: $543.74
OUR PRICE: $282.85
2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air
Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab
I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"
Last edited by Hook'em_Horns!; 12-31-2009 at 06:09 AM.
|12-31-2009, 06:13 AM||eBay Motors #6 (permalink)|
Join Date: Jun 2008
Location: So. Cal
If it is leaking oily fluid, it is the Hydro unit. However, if it is leaking brake fluid, it will be the seals in the mastercylinder.
It is best to replace these with new parts and not trying to rebuild, or install a used unit.
You can tell the difference-- place a little on your finger and try to wash it off with water only- brake fluid will wash off- Hydro fluid will not, without soap.
Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets.--- Jerry
|02-08-2013, 06:10 AM||eBay Motors #9 (permalink)|
Join Date: Jul 2012
Location: WACO, TX
What about using aftermarket hb unit? Cardon and Wagner both make replacement units that can be had for less. How are these units conpared to factory replacement?
92 3500 DRW single cab, NV4500, 3.73, 190,000 on truck, 15,000 on rebuild. Diamond Eye 3" to 4" straight pipe.
02 2500HD Allison CC LWB 4x4 171,000
Just installed its 3rd set of injectors, efi live with dsp5 switch, much more to be done...
09 Silverado CC gasser 132,000