Duramax Diesels Forum Truck of the Week
  #31  
Old 01-27-2009, 09:00 AM
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Originally Posted by TNRGreene View Post
That's a race valve in there also. How many shims should I use? What is the difference between an LB7 & LLY valve. I have 1 of each & I don't know how to tell tem apart
I dont think you shim a race valve, its either you install a race valve or shim the stocker
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  #32  
Old 01-27-2009, 09:00 AM
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How about this, plug the line, bottle hooked to the other side. Start truck & unplug CP3, fuel in bottle & a leak in the original line also
leak in a hard line too
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  #33  
Old 01-27-2009, 10:32 AM
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Originally Posted by TNRGreene View Post
How about this, plug the line, bottle hooked to the other side. Start truck & unplug CP3, fuel in bottle & a leak in the original line also
I'm confused... Does this mean you had the bottle hooked to the nipple on the rail, and had fuel coming from both the FRPV and the other return line? I think fuel coming from the hose that gets unplugged from the rail for the test is normal, as that's a return to the tank which is shared by the "normal" return for the extra fuel.
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  #34  
Old 01-27-2009, 10:36 AM
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Quote:
Originally Posted by LarryJewell View Post
leak in a hard line too
just the short hose Larry that connects the 2

Quote:
Originally Posted by Cougar281 View Post
I'm confused... Does this mean you had the bottle hooked to the nipple on the rail, and had fuel coming from both the FRPV and the other return line? I think fuel coming from the hose that gets unplugged from the rail for the test is normal, as that's a return to the tank which is shared by the "normal" return for the extra fuel.
it is normal,But the hose is leaking and thats not normal
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  #35  
Old 01-27-2009, 10:53 AM
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Yes what Simon said
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  #36  
Old 02-16-2010, 02:37 PM
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ttt
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  #37  
Old 06-03-2010, 01:30 PM
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Am i not seeing this or does the Lb7 not have a rubber hose like that, seems as though the end of the rail is connected to something with a hard line, not rubber hose.
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  #38  
Old 06-03-2010, 02:25 PM
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Lb7 have a junction block on the ds of the y bridge in that junction block is where the relief valve is..... Follow that line off the back of the rail and u will see the juntion

if you do a seach you should see some pics
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  #39  
Old 07-05-2010, 07:23 PM
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what this one
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  #40  
Old 07-05-2010, 07:44 PM
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what this one
Pardon
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  #41  
Old 05-18-2012, 11:13 AM
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Great info. Going to try this test this weekend. Thanks
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  #42  
Old 06-15-2012, 05:12 AM
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Default Whats the difference

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Originally Posted by tmm403 View Post
Great info. Going to try this test this weekend. Thanks
Whats the difference in using a race valve or just shiming it? is it okay to run a race valve on the street for a dd?
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  #43  
Old 06-21-2012, 03:11 AM
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Originally Posted by surpriseduramax View Post
Whats the difference in using a race valve or just shiming it? is it okay to run a race valve on the street for a dd?

Shims are cheaper......yes its safe IMO

personally i would shim before running a race valve JMHO
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  #44  
Old 06-21-2012, 05:09 AM
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Quote:
Originally Posted by sweetdiesel View Post
Shims are cheaper......yes its safe IMO

personally i would shim before running a race valve JMHO
do you know what is the difference is?
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  #45  
Old 06-21-2012, 07:19 AM
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Shimming the FPRV will still allow the high fuel pressure to bleed off, if the fuel pressure should spike.

The "Race Valve" is just a plug and will not bleed off high pressure if the pressure should spike. I don't think it should be run on the street- [My Opinion]
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