diesel tolerant tube 6mm to 8mm fit

rick_d

 
 
 
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I have an issue. nozzle return (leakage) off of pump is 6mm, return line on firewall is 8mm. obviously, 5/16" (essen 8mm, ID shown as 7.8mm) rubber tubing will not clamp down on the pump spud. is electical shrink tubing diesel tolerant? other ideas..
 

beanz2

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Push an 8mm line past the ferrule closer to the pump, it gets to be 8mm there.

Dave
 
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I would persue figuring out a way to get the rubber to clamp down using 6mm rubber hose (1/4"). Even if heat shrink wrap worked it'd still be hoaky IMO. I had this same issue recently, the return is (obviously) not a high pressure system. Rubber line and carquest around here sells brass adapters from 1/4" to 5/16" that would probably work great...
 
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rick_d

 
 
 
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dave-

spud is 6mm from banjo fitting out.

andre-

the adapter might be the ticket, I just wanted to have reduced numbers of clamps inline on the system.

no way, no how will the 6mm line stretch enough for the 8mm firewall return
 

beanz2

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rick_d said:
dave-

spud is 6mm from banjo fitting out.
Rick, the most factory solution is to retrofit an older fuel return line with an 8mm post ferrule return line. Here is a pic of RoscoHZJ73's fuel pump that has what I was talking about:



BTW, the idler shafts measured 37.90 mm (Don Kyatt) and 37.94 mm (factory)

Dave
 

rick_d

 
 
 
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only problem with that spud is it's not altitude compensated and the banjo installs in the horizontal plane. hd-t pumps and alt. comp. pumps install in with the banjo in the vertical plane.

i have the modern (aka ens version) nozzle leakage pipe and it don't fit the 5/16 id rubber.
 

beanz2

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Look if an older version of the 1HDT return line has the same 8mm to 6 mm configuration. I can check later when I get home. At worst, take the older 1HZ line and mount it in the vertical plane. Is the mounting indexed in anyway?

Dave
 

rick_d

 
 
 
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80 series data:
1/90-6/92 hd-t takes 23762-17020 which subs to 17021

same for same period hz.

6/92-1/95 hd-t and alt comp hz is 17021 that subs to 17050.

1/95+ hd-ft and alt comp hz take 17050

70 series (2004 parts book)
hz all sub to 17050 then to 17051 (all) with alt comp pumps.

70 series hd-fte takes 17060, which appears to be a horizontal orientation.

I assumed, later model, bigger better system. maybe better, but certainly not bigger.
 
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