TwinTurbo.NET: Nissan 300ZX forum - OEM line is slightly less in diameter than than most generic
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Subject OEM line is slightly less in diameter than than most generic
     
Posted by Gordo 93TT Daytona on December 15, 2011 at 9:41 PM
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In Reply To I was running autozone line and OEM clamps posted by alpha_omega16 on December 15, 2011 at 08:55 PM
     
Message line sold as 5/16" FI hose. Nissan OEM uses 13.5mm bolt clamps, but they are often too small to use on most of the 5/16" aftermarket hose.

Consequently, if you need to buy new clamps, they should be a variation of OEM-style, Mini F, Bolt-style clamps. The are available at AutoZone, etc., in a range of sizes.

I use the 13-15mm size. They tighten down about half way on the bolt length on new 5/16" FI line while leaving enough additional bolt length to further tighten as necessary.

I would avoid using a worm gear clamp. IMO, they chew up the rubber, and often do not provide as secure a fit as the bolt type clamps.

(Be sure to only use FI hose: SAEJ30R9; not standard issue gas line SAEJ30R6.)

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