Hardlines running along passenger frame rail - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

GripSpec · 11-27-2016, 06:00 PM

I started a winter tear down on my s13, and found a bend in one of the metal hardlines on inner passenger frame rail. Tracing it up towards the firewall, I find that the hardline leads to rubber line that leads to.... nothing?

Are these fuel lines? If so, is this line not used in after swapping to an SR (hard to imagine that could be the case)? I always thought they were brake lines, but never thought much about it (other than checking for rust). I swapped and SR into this car 5+ years ago and it has been through multiple auto-x seasons since then. I had a friend helping with the swap at the time so I'm thinking that is when this line might have been removed/disconnected.

Here is a stock photo of the lines (four lines next to frame rail). The line in question is the inner most line closest to trans.

Here is a shot of my lines from the top in the engine bay (between passenger side strut tower and intake manifold)

zombiewolf513 · 11-27-2016, 06:53 PM

For future reference, there's an 'identify this' thread:
http://zilvia.net/f/showthread.php?t=174916

Pretty sure that cut line is for the vent or egr system's charcoal canister. Been a minute.

KAT-PWR · 11-27-2016, 06:57 PM

Fuel tank vent

GripSpec · 11-27-2016, 07:27 PM

Apologies for not using the thread mentioned above. Thanks for the replies.

Are all 4 lines fuel related, or are they a mix of fuel/brakes?

Sent from my iPhone using Tapatalk Pro

derass · 11-27-2016, 11:03 PM

Those 4 lines are: Fuel Supply, Fuel Return, Rear Brake Circuit and EVAP.

As mentioned above, the disconnected line on your car is EVAP. Can't remember exactly how it makes it's way over there, but I do remember that it eventally runs along the top of the driver's side frame rail where it's finally connected to the Charcoal Canister, which is attached to the radiator support, also on the driver's side.

Here's the best pic I could find. This is an S14 but S13 is identical. The line connected to the top of the canister is the one of the four that runs under the car to the fuel tank.

MR_GUTTI · 11-27-2016, 11:06 PM

Fuel to filter, fuel return to tank, tank vent and rear brake.

11-27-2016, 06:00 PM	#1
GripSpec Leaky Injector Join Date: Dec 2007 Location: Richmond, VA Age: 34 Posts: 93 Trader Rating: (5) Feedback Score: 5 reviews	Hardlines running along passenger frame rail I started a winter tear down on my s13, and found a bend in one of the metal hardlines on inner passenger frame rail. Tracing it up towards the firewall, I find that the hardline leads to rubber line that leads to.... nothing? Are these fuel lines? If so, is this line not used in after swapping to an SR (hard to imagine that could be the case)? I always thought they were brake lines, but never thought much about it (other than checking for rust). I swapped and SR into this car 5+ years ago and it has been through multiple auto-x seasons since then. I had a friend helping with the swap at the time so I'm thinking that is when this line might have been removed/disconnected. Here is a stock photo of the lines (four lines next to frame rail). The line in question is the inner most line closest to trans. Here is a shot of my lines from the top in the engine bay (between passenger side strut tower and intake manifold)

11-27-2016, 06:57 PM	#3
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	Fuel tank vent __________________ MRP Manufacturing

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11-27-2016, 06:53 PM	#2
zombiewolf513 BANNED Join Date: Mar 2011 Location: AZ Age: 33 Posts: 1,682 Trader Rating: (6) Rides Gallery: zombiewolf513 Feedback Score: 6 reviews	For future reference, there's an 'identify this' thread: http://zilvia.net/f/showthread.php?t=174916 Pretty sure that cut line is for the vent or egr system's charcoal canister. Been a minute.

11-27-2016, 07:27 PM	#4
GripSpec Leaky Injector Join Date: Dec 2007 Location: Richmond, VA Age: 34 Posts: 93 Trader Rating: (5) Feedback Score: 5 reviews	Apologies for not using the thread mentioned above. Thanks for the replies. Are all 4 lines fuel related, or are they a mix of fuel/brakes? Sent from my iPhone using Tapatalk Pro

11-27-2016, 11:03 PM	#5
derass Zilvia FREAK! Join Date: Jun 2010 Location: Toronto, ON Age: 33 Posts: 1,182 Trader Rating: (0) Feedback Score: 0 reviews	Those 4 lines are: Fuel Supply, Fuel Return, Rear Brake Circuit and EVAP. As mentioned above, the disconnected line on your car is EVAP. Can't remember exactly how it makes it's way over there, but I do remember that it eventally runs along the top of the driver's side frame rail where it's finally connected to the Charcoal Canister, which is attached to the radiator support, also on the driver's side. Here's the best pic I could find. This is an S14 but S13 is identical. The line connected to the top of the canister is the one of the four that runs under the car to the fuel tank.

11-27-2016, 11:06 PM	#6
MR_GUTTI Zilvia Junkie Join Date: Nov 2009 Location: Houston Posts: 324 Trader Rating: (9) Feedback Score: 9 reviews	Fuel to filter, fuel return to tank, tank vent and rear brake.