JLPurcell

Size? Fuel Line Replacement

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    I am planning to replace all of the fuel lines with cloth wrapped hose. I just measured and it looks like two sizes one for all of the supply side and another size for all of the return lines. I get 5 and 7.62 mm ID does any one know these sizes for sure? Thanks in advance. Jerry 

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    I am planning to replace all of the fuel lines with cloth wrapped hose. I just measured and it looks like two sizes one for all of the supply side and another size for all of the return lines. I get 5 and 7.62 mm ID does any one know these sizes for sure? Thanks in advance. Jerry 


    5/16? That's what I used. I was going to order cloth fuel line for a VW bug, they have metric lines in the sizes we need, but this student budget is really killing that plan... :(

    http://woodworkerb.com/home/datsun-240z-rebuild/240z-fuel-tank/
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    I have a NOS set of Vent hoses on the way for the fuel tank and just ordered 4.5mm & 7.5mm cloth wrapped fuel line for replacement of all of the other fuel lines. I have a complete set of re-plated original hose clamps to finish this project off. ;)

    Ordered cloth wrapped fuel hose from PartsKlassik. 

     

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    You guys are using cloth wrapped to keep the original look? 

     

    I'm not a rich guy I use standard fuel hoses against my free will. default_sad.png

     

     

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    1 hour ago, heyitsrama said:

     

    I'm not a rich guy I use standard fuel hoses against my free will. default_sad.png

     

     

    Yes, the original look when someone looks under the car or opens the hood, to some of us purist, is gratifying.:wub: The total cost of the original style hose was under $50.00 shipped. I have spent much more for much less when it comes to my car projects.<_<  Just to clarify, that is for the fuel hose not the NOS pre-formed vent hoses. Those were the proverbial "arm and a leg".:blink:

    Edited by JLPurcell
    clarification

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    Jerry, are the fuel hoses you have ordered wrapped with braided cloth? Or are they more like this picture (fuel rail to front carb)?

    Some of the fuel hoses on my series 1 car look like the one in this pictured here , when you look close they have a cloth wrapped (not braided) texture that seams to be rubberized as well.  They don't have the glossy smooth finish like modern hoses.

     

    Image24.jpg

     

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    They are the cloth braided. The lines on the carbs, as I recollect, were as pictured with all of the other hoses being the cloth braided lines. I have found the NOS cloth braided vent lines for the fuel tank. The seller of the large diameter vent hose claims that it is the last NOS in existance. I don't know if that is true, I doubth it, but I paid like it was.:blush: The rest of the, non-preformed lines at the tank will be replaced with the cloth braded line I ordered and clamped with restored original wire clamps. I will also replace the rubber hoses on the right side of the engine with the braided fuel line. The car in the photo has more emissions equipment than my 72 had when purchased. JLP

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    Interesting, my car had the non-braided type for all of the fuel supply & return hoses.  Three of the hoses have been replaced but I still have the old ones, don't ask me why, I just have trouble tossing old parts.

    The ones I had to replace (about 12 years ago) were extremely hard and some cracking was evident on the ends.  The rest are now getting quite hard so I probably won't get many more years out of them.

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    2 hours ago, CanTechZ said:

    Interesting, my car had the non-braided type for all of the fuel supply & return hoses.  Three of the hoses have been replaced but I still have the old ones, don't ask me why, I just have trouble tossing old parts.

    The ones I had to replace (about 12 years ago) were extremely hard and some cracking was evident on the ends.  The rest are now getting quite hard so I probably won't get many more years out of them.

    I have an attic full of parts for the same unknown reason! I can't seem to toss them away.:o

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    The NOS large diameter fuel tank vent hose delivered today. As soon as the 7.5 and 4.5 fuel line arrives I will be ready to put the tank back in the car. 

    IMG_0104.JPG

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    My car was built 4/71. So what I have done here is wrong. Water hoses, PCV and breather hoses are to be the cloth braided hoses. My fuel lines are to be the cloth wrapped. My float bowl vent lines to the air cleaner are to be what material?  Smooth fuel line hose? The sizes for the fuel lines are to cloth wrapped in 6 and 8mm? I did my clamp in yellow cad. Is that correct or are they to be like in the picture Clear Zinc. I have been also told not to use yellow cad plating. It was yellow zinc. Which is correct? I know I need black spark plug wires.

    DSC_9939 (2).JPG

    DSC_9936 (3).JPG

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    It seems to me I remember some hoses actually being a better fit with 1/4" hoses. I think maybe the supply from rail to carbs is actually 1/4". The 5/16 will work clamped down hard enough , but the 1/4 slides on tightly

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    I ended up with 4.5MM and 7.5MM hose. They are both a tight fit. I believe they will work well for this application and look good once the bling (restored yellow zinc original wire hose clamps) is added.B) 

    IMG_0113.JPG

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    On 2/28/2017 at 7:24 AM, CanTechZ said:

    Here is a source for fuel compatible hose that has an original black cloth wrapped look that comes in 6mm and 8mm sizes, as well as others. They have also have JIS fasteners that look interesting as well.

    http://www.newcoproducts.com/new/cohline/hoses.html

     

    Thanks for the info on this.  I picked up the BCWL-018 hose for my fuel line in the engine bay.  This hose looks closest to the OEM fuel line.  

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    @JLPurcell       113

    "I am planning to replace all of the fuel lines with cloth wrapped hose. I just measured and it looks like two sizes one for all of the supply side and another size for all of the return lines. I get 5 and 7.62 mm ID does any one know these sizes for sure? Thanks in advance. Jerry"

    I am really glad to see this post! Did these ID sizes work for you? If so  I am planning to buy these hoses for my June '72 S30. What were the total lengths of your purchases of each of the 5 and 7.62mm ID sizes? Put another way, "How much of each should I buy?"

    Also, I'd sure like to have contact info for the/a vendor of the large diameter vent hose. Can you help me?

    Jerry    

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    @JLPurcell       113
    Posted "I am planning to replace all of the fuel lines with cloth wrapped hose. I just measured and it looks like two sizes one for all of the supply side and another size for all of the return lines. I get 5 and 7.62 mm ID does any one know these sizes for sure? Thanks in advance. Jerry"
    I am really glad to see this post! Did these ID sizes work for you? If so  I am planning to buy these hoses for my June '72 S30. What were the total lengths of your purchases of each of the 5 and 7.62mm ID sizes? Put another way, "How much of each should I buy?"
    Also, I'd sure like to have contact info for the/a vendor of the large diameter vent hose. Can you help me?
    Jerry    

    It would great to get this requested information for others to use
    Thanks in advance
    Don


    Sent from my iPhone using Classic Zcar Club mobile

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    I just did all my fuel lines this year with Gates E85 rated hose.

    1/4" fuel rail to carbs - maybe 2 1/2 feet

    5/16" supply side to fuel rail & tank to steel line - about 6 feet

    3/16" return line from rail to steel line & steel line to tank - about 5 feet

    These all seemed to fit perfectly. Needed to use a little more hose on the supply side because I also converted to an electric fuel pump.

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    On 9/11/2017 at 11:10 AM, w3wilkes said:

    I just did all my fuel lines this year with Gates E85 rated hose.

    1/4" fuel rail to carbs - maybe 2 1/2 feet

    5/16" supply side to fuel rail & tank to steel line - about 6 feet

    3/16" return line from rail to steel line & steel line to tank - about 5 feet

    These all seemed to fit perfectly. Needed to use a little more hose on the supply side because I also converted to an electric fuel pump.

    So which size are you using here for a snug fit?  This is the fuel rail  line that connects to the line that comes from the engine floor. I tried 5 /16 but need to clamp it down very tight.

    20180307_195835.jpg

    20180307_195822.jpg

    20180307_195813.jpg

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    If this is the return line from the fuel rail I used 3/16 as I stated in the prior post. The supply side (where the stock fuel filter is) is 5/16.

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    On 3/11/2017 at 8:02 AM, JLPurcell said:

     once the bling (restored yellow zinc original wire hose clamps) is added.B) 

     

     

    Jerry,

    The rounded top, phillips head wire hose clamps are zinc plated.  Silver, not yellow cadmium.  I DO have later style wire hose clamps with hex head screws that are cadmium plated, but they are not the 'correct' style for my early cars.

    Edited by 26th-Z
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    1 hour ago, w3wilkes said:

    If this is the return line from the fuel rail I used 3/16 as I stated in the prior post. The supply side (where the stock fuel filter is) is 5/16.

    Its the sending supply side.

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    I used 5/16 on the line from the tank to the fuel rail. 3/16 on the return line from the fuel rail to the tank. What's the possibility that you have the lines on the fuel rail reversed?

    Seems like if these were inadvertently reversed it would cause all kinds of engine run problems.

    Edited by w3wilkes

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