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240z Master Vac Hoses


lm71z

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Does anyone know where to get the 2 master vac hoses for a series 1 240z? I can't seem to find them anywhere. Nissan no longer has any available and I haven't been able to find them on any other z website.

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Unless you can get some of those people who may have stocked up while they were still available to part with a set, you may have to build an alternative from some other car or source. I don't know of anywhere to get them new now.

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Does anyone know where to get the 2 master vac hoses for a series 1 240z? I can't seem to find them anywhere. Nissan no longer has any available and I haven't been able to find them on any other z website.

This is the one I made. You could buy the hose and put the wires inside.

In the first picture, Left ones are original non braided ones. Right ones are reproduction ones (braided)

Esprist

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Edited by esprist
adding pictures
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Does anyone know where to get the 2 master vac hoses for a series 1 240z? I can't seem to find them anywhere. Nissan no longer has any available and I haven't been able to find them on any other z website.

If you shop around, and spend some time, you could made something like this, too. They are all hand braided and hoses inside are Nissan Genuine parts.

Radiator upper hose, lower hose, heater hoses, bypass hose. These are my test units with 4 different pattern(materials) and see how well they work and how long they last. If you could try them, why spend $150-200 for a new old stock hoses that are so expensive and not very dependable in a long run.

I am hoping someday, big supplier like MSA could make good reproduction ones and sell them at reasonable price.......

Esprist

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If you shop around, and spend some time, you could made something like this, too. They are all hand braided and hoses inside are Nissan Genuine parts.

Radiator upper hose, lower hose, heater hoses, bypass hose. These are my test units with 4 different pattern(materials) and see how well they work and how long they last. If you could try them, why spend $150-200 for a new old stock hoses that are so expensive and not very dependable in a long run.

I am hoping someday, big supplier like MSA could make good reproduction ones and sell them at reasonable price.......

Esprist

Excuse me for not understanding, but how are you making these formed, cloth covered, hoses? Did I miss something in a previous post or other thread?

Dennis

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I'm guessing a little glue to hold on the various sleeving types, and a stiff wire on the inside to hold the shape of the hose. Nice look, but a PITA to make and maintain. That said, this seems like an affordable alternative to the stock unobtainium.

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Excuse me for not understanding, but how are you making these formed, cloth covered, hoses? Did I miss something in a previous post or other thread?

Dennis

Well, as I mentioned, I am trying different materials on a car to see how they function and how long they last: Plastic, steel, fiber, and cloth. To cover the hose and place them in right position, I have tried sylicone glue. Please remember these hoses expand once they get hot water running through. Also the hose tends to carl up at the end specially when you try to slip it on the inlet. In this picture, I have a piece of shrink tube in small width just in case. So I am still in reseach and development.

Esprist

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Carlos!!

If you want us to buy a new Nissan - start resupplying the parts for our old DATSUN!!

The bumper sticker that the Classic Z Car Club should promote!! Print them at home on your ink jet - and start mailing them to Nissan USA and Japan HQ !!

FWIW,

Carl B.

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Well, as I mentioned, I am trying different materials on a car to see how they function and how long they last: Plastic, steel, fiber, and cloth. To cover the hose and place them in right position, I have tried sylicone glue. Please remember these hoses expand once they get hot water running through. Also the hose tends to carl up at the end specially when you try to slip it on the inlet. In this picture, I have a piece of shrink tube in small width just in case. So I am still in reseach and development.

Esprist

Thanks, that sort of clears it up for me. Keep us posted on your experiments.

Dennis

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  • 2 months later...

Sorry to bring back a semi-old thread, but this question works well here. I am wondering what the interior diameter of the master vac hoses are. Mine are really starting to crack and I don't want to remove them until I have a reasonably good replacement. I simply cannot find them anywhere. Thanks!

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Hi Arne,

That is a good point.The fuel hose is soft,not like an original vac hose.

But I do not think it is collapssed when the car is running and braking.(But I can not say that for sure because I have naver seen the vac hose when the car is running)

I have been driving Z432 very often, 10000 miles in 2 years.But I do not have any trouble so far.

kats

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Hello Kats, Arne,

Your point about sufficient rigidity of the fuel hose was also a concern of mine. I have two of these fuel hoses, one for each of the master vac hoses, and am planning to use 1/4 inch copper tubing inside these fuel hoses to both shape, and strenthen them.

Can you think of any reason that copper tubing wouldn't work, instead of using the brass rod that Kats used? I will also put a lenth of 1/4 inch electrical wire in the copper tubing while shaping it, just to keep the copper tubing from kinking during the bending process, then just pull the wire out (hope it doesn't bind up in the tubing).

Let me know what you guys think, and, Kats, this was a terrific idea.

Dan

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I think the copper tubing to reinforce is a good idea. In my old days in auto service, I've seen booster hoses collapse under high vacuum. The brakes still work, but it leads to a significant loss of power assist. That is why brake booster hoses are all internally reinforced.

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This is my fake vac hose, almost 2 years passed and added 10000 miles since then.

The last picture is for comparison, the left one is an OEM vac hose(no-cloth braided) , the right one is OEM FUEL hose(Gas tank to reservoir) which is used for fake vac hose.

kats

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Edited by kats
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  • 1 month later...

Has anybody came up with a solid solution to this ongoing challange. I had completed a nationwide dealer search for the Nissan part number and called Canada for the part number. There is one hose that is totally out of production that does not exist anymore.

WHY IN THE WORLD WOULD NISSAN DO THIS TO A BRAKE PART FOR OUR CARS?

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  • 2 weeks later...
Has anybody came up with a solid solution to this ongoing challange.

A solid solution, as in a solid line? Yes. I simply bent a length of 3/8" copper tubing to shape, painted it with black epoxy, and connected the two ends with short lengths of generic hose. I used a pulley wheel (i.e. for ropes) as a form for bending, so that the tubing wouldn't kink. Finally, I took my OEM vacuum line, which is still in "OK" shape, and put it in storage. My replacement is 100% functional and durable and looks quite alright.

BTW, I also replaced the rubber hose from my valve cover to my throttle body with a 1/2" painted copper line. I made my own flame arrester out of bronze screening, which I soldered into the tube.

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