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521 heater hose ?


raggmann

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Who's got a 521 they can look at and help a buddy out?

Both my 521's have screwed heater hoses.

The S hose goes to which pipe on the heater core at the firewall?

 

Thanks,

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Who's got a 521 they can look at and help a buddy out?

Both my 521's have screwed heater hoses.

The S hose goes to which pipe on the heater core at the firewall?

 

Thanks,

 

I'm pretty sure the "S" hose goes to the upper of the two pipes.

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Heat is heat so weather it flows one way or another is like the taste of a sandwich eaten upside down ........................ ? :o First post of the day and strong coffee......

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Heat is heat so weather it flows one way or another is like the taste of a sandwich eaten upside down ........................ ? :o First post of the day and strong coffee......

 

 

but if you eat your sandwich upside diown, all the flavour falls out.

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^^lol^^

 

btw, the 'S' hose is the upper and the longer hose is the lower. But, it doesnt matter which way the water flows, as long as it transfers heat. Also the upper 'S' hose is no longer avialable from nissan (discontinued). They do still make the lower hose, although its not the braided type, but still the same shape. For the 'S' hose youll need to find one at a local parts store, youll need 3/4 from the block to 5/8 to the core.

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^^lol^^

 

btw, the 'S' hose is the upper and the longer hose is the lower. But, it doesnt matter which way the water flows, as long as it transfers heat. Also the upper 'S' hose is no longer avialable from nissan (discontinued). They do still make the lower hose, although its not the braided type, but still the same shape. For the 'S' hose youll need to find one at a local parts store, youll need 3/4 from the block to 5/8 to the core.

 

I sent the dealership an email looking for both heater hoses and the pcv hose using the part #'s found on ratsun. Their response was that all 3 were no longer available.

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not available? i have a order in right now.

 

s upper in b7020-b2000

lower long out b7021-b2000

 

DONT BOTHER TRYING THE STRAIGHT HOSE FROM THE PART STORES. IT NO WORKIE. PLUS LOOKS LIKE SHIT.

 

Ebay will probably always have them.

http://cgi.ebay.com/Datsun-521-Pickup-Heater-Hoses-NOS-/220671433308?pt=Motors_Car_Truck_Parts_Accessories&hash=item33610ada5c

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Um, holy shit the price went way up. maybe its true. glad i bought extra's.

 

 

What are they charging you guys South of the 49th?

Maybe I'll have my buddy in KS order me what I need and ship them North.

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  • 3 months later...

What are they charging you guys South of the 49th?

Maybe I'll have my buddy in KS order me what I need and ship them North.

 

here at this if you have the part number you can find just about anything if you have the nissan part number and it will be OEM

 

www.buynissanparts.com

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  • 5 years later...
  • 7 months later...

To the best of my knowledge, heater hoses from Nissan are NLA, No Longer Available.  you can make one, see the post above.  One issue you will find is that the connections on the engine are 12MM (9/16 inch) and the heater are 1/2 inch (13 mm).  Most hoses I have found do not have the different size ends.  I have not had good luck making a 1/2 inch hose go over a 9/16 connection, or a 9/16 hose seal on a 1/2 connection.

I have found a short metal adapter that is 9/16 on one end, and 1/2 on the other end.  Using that adapter you solve the size problem.

I have also found a 9/16 hose that has a 90 degree bend that fits the front engine connection, and nicely has the bend just behind the L engine.  the metal adapter can be fitted there, and a second piece of 1/2 hose, with a 90 degree bend,  completes the connection to the heater.  this get you the long heater hose.

The short "s-bend" heater hose can be made in the same manner.

I would give you parts numbers for hoses, but I have to leave for work in about 5 minutes.

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9/16" is coming off the engine so even if I used/made a 1/2" hose I wouldn't be able to connect it to the block?  Does the OEM hose have different diameters on each end or is it all 9/16"?  

 

I ask because the OP in that thread says he used 1/2" all around and it installed without issue so confused abut the 9/16". 

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The Nissan part number I have on the package is, B7021-B2000.

The end that goes onto the heater core is slightly smaller than the end that goes onto the block under the fuel pump.

 

NLA and nowhere to be found on the net.  You got a spare?  Interested in selling it? 

 

DanielC, this the adaptor you talking about?

 

adapter_zpsjefqsdsx.jpg

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They will have plastic hose size adapters at most auto parts stores.

 

Yeah I was looking for them but that one I posted is the only 9/16 x 1/2 I could find online.    Daniel, do you part numbers for the hoses? 

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