1987 NISSAN 200SX ARE THE HOSES CORRECT

  • Tiny
  • LALABOY5418
  • 1987 Nissan 200SX

Heater problem
1987 Nissan 200SX 4 cyl Two Wheel Drive Manual 280000 miles

Dear Sir/Madame,

I had to change my starter out on this car and while doing so I had to disconnect the heater hoses to get to he starter bolt. I did not pay very good attention to where the hoses went. They are marked on the hoses as IN and OUT. My problem is I do not know if the top plug is the in or the bottom is the in. Which hose goes where. I hope I explain this well enough for you to help me. I don't know what will happen if I connect the hose the wrong way. At the fire wall the heater core outlets I will call them are on top of each other in a vertical position on on top of the other. Do the hose marked IN goes to the top or the bottom.

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Sunday, August 22nd, 2010 AT 11:30 AM

3 Replies

  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

Hi LALABOY5418,

Thank you for the donation.

The upper plug with the water valve is the inlet.

If the hoses are wrongly fitted, it could affect the A/C cooling efficiency.

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Sunday, August 22nd, 2010 AT 12:30 PM
  • Tiny
  • LALABOY5418
  • Member

How sure are you that the upper plug thingy is the inlet. And I did not see a water valve. Remember this is a 1987 NIssan 200 sx.

Can you respond ASAP

Lalaboy 5418

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Sunday, August 22nd, 2010 AT 1:40 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

The coolant has to travel from top to bottom in the heater core for efficient heating so the uper hose is the correct one for inlet.

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Monday, August 23rd, 2010 AT 10:48 AM

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