Question about 1991 Nissan Pickup

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Does radiator hose from the top go to the lower hook-up where the thermostat is

The manuel shows top radiator hose going to thermostat howsing on1981 model. i have a1991 model and it is running hot . my son changed radiators amd i think he has hoses backwards. the thermostat is in front on91 models and he has the bottom hose from radiator hooked up there . is this right?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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davidkay61
  • 23 Answers

SOURCE: running hot

Radiator Fan Control Relay Switch. I bet your electric fan doesn't run?

Posted on Dec 01, 2008

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  • 1779 Answers

SOURCE: I have a 05 Nissan

Hey iisha, although obvious, 1st thing to check is the coolant level. If it's low, the engine will run hot and the low level prevents coolant from circulating to the heater core inside the car, so the result is little or no heat, but engine running hot situation. The top rad. hose takes hot coolant from the engine, it flows down thru the radiator where it is cooled (w/ help from the fan) and the coolant returns to the engine at a reduced temp. to keep the temp under control, and it's returned thru the bottom hose (the result is the bottom hose should be cooler thant the top. There's more involved than that, so 1st check your coolant level, if it's ok let me know I'll help further. Hopefully the fix is that simple, and it is a rather common problem.

Posted on Dec 08, 2008

old marine
  • 1986 Answers

SOURCE: seized thermostat

Not always. If you have a KA24E (2.4L 4 cyl) engine, the thermostat is located where the lower hose connects to the engine. I have had to change mine. It's easiest to get to if you remove the power steering pump and set it to the side. The thermostat housing is directly below where the PS pump mounts.

Posted on Dec 12, 2008

  • 51 Answers

SOURCE: overheating

then the water pump must be bad in it .Take the rad cap off and rev motor up if it goes down the the pump is working if it spays of look at the head gasket being damaged .Check and make sure spark plugs are not wet either if one is soaked signs of a leaky head gasket

Posted on Feb 21, 2009

cda2z
  • 120 Answers

SOURCE: trying to change out thermostat on 1997 nissan truck

top hose near the middle of the engine

Posted on Jul 16, 2010

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The thermostat is located on the side of the water pump, the water pump is located just above the a/c compressor, the thermostat is fed coolant from the radiators lower radiator hose.
Thermostat :
1. drain coolant and tighten drain plug ( easier method : remove radiator cap, get big drain pan, place drain pan under lower radiator hose to radiator connection, remove clamp, slowly remove hose, allow coolant to drain into pan, now is a good time to remove radiator hose and clamp from thermostat housing )
2. remove thermostat cover / cap ( easiest to get at this when front of car is supported by jack stands and right hand side lower cover is removed ).
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You will notice that the thermostat's air bleed hole is pointing up and lines up with notch in water pump housing,,

ATTENTION :failure to install new thermostat in the correct location will cause engine to overheat.

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thermostat # 17670-77E00
lower radiator hose #17854-65G20
hose clamp #09401-36403
upper radiator hose # 17852-65G20

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1 Answer

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