Question about 1992 Toyota 4Runner

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1992 Toyota 4Runner, overheats, radiator,upper and lower hoses and thermostat new. Water pump has about 10,000 miles. upper hose heats up, lower hose stays cold. Heater blows only cold air. Help

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Thanks for choosing FixYa and welcome to the site. Have you checked to see if it is a coolant sensor? Have you checked to make sure the fans are coming on? Are you leaking coolant anywhere? Checked the cap?

Posted on Apr 10, 2011

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Posted on Jan 02, 2017

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2 Answers

Engine Diagrams


Hello. Here a non-photo diagram. Hope this helps!!!

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 ).
3. thermostat cap is held on by 3 bolts / remove thermostat.

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.

1. install new thermostat to water pump, make sure air bleed hole lines up with notch, install and tighten bolts, install a new lower radiator hose, fill cooling system.

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

Suzuki factory manual

Oct 21, 2013 | Cars & Trucks

1 Answer

I have a 1992 Buick regal that overheats at speeds of 40 mile n hour it has a new radiator, thermos stat, has been flushed an filled and bled have not changed the water pump when it overheats all of m


It is more than likely your water pump. Can you run it in park with the radiator cap off. The cap on the radiator not the overflow tank. When the temp opens the thermostat you should see flow if the pump is good no flow it is probably bad. If you don't see flow check the upper hose for temp and the lower hose. If the upper line is barely warm and the lower hose is significantly hotter, it is either water pump or thermostat, but since you replaced the thermostat I would be back to water pump. BTW you should use either a contact thermometer or an infrared to check hoses, although it was done by hand in the old days.

Feb 28, 2013 | 1992 Buick Regal

2 Answers

Engine overheat and no heat


Maybe your radiator is clogged.

Mar 12, 2017 | 2001 Nissan Sentra

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1988 b2200 is overheating--we've changed out the lower radiator hose, thermostat, and the upper hose is fine. Why is it overheating? Radiator, heat pump, or water pump?


!st check and make sure the water is flowing in the radiator, then check
the timeing, Mazda will run hot if the timeing is rong.

Jul 19, 2012 | 1988 Mazda B2200

1 Answer

Ok, g35 coupe 06,52k miles Had over heating problem in april 2010,replaced thermostat, all's well. Now Jan 2011 overheating again, noticed upper & lower radiator hoses collapse, changed thermostat...


Heres a couple of things you can check. Start your car and remove the radiator cap,(before it gets hot mind you) when it reaches norm operating temp, look inside radiator to see if water is circulating. If its not moving, its a bad water pump. Also, youre hoses should never collapse, if they collapse when they get hot maybe you need new hoses? Finally, if those dont work, flush out your radiator. Open the bottom cockpit and use a garden hose and let it flush out the system while the car is running, about 10 mins should do the trick. If the radiator looks clean inside then it doesnt need flushed.

Jan 04, 2011 | 2006 Infiniti G35

1 Answer

Hi,i,m a guest here .i have overheating problem with my toyota camery 92 v6...i got that my fan isn't working well , i changed it & the fan got better,,but it's not fixed yet & still i have...


How about the thermostat?

If your getting heat out the vents, the coolant is full, the upper hose is hot and the lower hose is cold that the t'stat is not opening.

If both the hoses are hot, the coolant is full, and you feel the fan pushing hot air than check the front of the radiator for debris build up. If there is no debris than the radiator could be plugged internally or the cooling fins may be severely rotted.

If the coolant is full, there is no heat out the vents and the upper hose is hot/lower hose is cold the water pump is not circulating enough coolant.

Nov 11, 2010 | 1992 Toyota Camry V6

1 Answer

Engine overheat,water pump and radiator in good condition, what is other problem?


While the car is running look into the overflow and see if you see bubbles going into it. If you do you have a head gasket leaking. Also while the car is running, feel the upper radiator hose temp. and feel the lower radiator hose temp and compare how hot they are. If the upper seems to be alot hotter than the lower hose, your thermostat is stuck shut.

Apr 09, 2010 | Toyota Corolla Cars & Trucks

1 Answer

Heating problem


If you changed the thermostat yourself and have noted that the lower radiator hose is cooler than the upper radiator hose, you may have installed the thermostat incorrectly or have purchased a faulty thermostat. A lower radiator hose that does not get hot (or as hot as the upper radiator hose) is a direct indication of a faulty thermostat. Please vote for this solution if you found this to be helpful. Thanks,

Jun 01, 2009 | 2003 Jeep Liberty

1 Answer

1992 TOYOTA OVERHEATS


Hello,i would replace the thermostat first.Check for water leaking around water pump,listen to hear if water pump bearing is shot and see if you can wiggle the water pump pully.if you can.bearing likely bad.,,hope this helps





Mar 10, 2009 | 1993 Toyota Pickup

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