engine not getting warm and no heat

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engine not getting warm and no heat - 2/12/2007 6:53:20 PM    motocrazy8   Posts: 4 Score: 0 Joined: 2/12/2007 Status: offline 94 Ford Ranger 2.3L. My engine will not get warm and I also have no hot air. I have replaced the thermostat, flushed radiator and heater core (clean and clear).  Still not heating up and no hot air. Hoses are only warm and water is warm after 1 hr of driving I put a piece of cardboard in front of radiator. temp guage moved 1/8 and warm air blows Post #: 1

RE: engine not getting warm and no heat - 2/13/2007 5:19:42 PM    sjwoody   Posts: 54 Score: 0 Joined: 11/23/2006 Status: offline Sounds like you bought a faulty thermostat. (in reply to motocrazy8) Post #: 2

RE: engine not getting warm and no heat - 2/13/2007 7:57:17 PM    wheelsup68   Posts: 431 Score: 0 Joined: 10/30/2006 Status: offline I think I would look into a faulty themostatic fan clutch.  Might be hanging tight and drawing to much air through radiator and cooling too much.  Chances of the thermostat being bad and doing the same thing as your old one is very slim.  Like less than .005% IMO.  Only other thing I can think of would be a blend door problem in heater box, the gauge does not have to move very far on those trucks I've seen many of them not register properly. _____________________________ (in reply to sjwoody) Post #: 3

RE: engine not getting warm and no heat - 2/14/2007 3:59:22 PM    sjwoody   Posts: 54 Score: 0 Joined: 11/23/2006 Status: offline Yes, Wheelsup is right. Just yesterday I was checking out my fan clutch (for other reasons) and I should've thought of that. Can you spin the fan by hand? With mine, there was resistance, (it would only turn about 1/4 of a turn) so I took the fan/clutch assembly off. Holding the big nut on the clutch by hand, I then spun the fan several times and it loosened up and spun freely. Haynes manual says this is normal since the silicone fluid inside needs to be evenly distributed. You can save a lot of work and bypass all that if you just run the engine for a minute, then after shutting the engine off, immediately try to turn the fan by hand. It should turn freely. If your fan is locked and engaged all the time, it will keep your engine from warming up. I didn't have the special tools to get the fan off, but I used a long open-end wrench (1-1/16 inch as I recall) and just hit the end with a hammer to break the nut loose. It shouldn't be on all that tight. However, I'd guess the most common failure is the fluid leaking out, and the fan clutch would never engage causing the engine to overheat. Anything is possible though. < Message edited by sjwoody -- 2/14/2007 4:01:21 PM > (in reply to wheelsup68) Post #: 4

RE: engine not getting warm and no heat - 2/14/2007 4:14:30 PM    wheelsup68   Posts: 431 Score: 0 Joined: 10/30/2006 Status: offline The fan clutch on the Ranger 4 cyl bolts on to water pump hub thru 4 10mm bolts, It does not have the threaded hub like many others. _____________________________ (in reply to sjwoody) Post #: 5

RE: engine not getting warm and no heat - 2/14/2007 5:19:16 PM    motocrazy8   Posts: 4 Score: 0 Joined: 2/12/2007 Status: offline I have checked the blend door. its working fine, and the fan spins freely, heater core is clean, new thermostat. I am at my wits end here trying to figure out the problem. I just got this truck 2 weeks ago. I wondered why i got such a good deal. someone suggested a bad water pump, but i would think a bad pump would cause the engine to run hot. someone please help!! (in reply to motocrazy8) Post #: 6

RE: engine not getting warm and no heat - 2/15/2007 5:27:23 PM    motocrazy8   Posts: 4 Score: 0 Joined: 2/12/2007 Status: offline changed heater core today still no heat. changing water pump tomorrow. I get some heat but only when the engine is rev'ed (in reply to motocrazy8) Post #: 7

RE: engine not getting warm and no heat - 2/15/2007 11:13:06 PM    wheelsup68   Posts: 431 Score: 0 Joined: 10/30/2006 Status: offline Spring for a new fan clutch while it is off.  Water pump is easy on that truck only three bolts, just be areful not to crack your timing cover when removing.. _____________________________ (in reply to motocrazy8) Post #: 8

RE: engine not getting warm and no heat - 2/16/2007 10:40:55 PM    motocrazy8   Posts: 4 Score: 0 Joined: 2/12/2007 Status: offline Problem Fixed FINALLY!!! the waterpump was the culprit. I would think and bad waterpump would make it run hot (in reply to wheelsup68) Post #: 9

RE: engine not getting warm and no heat - 2/17/2007 10:19:20 AM    wildandhorsey Posts: 10 Score: 0 Joined: 10/28/2006 Status: offline thx for posting the solution of your problem. I watched this post very closely, just to learn and understand how things work and work out... I'm definitely a rookie concerning mechanical issues but I'm also willing to learn from all the discussions here, and it works. Everybody should follow your example and tell everybody the final fix. Many more miles for you in your now warm vehicle... (in reply to motocrazy8) Post #: 10

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