Question about 1999 Honda CR-V

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Temp gauze indicates engine running hot (not always happening) can move up to very hot....have radiator flushed and new thermostat-(8 month ago).two weeks ago two new cooling fans...mechanic cant find the problem.. I dont think its temp.sensor(?) as temp goes up slowly when driving, and shoots up when stationary..then reduces again when driving....mechanic has added sealant to the radiator

Posted by helmav on

  • Anonymous Dec 02, 2010

    does the water level kept going down,does it blow good heat,is the passenger floor wet?



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Check and see if your fans are coming ON. and also, see if there is a lot of junk such as dead bugs and **** stuck in the condenser and radiator. Let me know if this works out.

Good luck!

Posted on Dec 02, 2010


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1996 nissan altima no cabin heat, new radiator, flushed and filled, top hose hot, lower hose cold, newer thermostat checked good

HI Anon.
Remove your radiator cap (WHEN ENGINE IS COLD), run the motor and let it warm up a minute or two, have someone rev the engine a little while looking into the radiator. If the water goes down and/or you see the water moving, your water pump is good. If not this means that your water pump is bad and is not moving enough water through the system. Try Removing your thermostat and run the engine without it. Keep checking the radiator hoses to see if they are the same temperature. If they are not the same temperature the water pump is bad. If they are the same temperature your thermostat is more than likely the culprit. Hope this helps.

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Heater doesn't get hot on 96 chevy truck. Blows good, just cold. Replaced thermostat, flushed radiator. Any ideas?

Air Temperature Control Blend Door Failure No Heat or no AC (dependes on where door sticks)

In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.

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2002 dodge neon running VERY HOT ... what to do next?

Have you verified that system has been "burped" of air? That the fans kick on? Check radiator hoses for kinks. You can try running without the thermostat to see if that helps and can identify if the thermostat could be a problem. You may need to check your coolant mixture too.
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97 acura 3.2 tl temp gauge doesnt read anything stays at cold doesnt move at all, whats could it be???

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I put new thermostat on and it started running very hot again. I drilled to holes in the thermostat to increase the water flow and it still ran hot. It's weird cause the bottom radiator hose was running...

Flushing a radiator at home is most often a waste of time. The chemicals used by a radiator shop are far stronger than anything you get at the parts supply house. What happens is that the flow you see is deceptive as the water tends to flow around a partial restriction and does nothing to remove it.
Though your garden hose has a lot of pressure it doesn't have the volume necessary. A garden hose will usually be sufficient to flush out a heater core though as it's smaller.
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When the engine is at operating temp cover the grille and force it to nearly go into overheat...the electric fan should come on and the mechanical fan should lock up to try to counteract that.
Don't open the system when it's hot (you found that out already). And, don't allow the engine to actually overheat.
My bet without seeing it? Likely a partially obstructed radiator. 4.0 engines make a lot of rust residue even when maintained. If that's what you have in there, or even the 4cyl. It is more than likely.

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Just flushed rad heater core and block because i had no heat. flushed the system filled with new antifreeze. my temp gauge will change from 150 to 210 I have heat then i dont

Replace the thermostat. I have had bad luck with aftermarket thermostats on this particular year of GM/ Chevy trucks.They tend to stick closed and then fully open, thus causing the temp to sort of surge hot and cold. A good thermostat will slowly open maintaning a good consistant temp. I would recommend spending a little more and getting a GM thermostat.

Please take a moment and rate my answer..........Thanks

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My 2005 dodge neon sxt has been running hot for a few days.. 2 months ago i got it repaired for this same problem.. what can be the cause of it to continute to run hot?

Here are the least expensive items in order of least to greater...Check for proper coolant level in small tank next to the radiator. If low... refill to proper level. make sur eyou use the right stuff for you particular engine . Any good auto parts place can help with the "right stuff"
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Replace the radiator cap. if still getting hot, replace the temp sensing valve ( thermostat) at the engine side of the top radiator hose. If it looks grungy, you may still need to get the whole system flushed.

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Did you get a new one? or used and yes you need to replace thermostat , also flush radiator and system repeatedly as your heater core maybe becoming blocked buy some radiator flush and read directions! follow heater hose to engine, thermostat will be in the top line

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