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NEED HELP! LUDE IS OVERHEATING & NO HEAT

 
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Old 02-23-2015, 02:54 PM
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Icon8 NEED HELP! LUDE IS OVERHEATING & NO HEAT

HELLO EVERYONE,



LAST WEEK I NOTICED THAT MY 1991 HONDA PRELUDE SI ALB WASN'T GIVING OUT MUCH HEAT AT ALL AND IN ADDITION THE TEMPERATURE GAUGE WOULD GO FROM NORMAL RANGE( HALF WAY) AND THEN SPIKE UP TO OVERHEAT THEN COME DOWN.
YESTERDAY I DECIDED TO CHANGE OUT THE THERMOSTAT SINCE THE LAST ONE LASTED ME ABOUT 62,000 MILES. I REFILLED THE COOLANT AND BLEED IT TO MAKE SURE NO AIR IN THE LINE.
THIS MORNING IT DROVE GREAT WITH ALOT OF HEAT WHICH IS NEEDED SINCE IT IS FREEZING IN CHICAGO RIGHT NOW, BUT RIGHT BEFORE I GOT TO WORK THE HEAT STOPPED AGAIN AND THE ONLY THING THAT BLEW OUT WAS COLD AIR AND THE CAR STARTED TO OVERHEAT SO I PULLED OVER AND TURNED THE CAR OFF.
ANYBODY EXPERIENCE THIS AND IF SO WHAT COULD BE THE PROBLEM??

THANKS
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Old 02-23-2015, 02:58 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

It sounds like you are losing coolant. Did you check the coolant level? Check the overflow bottle and see if it's full. You could have a hose leaking, or it could be a more serious issue. Don't drive it until you resolve this or you could do some serious damage.
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Old 02-23-2015, 03:54 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

I checked the coolant level and it seems to be fine. I am wondering if it could be a sensor of some sort but at around 116,000 miles I changed the thermo sensor and other one related to the coolant system.
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Old 02-23-2015, 05:37 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

Classic stuck thermostat symptoms. There's a bypass that allows some flow until the thermostat opens...but, it could be your coolant doesnt flow well.

How much gunk was in the one you just changed? You may need to flush your radiator etc.
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I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

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Last edited by bykfixer; 02-23-2015 at 05:40 PM.
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Old 02-23-2015, 05:46 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

The only times that happened to me was when I had a slight heater core leak. No hot air. Also could be a stuck open thermostat. Don't know why it would overheat with a stuck open thermostat though? There is a temp sensor at the bottom of the radiator too. Don't know if that one is actual temp guage reading or not but sometimes the rubber gromets on the bottom of the radiator wear out and it sags down to where the plug rests on the car frame.Are you losing fluid and does this happen when you're driving? A Stop light overheat would be a different answer for you.
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Old 02-23-2015, 09:35 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

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Originally Posted by Lespaul59 View Post
There is a temp sensor at the bottom of the radiator too. Don't know if that one is actual temp guage reading or not but sometimes the rubber gromets on the bottom of the radiator wear out and it sags down to where the plug rests on the car frame.
That's actually a switch not a sensor. That switch controls the main cooling fan.

I want to second what bykfixer suspects if you aren't losing any coolant. Just to make sure though, try bleeding your coolant again and see if there is any air in the cooling system. Just out of curiosity, what method did you use to bleed the cooling system the first time?
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Old 02-23-2015, 10:27 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

I usually put the front of my car on ramps to keep it as high as possible. I noticed that my IACV is slightly higher than the bleeder screw. When my heater core leaked, I had air in the system constantly.
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Old 02-23-2015, 10:55 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

I've read about people resorting to doing that. I'm not sure that's necessary. I've never had a problem getting mine bled sufficiently with the car on a level surface. Someone on the other forum posted a method where he attaches a hose to the bleed nipple and runs the other end into the radiator cap opening. No loss of coolant and no big mess all over the transmission. I'm gonna give this method a shot the next time I have to bleed mine.
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Old 02-23-2015, 11:28 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

sounds like you bought a fail safe thermostat from ****zone and it went out again....

I went through 4 of those stupid ****s before i said no more warranty just give me a normal one
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Old 02-24-2015, 08:55 AM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

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Originally Posted by luzer View Post
I've read about people resorting to doing that. I'm not sure that's necessary. I've never had a problem getting mine bled sufficiently with the car on a level surface. Someone on the other forum posted a method where he attaches a hose to the bleed nipple and runs the other end into the radiator cap opening. No loss of coolant and no big mess all over the transmission. I'm gonna give this method a shot the next time I have to bleed mine.
Trying to get my mind around how to loosen or fasten the bleed screw without sucess. But it is a dang good idear.


Hey goofy, try this place for parts etc.
1991 Honda Prelude 2 Door 2.05SI (ABS) KA 5MT Parts - HondaPartsNow.com


19300-PB2-023 - Genuine Honda Thermostat Unit (82) (Nippon Thermostat)
^^ gen-you-wine Honda part and cars it fits.
Probably worth a trip to the dealer though, as the shipping from these places is usually $10+, which is offset when you buy like $300 in parts for $200...

Luzer showed me this site a while ago. Best one out there imo.
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Quote:
Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead

Last edited by bykfixer; 02-24-2015 at 08:58 AM.
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Old 02-24-2015, 01:41 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

What temperature Thermostat did you install? They make different ranges (I.E 160, 180, & 195)

Here's a scenario: Let's say you installed a 195, and it doesn't open until it get's to that temp. When it opens, the 195 coolant rushes down to the sensor, causing it to spike... Because there is no flow until then, the coolant in the hoses, the radiator, heater core, etc would be cooler and when that cooler water flows to the thermostat, it would then close again, causing a surging effect until that water heated up to 195... And the cycle would repeat. Your car wouldn't show any signs of overheating as it is being maintained at a temp below boiling, but just wouldn't work "correctly".

Just an idea...

And FYI... I have an 89 Si and when I first turn on my car, I can feel heat coming out of my heater before my gauge gets up to mid way operating temp. It's gradual heat, but still before the car is fully warmed up so I think that coolant comes from the bypass... I will have to look at my hoses again to be 100% sure that I'm right.
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Old 02-24-2015, 10:18 PM
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Re: NEED HELP! LUDE IS OVERHEATING & NO HEAT

Possible clogged heater core ? You can verify by undoing both hoses, connecting a garden hose to one side and water should come out the other... That would not cause an over heat, but I believe the feed is after the stat.

Other than that... make sure the linkage is not broken to the climate control unit, slim chances, but the switch should have resistance

Do you see activity at the overflow tank from time to time? does it fill and empty. Rad caps can seize up and not allow for thermal expansion and burping of residual air. A higher rated cap will pressurize your system more and raise the boiling point of the water. Just funny how it doesnt over heat when you dont have the rad cap on.. The cap should have motion in all directions. They are cheap, worth a try. Or like previously stated, try a different thermostat, may be a factory defect. First you should find out though if your heater core is clogged. I can imagine the car would stink if it was leaking.
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