Honda Prelude Forum

Problem.

A bit ago I went out to start my car... Started.... I came back when its usually "warm".. the windows were still iced over and i got in and it was warm and blowing really cold air.. i'm like.. ugh.. fml.. So I started to leave my driveway anyway because i have to get to school. Then I realize the temp guage is going over 50% (which it never does).. so i'm like.. fml.... So I parked it...


So...

Problem: No heat from heater inside car, car is over heating...

What gives? I need to get to school lol... And right now i'm late by about 7 minutes. Any help?


Edit:

I went out, started the car.. checked the coolant.. OK.
Squeezed the hose that goes from the head to the rad, i dont feel coolant going through it... Is that a bad water pump or a stuck thermostat?

start with the thermostat its cheap and easy to repair. Then check the pump

Its hard to feel if coolant is "moving" through the hose. You need to feel if the upper and lower radiator hoses are getting warm. If one is warm and the other is cold then that's a sign that either the thermostat or the water pump is going bad.

^^but yea if the coolant level is fine then start with the thermostat. follow the lower radiator hose to the back/side of the motor (kinda under the distributor cap but closer to the firewall). the metal housing that the hose attaches to is where the thermostat is.

Good Luck!!!

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95 Prelude VTEC (stock H22)
95 Accord LX (swap f22b1 VTEC)

I am not a mechanic .. AT ALL.... but, I do know the water pump is driven by the timing belt.... wouldnt it be making a crap load of noise if it was bad?

I am willing to bet above all else you just have a bad thermostat. Typical in our older vehicles.

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Ok..

Well.. Went to school.. 7 hours later.... Decided to **** with it.


So, first.. Popped the hood and checked all the lines and belts etc.. everything OK.

Got in prelude to start it... started it up(took like 30 minutes, cause my key doesnt like to turn sometimes.. but.. this time it really didnt want to turn.. i think i need a replacement.. anyone know where I can get oem keys?)

Prelude ran fine, no leaks nothing.. Waiting for the temp guage to rise to 1/4(usually where somewhat warm air starts blowing).. and somewhat warm air was blowing.. guage got to 1/2 after about 20 minutes (normal!!).. and was blowing hot air as it should.. car was not overheating and coolant i guess was flowing..

I guess now what's this mean..


This morning it was the coldest its been this winter so far for this lude.. I guess something may have been frozen?

sounds like a reasonable guess. still it was probably the thermostat that was stuck shut.

its also very alarming if you are right because that means that your coolant is improperly mixed or is old and needs replacement. to cover your bases, i would drain the coolant and replace the thermostat. then just fill with fresh coolant.

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95 Prelude VTEC (stock H22)
95 Accord LX (swap f22b1 VTEC)

I swapped the engine about a month ago tops and put entire new coolant in it.

but did you check the specific gravity of the coolant to figure out the freezing point of it?

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95 Prelude VTEC (stock H22)
95 Accord LX (swap f22b1 VTEC)

It sounds like your Flux Capacitor!!!

If that doesn't solve the problem then it's most likely your Thermostat!!!

Def ur thermostat!!!

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SIG by MS PEDO
BUSTR BUILT PERFORMANCE

http://www.preludezone.com/auto-show...tml#post376941

ya, either it got so brick out that your coolant actually freezed, or your tstat was stuck

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sig by Lazer

k man after all this everyone here for got to mention anything about vaporlocks your water pump and thermostat can be in 100% perfect order but if theres an airbubble in the coolong system you have no flow so its mayas well be considered just as bad as a closed thermostat let your car run till it gets half way check both hoses (should be both equally in warmth0 then check your radiator on its sides (left and right) both should be warm as well if one side is warm and one side is cold then you have a vapor lock in the radiator which can be just as bad. all you have to do is let it warm up lossen the bleeder valve (follow the lower radiator hose to the the motor it looks almost like an acorn nut with a little nozzle at the top) lossen this up if it starts bubblein there is simply air in the system then wait for it to start comeing out as if theres no air in (in a pouring manner) then tighten it let it cycle through a bit more then do it again probably 3 to 5 times total if you bleed it and nothing comes out or barley seeps out i beleive that concludes it might be the tstat hope i helped brotha

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Cars are like Girls, you want every pretty one you see, But in the end you only Love Yours...

same thing happen to my 90 accord when i first got it i changed the thermostat and everything was back to normal

I have the exact same problem. My car started overheating last night.. It has coolant, and I refilled it as well. Today, it began overheating again, and no hot air from the heater at all. The thermostat and radiator both were replaced a few months ago. Now, my idle is acting crazy as well. It's idling unevenly. WTF? I've jacked up the front of the car, took off the radiator cap and let it run to attempt to let the air bubbles, if any, come out. The car warmed up to half way pretty quick, but didn't get hot. I still have no hot air from the heater. I know if I drive it, it will probably run hot again. What can this be?

I'm not reading all these comments, but it could really only be 1 of 3 problems

1) coolant level
2) thermostat
3) water pump

Check in that order. Easiest to hardest, and cheapest to most expensive. If not 1, check 2. If not 2, definitely 3.

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4) clog in [radiator, block, heater core] in order or most probable

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95 Prelude VTEC (stock H22)
95 Accord LX (swap f22b1 VTEC)

It is most likely the water pump, or you have a clog in the water jackets of the block or head.

If you had a bad thermostat, you will still have heat since the heater core is in the engine loop.

A water pump can go bad internally without making any noise, or can randomly pump and not pump.

If you are sure it has no air in the system and it is full of fluid, then the water pump is the cause of the problem, water is not circulating through the engine. Try squeezing the upper rad hose like a pump, this will pull water through the system, the hose should get very hot after a few pumps.

If you do replace the water pump might as well do the timing belt.

Best of luck.

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Play the Prelude Picture Game

-86 Honda CRX D16a1 swap - AutoX car/beater
-93 Honda Prelude 4ws - Fun/weekend/date car

when no heat is present and the car is overheating 99% of the time its because there is no coolant-water to cool down the motor and transfer heat to the heater core.
pour in water-coolant mix w/e until it comes out of the radiator, then run the car and look until you find out where the liquid left your car.

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^^^ he's already checked that it has coolant

sorry but that was a completely worthless post of the most basic knowledge

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95 Prelude VTEC (stock H22)
95 Accord LX (swap f22b1 VTEC)