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Every time i put the thermostat into my 94 Honda civic the car starts to make a squeaking/ seizing like noise after the car warms up roughly about 10 minuets. It starts quietly and then gets louder and louder the longer the car runs. All the hoses are hot including the lower hose after the thermo so it doesn’t seem that there is any blockage anyplace. The car its self runs fine i get hot air out of the vents and the heat gauge sits just under the half way mark. If i take the thermostat out tho everything runs fine but i have no hot air and the squeaking/seizing noise disappears. Ive already tried buying another thermo but both brand new thermos have the same result. When installed after the car heats up it sounds like a squeaking/seizing noise. Could this be the timing belt or water pump starting to go with the added pressure the thermostat puts in or … I live in Alberta BC so it be nice to have heat in my car when it hits -40 this winter and not have the engine seize on me some place :S
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Just a thought but I wonder if how the thermostat sits on the gasket would cause an issue. The thing im thinking is youre saying this noise comes after the engine has warmed up which would mean the thermostats open so I dont think itd be a pressure problem id lean more toward how is that thermostat affecting the flow to cause that noise. Again just my two cents tho
I think the one in there right now is stant and i forget what the other one was but they were different types both 170 degree tho stock or whatever honda puts in. My one friend sseemed to think that it could be the timming chain or belt that with the thermo in the car the engine heats up and then the belt starts to squeek and the hotter the louder it gets. With the thermo out the engine stays cold pretty much the entire time where it doesnt get hot enough for the belt or chain to start making niose.. any thought on if this could be true
Timing belts don’t squeal. It sounds like you have the wrong part or are installing it incorrectly. Have you compared the original one (that you removed to begin with) to the new one? You never indicated why you decided to change the thermostat to begin with.
What could potentially happen is a leak appearing after the car runs for a few minutes. That leak could slightly humidify your serpentine belt or something else, or could just cause a hissing sound.
Make sure that is not the case.
What we had one time was a thermostat being installed the wrong way around. I’m not sure what car it was on, certainly a Japanese one. I think it even worked somewhat, but it did cause eventual leakage. I think it was a mid 80ies Pathfinder 2.4. I remember hearing something from the engine bay rather than actually seeing the leak itself as it was hidden away behind a few hoses and wires.
the thermostat is the correct one i had the guys at honda look it up to be sure and i installed it the right direction with the pin up smack in the center as far as the thermostat it works perfectly other then that squeeking siezing like niose after 15 min or so but the reason i replaced it or put one in is because when i bought the car for 75 bucks the termo was just sitting in the brand new box inside the car. I asked the guy about it and he just said hed taken it out because the old one was bad and the fan wasnt comming on but then didnt put it in because he was just gonna crush the car untill i snaged it for 75 bucks ( the cost of the new battery he baught to get it to the dump) other then this niose tho there isnt anything else wrong with the car he said it always made that niose and he just figured it was the timing belt … but if that doesnt make a squeaking noise then im still at square one … any thoughts
It might be worth inspecting the water pump. Maybe it’s not spinning so freely when the temperature is increased or, as you said, with extra pressure.
I would try to fix this quickly because whatever it causing the issue could completely go later and that will cost you more and possibly leave you stranded.
[quote=”thisisbuod” post=66419]What a collection of idiotic ideas.[/quote]
Lets respect forum members opinions. Please.
Pressure test the cooling system. Check that the
radiator cap is the the correct one and psi rating.[quote=”thisisbuod” post=66419]What a collection of idiotic ideas.[/quote]
hah so what do you think then ?
If a car makes a certain noise under a certain condition, one should deduct from said condition a potential reason for the noise.
So working down from the thermo, it seems like it only occurs under regular operating condition, so closed loop 80°C (approx 190°F). Considering the time it takes for the noise to occur, perhaps the cooling fan or related belts could be a cause, as that time would need to pass before the car needed to start cooling operations. The cooling system would be a good start for diagnosis, and squeal from the engine compartment might suggest pulleys or belts being misaligned or wet.
Let’s not comment on idiotic statements and stay focused on finding a solution for the problem shall we.
i guess ill have to pressure test it and then get back to you guys the fan runs continuously because i need to get a new fan switch sensor so i just by passed it to have it run non stop. some one said earlier that the timing belt or chain cant make noise is that true ? because there is 309 000 on the car and that belt probley hasnt been changed in a real long time but some one said that it doesn’t make any noise… the other visible belts look fine and tight tho if i could post a video of the niose would that help ??
If the fan runs continuously and does not make an off noise, look for other sources. Is it a rubbery squeal or more like a repetitive abrasive noise?
The timing belt can potentially make noises if the pulleys are misaligned and the belt itself scrapes against the front of the engine. However, you may not be able to hear that. Probably, the pulley squeal would be far more obvious.
Posting a video of your noise would be very helpful, potentially move your camera around so as to help us zone in the area the noise is coming from a bit.
Good luck
PS and definitively +1 on what college man posted. Stethoscopes are very useful for identifying the exact location of a noise. Be very careful if you aren’t used to using them as they amplify noises like crazy and may actually lead to hearing loss.
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