It will soon be replaced with a problematic, computer controlled, $550 part that will be failing every three months. Do you remember the accelerator cables? They are a $12 part that rarely, if ever failed. Now, they are a $500 computer controlled pedal that has lag, is problematic, and fails far more than any accelerator cable ever did. I wonder what ever happened to, "If it is not broken, do not fix it?"
@@motorcarnut it is also like auto engine shut off and restart when an engine lasts way longer if allowed to idle and not go to zero oil pressure on a hot engine with no coolant circulation every few miles.
Used to work at a thermostat factory. I ran an assembly machine that put the element in the middle there together. I made about 7500- 8500 of those things day for a few years. If I remember correctly there is a copper and wax pellet inside the brass casing the pressure of the wax melting from the heat makes it open and the springs close it. The ones like that one we made went into Toyota cars. We also made the integrated thermostats that had the injection molded casing.
If you didn't know, there's a special position to install. The thermostat. The open port on the thermostat is supposed to be aligned with open port on the manifold so that whenever the thermostat open there's no restriction on water flow.
Thank you. It’s a great explanation of how thermostat works. It’s always good to test them out before replacing with new one. Mine turned out to be good, just needed to do a flush and add coolant, no more issues.
That type thermostat with the disc down there all by itself is called a bypass type. As it opens at the top to let water flow to the radiator, that disc also extends to block the bypass/recirculation port to force the warm fluid towards the radiator… i have seen people remove the thermostat trying to get an overheating engine to run cooler, and it will not on a bypass type cooling system as the fluid just continues to take the path back thru the bypass port and overheat, unless it is blocked…
Hi, my e46 BMW 330ci engine overheats whenever the car engine is running on idle in traffic for more than 30 minutes. Could you help with a hint?? Thanks
Sounds like you said 107 degrees.. you must mean 170 because if it was 107 it would pretty much stay open all the time accept for a minute or two after cranking the engine
That definitely explained my answer, my car just got a new thermostat because my car was overheating, still overheats because the coolant is probably clogged Tested out the old thermostat, didn’t open at all on a 153F water
If you put weeker springs on a thermostat would open up with less heat or faster? How would I design one to open with less heat? I'm doing an experiment thst is not automotive related?
Please I have a concern I need help with. I have Toyota Sienna XLE 2000 model that has been well for me for a long time. However I discovered that the radiator fans aren't spinning. Instead my engine heats up after driving for a while with white smoke coming out of the engine bay. When I pop open the hood, I see coolant splashed everywhere. I can't detect where the coolant is splashing out from, because I can't seem to find any leaking hosts or caps. What could be the problem?
@@motorcarnut my dad was some one who went to the scrapyard if he found something he liked he would unscrew it or cut it but he was very if it works it is perfect
Duh that's. What a thermostat is it let's in Ratty- attior. It's open duh. Wait for it. It's closed. Done . It lets in 😃. It's open again. Ratty-attior. Yankee doodles !
May not be that easy to understand for a lot of people. I’m sure I can talk automotive technology way over your head but then how does that help, correct?
@@motorcarnut I do understand heat expands things. So heat expands something that pushes the spring and opens up coolant through way. I want to see that animation. :) I'll find one.
