efan

[Bob Ayers]

John is not even an auto mechanic but works with light bulbs LOL

He has a good explanation to overheating without a thermostat, and it has
nothing to do with the coolant circulating too fast. Obviously he has an understanding of the principles of physics.

 

[rockwerks]

He has a good explanation to overheating without a thermostat, and it has
nothing to do with the coolant circulating too fast. Obviously he has an understanding of the principles of physics.

A partial knowledge of application of physics and hydro dynamics. IF the coolant is moving too quick it is less effecient vehicle for heat transfer. I will stick to what the Ford engineer told me. And Im done this is going to go no where.

 

[Bob Ayers]

A partial knowledge of application of physics and hydro dynamics. IF the coolant is moving too quick it is less effecient vehicle for heat transfer. I will stick to what the Ford engineer told me. And Im done this is going to go no where.

It isn't hydro dynamics, it's thermodynamics!!!!

 

[rurouni20xx]

i remember thermostat removal in boat engine class, the source of most engines burning up because they didnt open at all causing the water in the block to boil/overheat motor/seize pistons. it was argued that removing the thermostat wouldnt hurt anything simply because your always running cold water to the cylinders. in theory it does work, but the other purpose of the thermostat is to hold the water in the block to maintain a certain operating temperature. when your engine is cold and warming up in the morning the thermostat stays closed to help warm the engine, then regulates the engine to that temperature the rest of the time. running without a thermostat makes the warmup time slower and you also have engine temperature fluctuations which affects the tune. a cold engine doesnt burn fuel as well as a warmed up engine, hence we have to richen the mix with autochoke or your fi compensates with an eot/water temp sensor. when it is to operating temperature the rest of the system returns to normal. by removing the thermostat you are allowing the fluid to blow by the cylinders and not transfer heat at different rpms. you now have an engine that has a very variable engine temperature based on throttle load (no thermostat to hold the water and maintain the engine temperature). this creates problems inside the combustion chamber as well. say you have an engine idling with a head temp at 190 degrees and you snap the throttle dumping cold water thru the block dropping cylinder temps to say 180 or 185 degrees allowing a crappy burn of your fuel/fouled plugs. also when your pulling a trailer your rpms are around 2500/3000 and you bog the engine up a hill. you increase throttle but your rpms still go to 2000. your engine is heating up but your not turning as much water. your head temp jumps and you start pinging if you hav a lean tune to begin with (economy maps and emissions vehicles are super lean, thats why most have a tow mode which is a different richer map and transmission converter lock in autos) the thermostat can close and maintain the cylinder temp to 190 when coming above idle like in the first instance. it can also slow the water travel at 2000 rpms to help it dissipate the heat better when under heavy load/low rpm and crack to increase velocity/pressure by allowing the water to shoot thru a smaller orifice. harder for me to explain in words but thats the best i can do so pardon my crappy examples.