3 ms·

Partially agree, but... - Some of the manufacturers at times have moved back towards Iron-Block/Aluminum-head designs (rather than all aluminum.) Thankfully ye

Partially agree, but... - Some of the manufacturers at times have moved back towards Iron-Block/Aluminum-head designs (rather than all aluminum.) Thankfully yes modern gasket technology and metallurgy has improved but there is still extra wear and tear as a result. - Depending on the way the ECU is set up, there may be other advantages to pre-warming the block. As an example, my WRX sometimes gets -really- cranky starting in cold temps. But it's not the start I'm worried about. - Below ~25F, the fluid in the clutch gets to the point where I can sometimes pull my leg off the clutch and wait at least a half-second before the pedal 'thunks' up. An engine block heater would probably help with that a bit. - The way the ECU is programmed, there is a -long- delay from when the car switches from open loop (just working off a MAP or MAF sensor) to closed loop (looking at the O2 sensor). In cold enough weather, If the temp gauge doesn't reach a certain point before I hit the highway, it -never- hits closed loop and my mileage is absolute trash. Not every car is set up like this, but more than you think. It's an emissions thing.

sandworm101 6y ago
Most of your clutch's working fluid is nowhere near any block heater. It is in your clutch master cylinder right above your clutch pedal. It is essentially inside the cabin with you rather than under the hood with the engine. You might have a fluid reservoir under the hood but, warm or cold, that fluid isn't being used unless you have a leak. As for running temperatures, the standard trick is to reduce airflow across the radiator. Trucks put on "bras" or you can rig up something made of carboard in front of the radiator. Always cardboard because it is soft enough not to damage anything if it gets loose.

3 ms·

Partially agree, but... - Some of the manufacturers at times have moved back towards Iron-Block/Aluminum-head designs (rather than all aluminum.) Thankfully ye

by to11mtm 6y ago

sandworm101 6y ago
Most of your clutch's working fluid is nowhere near any block heater. It is in your clutch master cylinder right above your clutch pedal. It is essentially inside the cabin with you rather than under the hood with the engine. You might have a fluid reservoir under the hood but, warm or cold, that fluid isn't being used unless you have a leak. As for running temperatures, the standard trick is to reduce airflow across the radiator. Trucks put on "bras" or you can rig up something made of carboard in front of the radiator. Always cardboard because it is soft enough not to damage anything if it gets loose.