if it is more of a slapping rattle like metal to metal for every revolution of the motor check your crank pulley... my Zuk was making a similar noise... ended up being the 4 bolts holding the pulley on and sheared them right out of my crank sprocket... it sounds rediculous but trust me its worth checkin out
Failed thermostat.
The question is nowehere near specific enough to answer.
the flyweel has a crack in it it should get quiter when the engine warms up or when your going you will have to replace it Track down the source of the rattle it could be something as simple as a loose heat shield on your catalytic converter or serious like a cracked flywheel. have someone hold the brake while the car is in drive and listen under the car till you find where the noise is loudest.
Often a knock when cold is caused by piston slap, which is pistons rocking in the cylinders until they expand in size when the engine warms up.
No, warn engine parts will cause loss of oil pressure as the engine warms up, due to expansion betweeen moving parts. Hot oil is thinner.
I have 50,000 miles on my 06 and it has been doing the same for as long as I can remember r, if you find it please let me know.
False
NO, it will not damage the vehicle engine by turning the heater ON before the engine has warmed up fully.
You are burning coolant. What vehicle? did you do a compression test?
Then you need to have code checked, you can diagnose from there.
The preheater warms up the engine so it will start easier and in freezing weather will help to avoid freezing of the coolant.
Does it quit shaking when it warms up? What engine and year of Aerostar?