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Answered 2014-11-20 01:36:11

A faulty thermostat in a 2001 BMW 325CI can cause a coolant leak. The coolant may be leaking out a crack in the thermostat or through a warped edge. In some cases the problem may be just a bad gasket and not actually a problem with the thermostat at all.

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Yes it can. A faulty thermostat can cause overheating which will cause coolant to be pushed out of the system.

The coolant sensor moniters the coolant temperature. A faulty thermostat could cause the engine to run cool.

First you have to determine the cause. Could be a faulty thermostat, frozen coolant (insufficient mixture of antifreeze), low on coolant or possibly a bad head gasket.

Engine Coolant Temperature Circuit Range/Performance issue... This DTC is usually cause by a faulty coolant senor, but can also mean that your engine's thermostat is malfunctioning.

A faulty thermostat or possibly missing thermostat. The thermostat controls the amount of coolant flowing from the water pump through the engine and then to the radiator. If it sticks open it will not let the engine heat up to design temperatures.

Many things such as low coolant, broken belt, busted hose, no oil, bad radiator, fan not working or a faulty thermostat.

Bad thermostat, plugged or damaged radiator, loss of coolant, ignition timing is off, faulty water pump, head gasket... and who knows what other problems can cause overheating.

In order of probablility: low coolant level, faulty thermostat, plugged radiator, damaged water pump, collapsing radiator hose.

Could be, low on coolant, stuck open thermostat, plugged heater core, faulty temp blend door actuator,

Low on coolant. Cooling fans are not operating. Faulty thermostat. Air flow through radiator is restricted. Coolant flow through inside of radiator is restricted. Bad head gasket.

The most common cause of overheating is a thermostat stuck in the closed position. Other causes of overheating could be a clogged radiator, faulty water pump, a faulty radiator fan relay, a faulty radiator fan motor, no coolant or low coolant level.

Yes it could and so could a stuck open thermostat or a plugged heater core or a faulty temperature blend door actuator.

Any coolant leak can cause an overheat.Any coolant leak can cause an overheat.

to add to this, a big YES,on the radiator cap .the radiator cap needs to be specific pressure rating. radiator caps do wear out. also the cheapest fix to start It is doubtful a radiator cap would cause a car to overheat. Common overheating causes are insufficient coolant, leaking coolant (into or out of your engine), faulty thermostat, blown cooling fan fuse, faulty fan temperature switch ( sender ), faulty fan, or a faulty fan relay.

Assuming the blower fan is working but it blows cold air, it could be,Faulty temp blend door actuator.Plugged up heater core.Faulty thermostat,Low coolant level,

a stuck closed thermostat,a blown head gasket,a cracked head,a faulty water pump,low on coolant,

Lack of coolant. Blocked radiator. Air lock in cooling system. Water pump failiure. Drive belt failiure. Faulty thermostat. Weak fuel mixture. Over advanced ignition timing. Faulty pressure cap onm coolant tank. cooling fans not working properly


The clutch fan will not cause this issue. The more likely causes are a stuck open thermostat or coolant not flowing properly through the heater core.

A faulty head gasket will cause power loss, coolant to mix with oil, and is a costly repair. Excessive heat is the primary cause for their failure.

The most common cause of overheating is a thermostat stuck in the closed position. However, other causes are: faulty water pump, clogged radiator, clogged hose(s), coolant leak or a broken drive belt.

Several possibilities - from easiest to most expensive: Faulty or inoperable radiator cooling fan - causing overheating. Faulty thermostat - causing overheating. Water pump failure - causing overheating. Blown head gasket - allowing exhaust gasses to escape into the cooling system and expelling the coolant.

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