BMW 323i overheated, pulled over, cooled engine. Now won't start.

Brett provides the best answer to this.

Brett Duxbury Mar 04, 2022
Hi Anonymous, can you get a radiator pressure test while engine running.

I Suspect exhaust from valves in engine building up pressure in cooling system. (blown head gasket or warped head)

OP is getting the engine pressure tested.

Good job!

check cooling fan

the hoses?
which engine?
is car in USA, we have our own engines here)
if in USA, log in to alldata.com and read all that in cooling chapter.
it too , will require engine type.

No danger involved, just useless. If ONE vehicle won't jump it, there's something drastically wrong with the engine. A charging system will only charge a max of 14 volts when charging a low or dead battery. Over that will hurt something. If you have two vehicles connected to your low battery, there's still only 14 volts going out from them and into yours. There is no reason why one jump vehicle won't charge and start your vehicle. Unless of course the jumped battery is really bad or has a bad/dirty connection. So clean your terminals before a jump. You may not need a jump.

There is no reset switches on cars. Have you let is cool sufficiantly? You may have a blown head gasket and this caused the overheating and if it is bad then you can be sucking too much air in the engine to get it started or worse water could be getting in. Have this checked out,

no the fan in front of the radiator is actully in front of the a/c condensor and serves to pull are across it for the a/c system. no fan on the motor will over heat the engine

take rubber hose and place near ear use as stethoscope, pin point noise, and pull apart, till problem is located. buy manual

check cam Positioning sensors

this engine is in a bad condition and the cylinder head will have to be remove and the lifter replaced. this engine overheated to far and when the cylinder head is off have the the head bolts threads replaced with hylicoils as this will pull out when installing the head.again

I wonder why the overheating caused you to change the engine instead of checking with the cooling system. Some time back my 323i overheated and coolant expansion tank burst open, but that probably due to ignoring the coolant level low light for a couple of days. I replaced the coolant expansion tank, thermostat and few hoses connected with the tank and it worked fine for me.
Try to check you coolant level - may be you should have replaced your water pump and not the engine.