When the weather is warm, we rely on our car's cooling system to keep temperatures in the engine compartment under control, and keep us on the road. Your cooling system is a series of components that circulate coolant through the engine to absorb heat, then circulate air around the coolant to get it out. If any part of the system stops working, you're on the side of the road while your engine takes a steam bath.The best medicine is preventive. You should flush your radiator on schedule to keep the system clean and well flowing. Unfortunately we aren't always lucky, and things go wrong. Let us help you figure out why your car or truck is running hot or overheating. Problem with 2000 BMW 528i idling problem when you start the car in the winter time. The care starts by idling aroun 1000rpm, which is normal for a cold engine start, but within 30 seconds it drops down to about 750rpm. Now the problem is that it fluctuates between 750rpm and 250rpm, almost shutting down, and sometimes does shutdown. Solutions: 1. I would first try to clean out the Idle control valve...some people have seen a 30% increase on cold start idle, there are several links in the DIY section.
2. If the sounds like classic Vanos seal issues. I had the same problem with mine in the cold weather. It would go away after the car warmed up. Replaced the Vanos seals and the problem disappeared. 3. Make sure you get the correct replacement seals or you'll end up with the same problem down the road.
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Only if overheated bad enough, it could seize up the engine. But if it was seized, there is no way to do a compression test. ?? Take the bas***** to court. If truly no compression, the engine is shot, they didn't overlook anything, but they should be liable for a new engine- a warranty is a warranty or it is worthless. Sue them!
If you believe the engine is locked you should put a wrench or socket on the crankshaft bolt and see if you can turn it (turn it clockwise)if it turns your engine it not locked or seized. to do a compression test the engine must spin with the starter. if an engine is locked or siezed a compression test is impossable.If this was helpful please leave good feedback
One of 2 things has happened here. Either the compressor clutch is seized to the pulley the belt rides on on the compressor OR the wiring for the clutch is shorted to a power supply. If the compressor clutch is stuck (seized to the pulley-usually with rust) on then the compressor will always turn with the engine. I have seen this several times over the years as I live in central new york where there is lost of rust on cars from salt on the highways in the winter. You can unplug the wire to the compressor and if it still spins with the engine running then it is siezed to the pulley. This WILL lead to compressor failure and WILL sieze the compressor due to overheating the compressor eventually. If the compressor does not spin with it unplugged and does when the wire is reconnected and doesnt stop ever while the car is running then it is shorted to a power supply somewhere. The Parasitic power problem can be hard to trace and is an unusual occurance. The clutch is probably locked up to the pulley but try my tests and you will know for sure.
Good luck and DO NOT try to unplug or replug in the compressor while the car is running.
Scott
if engine is siezed, you will not be able to turn engine over on the key or by the pulley wheel
it will be locked up
generally when an engine is seized it is due to overheating or low oil that basically causes two or more moving parts to weld togehter
you can reach down and turn the crankshaft pully by hand to see. If you have a manual transmission, it's even easier; push it a little, put it in 3rd gear, and pop the clutch, and see if the engine turns that way.
check the oil and coolant levels. if coolant is low pull the sparkplugs and try to turn the engine over if still not turning free remove the serpentine belt and try again, if it turns over ok check the pullyes on the front of the motor to see if they all turn free by hand. a serpentine belt can prevent an engine from turning over if a tensioner, idler, water pump, alternator, or power steering pump is siezed up or starting to seize. being your battery is bad I'm thinking probably the alternator is seized. hope this helps mike.
first thing i would make sure is to remove the belt from the engine and see if it turns then. possible siezed accessory pulley could stop engine. if still doesnt turn over with belt off, maybe remove spark plugs to see if will turn over then
It may be a mechanical seizure due to overheating. If this is the case you will need to strip the bottom end and physically drive the piston out. Once this has been done you will (probably) need to re-bore or re-sleeve and a new or very good piston acquired. (oversize if re-bored) It may be that water has got in and it is seized up due to rust,if you are very patient and in no hurry you could free it using a variety of agents, ie Plus Gas, diesel, petrol, a mixture of all these,leave for a few days, the occasional tap with a piece of wood and a hammer, repeat regularly, It may work. Good luck. Tony
engine could be seized...:( sorry...or a hose could have blown (radiator) and hurt or disconnected a main electrical line ...check fuses battery and cables..there is a bulkhead power junction on firewall high rt. side(passenger) immediately next to engine..battery located under back seat passenger side...first thing though..make sure you can turn the motor over by hand (breaker bar on nut at crank pulley) to determine if it is not siezed...good luck
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