Upper radiator hose broke onupper radiator hose broke on the freeway we coasted to a stop and towed the car home, i replaced the hose and attempted to turn the car on it makes a grinding noise , i checked the starter it was ok, battery fully charged, spark from the plugs, and gas flowing properly, but the grinding noise is all More upper radiator hose broke on the freeway we coasted to a stop and towed the car home, i replaced the hose and attempted to turn the car on it makes a grinding noise , i checked the starter it was ok, battery fully charged, spark from the plugs, and gas flowing properly, but the grinding noise is all io get when trying to start it what could this be? Comments: Mar 01, 2010 - it sounds like grinding metal the starter motor isnt going fast enough and i believe the sound is coming from that direction, no the car will not start does the car have a timing chain or belt? Mar 01, 2010 - the oil; is clean
Cars & Trucks - BMW - 750
Answers & Comments
If you checked the starter and it is ok, but you say the starter motor is going fast enough? Do you mean after the engine was overheated and repaired, the engine is now turning very slowly, and the starter is straining to activate? What happens if the spark plugs are removed and the engine is turned over, does this make a difference? You did not mention the year or engine size for the chain or belt question.
Hello! Your vehicle has a timing chain...The timing chain guide, a teflon like material may have fractured and the chain may be jammed in the crank shaft pulley...The starter motor is attempting to turn a crank shaft that is jammed...
Also there is a service bulletin...#S.I.B170106 for your vehicle...
"At all times the anti-freeze and water must be premixed before pouring it into the engine. If premixing is not performed damage will occur to the water pump assembly".
The replacement of a timing chain can cost as much as $8000 at a BMW dealership...Shop around for a certified mechanic to inspect the damage...
Guru..............saailer
I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867
Hello! Excessive heat has caused internal damage... The starter motor can not turn the crankshaft freely...I have sent a comment which addressed the teflon timing chain guide which may have broken...
An inspection will clear this as a fault...If the guide did in fact come free, the chain would have come off at speed and jammed itself in the crankshaft pulley...
I see that you have given a low rating...I have not received a comment from you...Please advise...
saailer