The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Re: Blown 750iL Engine!!! (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by David R. Shelvey on February 03, 2001 at 17:45:16:

In Reply to: Blown 750iL Engine!!! posted by David R. Shelvey on January 27, 2001 at 19:28:37:

Found there are several ways this could have made this catastrophic damage -

1. Over revving the engine. This could break a spring or float a valve.

2. Forgetting to unplug the fuel pump relays before doing a compression test.

3. Unplugging the throttle plug while the engine is revving. I think they were referring to the EML harness or maybe there is a throttle harness and an EML harness next to the diagnostic connector in the engine compartment.

4. Spraying too much cleaner into the engine while your revving it.

5. Unplugging one of the computers and then starting the engine, nothing will tell the injectors on the unplugged side to shut off.

6. Dropping something into the intake manifold (screw, nut, bolt).

7. Something in the oil (like a metal shaving) getting into the valve sleeve and causing the valve to stick open. The piston would come up and hit the valve head and the rest is history.


Follow Ups:


[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk.
Roadfly.com Logo © 1997 - 2009 Jump Internet Inc. All rights reserved.