Cranks but wont start.

[Wagner]

Originally Posted by 01 BMW_X5

+1

ENOUGH SAID

Just because you hear a spin, doesn't mean it is cranking. Did you read the post? He said it doesn't sound like it is spinning normally. Have you ever looked at a starter?

[primetime]

How about tow it to a shop and get a professional diagnosis? It could be the starter, it could be something else.

[premierX5]

Originally Posted by primetime

How about tow it to a shop and get a professional diagnosis? It could be the starter, it could be something else.

[JCL]

We seem to have very different definitions going on here.

The original poster said that it cranks, that is the title of the thread. Starters spin if they have juice, then the starter engages the ring gear, and that cranks the engine. Cranking doesn't refer to a starter, it refers to a crankshaft.

If the engine is cranking, in our diagnostic process, by definition we are already past the battery, starter, and engagement of the ring gear.

If it doesn't sound normal when the engine is cranking, it is either because the compression isn't as expected (for a variety of reasons) or the engine just isn't catching as it usually does, and the noise is normal, but not commonly heard, ie just not the same as it usually sounds.

I'm with the above recommendations to get a professional diagnosis.

[01 BMW_X5]

Originally Posted by JCL

The original poster said that it cranks, that is the title of the thread. Starters spin if they have juice, then the starter engages the ring gear, and that cranks the engine. Cranking doesn't refer to a starter, it refers to a crankshaft.

If the engine is cranking, in our diagnostic process, by definition we are already past the battery, starter, and engagement of the ring gear.

+1
I stand by my 1st post on this thread!!

[Wagner]

Originally Posted by JCL

We seem to have very different definitions going on here.

The original poster said that it cranks, that is the title of the thread. Starters spin if they have juice, then the starter engages the ring gear, and that cranks the engine. Cranking doesn't refer to a starter, it refers to a crankshaft.

If the engine is cranking, in our diagnostic process, by definition we are already past the battery, starter, and engagement of the ring gear.

If it doesn't sound normal when the engine is cranking, it is either because the compression isn't as expected (for a variety of reasons) or the engine just isn't catching as it usually does, and the noise is normal, but not commonly heard, ie just not the same as it usually sounds.

I'm with the above recommendations to get a professional diagnosis.

Finally a smart post



http://autos.yahoo.com/maintain/repairqa/transmission/ques036_4.html

[01 BMW_X5]

Originally Posted by Wagner

Have you ever looked at a starter?

I can remove from ANY vehicle, test, strip down, repair, reassemble and reinstall.