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Author Topic: Engine won't crank  (Read 1021 times)

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Andy_J

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Engine won't crank
« on: 08 February 2009, 10:08:05 »
Hi all

I was just about to buy my mates 2.5 V6 Omega, when the egnine let out an almighty screech and ground to a halt. Car is an R-plate and has just had ne clutch and cambelts were done a year ago.

The engine will not turn over/crank properly, I can hear the starter enage, but the engine does not want to turn. Have tried another battery and jump-starting it off my Discovery with no luck.

Anyone got any suggestions, before we put it in gear and give it a tow to try and releae the engine?

Thanks

Andy
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Marks DTM Calib

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Re: Engine won't crank
« Reply #1 on: 08 February 2009, 10:19:25 »
When the cambelt was done, were the tensioners and idlers changed (as they should be)?

Is the engine turning over at all?

Is there any oil in it?
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Andy_J

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Re: Engine won't crank
« Reply #2 on: 08 February 2009, 10:48:25 »
Cambelts were done just before he bought it a year ago, we don't know if the idlers and tensioners were done ot the time. Car has about 130K on it.

The engine is not turning at all

Oil is about halfway between max an min of the dip stick

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Marks DTM Calib

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Re: Engine won't crank
« Reply #3 on: 08 February 2009, 10:50:04 »
Quote
Cambelts were done just before he bought it a year ago, we don't know if the idlers and tensioners were done ot the time. Car has about 130K on it.

The engine is not turning at all

Oil is about halfway between max an min of the dip stick


Well if they didn;t do the tensioners and idlers then they might as well have not bothered opening the bonnet.

You need to check the timing......can you turn the crank?
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Andy_J

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Re: Engine won't crank
« Reply #4 on: 08 February 2009, 11:17:47 »
Take your point, the belts may not have been done, didn't hear anything snap though.

Cant' turn the crank to mobe at the moment. I will try taking the aux belt off an seeing if it will turn

Andy
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TheBoy

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Re: Engine won't crank
« Reply #5 on: 08 February 2009, 14:44:38 »
What Marks DTM is saying is if the tenisoners weren't changed (its the tensioners that fail, not the belt), they may have failed causing the belt to slip several teeth.  If it slips more than about 3 teeth, pistons and valves will have had a bit of a chat, and you'll have 24 bent valves....
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Andy_J

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Re: Engine won't crank
« Reply #6 on: 08 February 2009, 16:28:49 »
right just been out to have another short at the car.

Crank will not move more than a couple of mm. forwards or backwards.

Managed to get the top of the cambelt cover pulled back enough to see the belt, it looks intact and still has tension on it. Can't see any damage to the belt (stripped teeth, scoring at the edge). Couldn't work out how to get the rest of the cover off to get a look at the bottom of the belt and see the tensioners

Andy
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vauxfan2k

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Re: Engine won't crank
« Reply #7 on: 08 February 2009, 16:35:40 »
could be clutch/flywheel related if the belt and tensioners are still intact  :-/
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al brown

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Re: Engine won't crank
« Reply #8 on: 08 February 2009, 19:34:41 »
I would take the aux belt off and try to crank it by hand/ I know it was a different car, but my parent old cav had an alternator that seized and it actually stalled the engine and locked the wheels at 60 mph! Got to be worth a try just in case.
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Lizzie_Zoom

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Re: Engine won't crank
« Reply #9 on: 08 February 2009, 19:46:10 »
I have mentioned this before on this site, but I had a 1996 3.0 Elite with an engine that suddenly refused to turn :o :o.

To cut a long story short it was soon discovered that the air conditioning compressor had seized and was stopping the engine from turning. ::) ::) :'(
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Andy_J

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Re: Engine won't crank
« Reply #10 on: 09 February 2009, 13:18:37 »
Thanks for the tips everyone..  :y

Had the aux drive belt off yesterday and engine wouldn't crank at all, Check altenator, aircon, tensioner, PS pump all spun freely with the belt off.

Tried giving the car a good shove and dropping the clutch in 1st, 2nd  & reverse gear. Engine does not seem to want to turn forward or backwards.  >:(

Think I have narrowed it down not to either
 1. something stuck in the flywheel/ring gear
 2. cambelt jumped and valves touching pistons.

If the cambelt had jumped would I be able to rotate the engine backwards at all ?

Andy
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Seth

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Re: Engine won't crank
« Reply #11 on: 09 February 2009, 13:34:53 »
Quote
Thanks for the tips everyone..  :y

Had the aux drive belt off yesterday and engine wouldn't crank at all, Check altenator, aircon, tensioner, PS pump all spun freely with the belt off.

Tried giving the car a good shove and dropping the clutch in 1st, 2nd  & reverse gear. Engine does not seem to want to turn forward or backwards.  >:(

Think I have narrowed it down not to either
 1. something stuck in the flywheel/ring gear
 2. cambelt jumped and valves touching pistons.

If the cambelt had jumped would I be able to rotate the engine backwards at all ?

Andy

I doubt it, but that depends on what's happened here.

My guess is the belt/tensioner(s) have failed, and probably allowed a valve to collide with a piston.
Can you remove the timing belt and see if the crank will turn?
That would be my next move.

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Seth

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Re: Engine won't crank
« Reply #12 on: 09 February 2009, 13:36:37 »
Quote
Quote
Thanks for the tips everyone..  :y

Had the aux drive belt off yesterday and engine wouldn't crank at all, Check altenator, aircon, tensioner, PS pump all spun freely with the belt off.

Tried giving the car a good shove and dropping the clutch in 1st, 2nd  & reverse gear. Engine does not seem to want to turn forward or backwards.  >:(

Think I have narrowed it down not to either
 1. something stuck in the flywheel/ring gear
 2. cambelt jumped and valves touching pistons.

If the cambelt had jumped would I be able to rotate the engine backwards at all ?

Andy

I doubt it, but that depends on what's happened here.

My guess is the belt/tensioner(s) have failed, and probably allowed a valve to collide with a piston.
Can you remove the timing belt and see if the crank will turn?
That would be my next move.


Check the timing marks for alignment BEFORE you remove the belt!
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