Broken Crank?

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Johnny Disco

Member
Posts
91
Hi all. I've had a problem on our 1975 300TDi Disco Auto for several months now and not really had a lot of time to look into it.

When dropping the revs, there was a knocking from the engine area which I was assuming was possibly big ends or similar.

Anyhow, when I finally got to do some work on it, the starter motor would spin but the engine didn't turn, so I assumed maybe the starter was sticking or something. So I removed it and checked on the bench. It was fine.

Whilst I had the starter out, I thought I would check the flywheel to see if there was any damage to teeth etc. When I turned the nose of the crank, the flywheel only turned slowly with resepct to the speed I was turning the crank :eek:. So my guess now is that I probably have a broken crankshaft or at least the connection to the flywheel?

The engine seems to have good compression when I turn the crank so I am assuming it is not the woodruff or something stupid like that.

At least a broken crank would explain the nasty noise from the engine!

John
 
maybe drop the sump off then turn the crank again to see if all the con rods are moving at the same speed. failing that I wondering if the flywheel bolts have either come out or sheared off. sounds like you may need to drop the gearbox off or remove the engine to fault find. i'm sure somebody with alittle more know how will come along and have alittle more input.
 
Flywheel bolts have sheared off.
A broken crank would've disabled the motor immediately


Or maybe the ring gear is slipping
 
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