Loud noise from e-type engine

[hedde]

I have a e-type s2 coupe from 1969.

My engine started making a loud rattling/knocking noise. Its a terrible sound that forced me to stop the car. The sound starts on higher rev's 2000-3000 rpm, not on idle.

The sound comes from the middle of the engine, the cam followers or camshaft does not show evidence of wear.

If I remove spark plug wire cylinder 3 the sound disappears, removing any other spark plug wire does not make any difference.

Can anybody help me on how to determine to the problem.

Thanks, best regards,

Hedde

[christopher storey]

Oh dear, the fact that it stops on removing no.3. plug lead suggests that there is a big end failure on that cylinder . You need urgently to drop the sump off and haver a look at that bearing shell and the associated crankpin

[hedde]

Christopher,
Thanks for your suggestion, you where correct. Who said you can't diagnose a problem using the internet.

See (and hear) the video's on youtube:

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Bearing completely wasted, there is some damage on the crankshaft, i am afraid this is gone be expensive.