Can anyone identify this tapping noise?

Good news: I've found the source of the knock. #5 big end.

The adjacent main had also started to show signs of wear.

Bad news: it's also wrecked the crank.

Attachment 176839Attachment 176840Attachment 176841

Geez mate I feel for you.
How can anyone buy one of these things and be confident that it will not **** itself.
LR should be dragged over coals for this situation.

Regards PhilipA

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Originally Posted by PhilipA

How can anyone buy one of these things and be confident that it will not **** itself.

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You can't. It took them a lot of years of trying, but Land Rover finally managed to build a car that was less reliable than a 1984 Holden Camira. Every time I leave the driveway I play the "will it get me home again?" cha-cha.

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Originally Posted by martinfrench

Good news: I've found the source of the knock. #5 big end.

The adjacent main had also started to show signs of wear.

Bad news: it's also wrecked the crank.

Attachment 176839Attachment 176840Attachment 176841

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The crank doesn't look too bad.
May take a grind ok to .010" under. Get it measured.

Quote:

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Originally Posted by martinfrench

Good news: I've found the source of the knock. #5 big end.

The adjacent main had also started to show signs of wear.

Bad news: it's also wrecked the crank.

Attachment 176839Attachment 176840Attachment 176841

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So no spun bearings though looks like some localised oil starvation. I suppose it is too late to check for blockages in the crank oil ways in the area of no 5.

This provides another aspect to the reasons for engine failures.

Quote:

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Originally Posted by martinfrench

Good news: I've found the source of the knock. #5 big end.

The adjacent main had also started to show signs of wear.

Bad news: it's also wrecked the crank.

Attachment 176839Attachment 176840Attachment 176841

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At least you have confirmed what is wrong. Any evidence that any of the main bearing shells had actually spun?

Also - with the crank now out, what was the crankshaft date of manufacture? Should be laser etched on one end.

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Originally Posted by Discodicky

The crank doesn't look too bad.
May take a grind ok to .010" under. Get it measured.

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The "good" journals measure 62.94, the worn one is 62.62. So I'd need to go +0.5 if I was to get it ground.

Quote:

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Originally Posted by 101RRS

So no spun bearings though looks like some localised oil starvation. I suppose it is too late to check for blockages in the crank oil ways in the area of no 5.

This provides another aspect to the reasons for engine failures.

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If I recall correctly, the main bearing adjacent was rotated ever so slightly (like 0.5mm). The oil gallery was still very much exposed but who knows...

Quote:

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Originally Posted by DiscoDB

At least you have confirmed what is wrong. Any evidence that any of the main bearing shells had actually spun?

Also - with the crank now out, what was the crankshaft date of manufacture? Should be laser etched on one end.

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No major rotation on the mains no. Very slight but not sure if it's a result of oil starvation or a cause.


Attachment 176847

Quote:

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Originally Posted by martinfrench

No major rotation on the mains no. Very slight but not sure if it's a result of oil starvation or a cause.


Attachment 176847

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Did you get a torque reading while undoing the bearing cap bolts by any chance?