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Hello everyone, I've been a long time browser and have always been able to sort my problems from other's posts, however, I can't find much on this particular gripe - hence I've finally joined!

My dad is a retired mechanic, he tells me reliably that my 'big end' is clicking - probably from cylinders 2,3 or 4. Dad won't touch it and neither will I!

Is this a huge job and how much should it cost?

thanks in advance.
 

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ok how much mileage has the car got. By what i can understand it could be the big end shells. It easy to replace but a very long job if you aint got the tools. My big end shells got worn out at just over 70,000 miles but i paid a alfa speacialist to take car of it as i aint got time. It was just as you described.
 

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Right. Sorry, not enough detail!

136 bhp model, W-reg, 137k miles, FSH, no major probs.

I think it is the 'shells' but Dad warns me about an 'oval crank' ?????
 

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Right. Sorry, not enough detail!

136 bhp model, W-reg, 137k miles, FSH, no major probs.

I think it is the 'shells' but Dad warns me about an 'oval crank' ?????
Clicking is normally a tappet, when the big ends wear you get a definitive rythmic knock that increases with revs, it is possible that a thrust bearing is worn and the crank is sliding in the main shells, can't see why your dad's so scared, it's only an engine, and probable one of the easiest to get the sump off and check the shells ever built.

If you want to read about an ovaled crank then check this thread, I've just replaced the crank in this car and this shows all the symptoms an other things we found wrong in that engine (though no use for your oil burner).
 

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Clicking is normally a tappet, when the big ends wear you get a definitive rythmic knock that increases with revs, it is possible that a thrust bearing is worn and the crank is sliding in the main shells, can't see why your dad's so scared, it's only an engine, and probable one of the easiest to get the sump off and check the shells ever built.

If you want to read about an ovaled crank then check this thread, I've just replaced the crank in this car and this shows all the symptoms an other things we found wrong in that engine (though no use for your oil burner).
It's a deep knock which gets pretty horribly noisy above 3k revs. As for Dad, he just won't touch anything Italian.

If it's an easy job, how long should it take a garage to check (change) the shells?

Thanks for the reply btw!
 

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I would have thought it should be a relatively straightforward job, remove exhaust, remove sump (lots of torx bolts), remove crank shells (probably 2 bolts per shell) replace shells, sump on, exhaust on . . . . etc etc

I can't comment on how much the shells would be, but I'd have thought this would be a 2 hour job.

Anyone shed any light?
 

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Along the lines of Smakeys comments. Tappets? tap!:D Small ends, rattle. Big ends knock, and main bearings grumble. Put a stethoscope round and about, or a long screw driver will do at a pinch, to isolate the noise. Oval crank, worn shell bearings= engine out,re- grind, overhaul, Blah! Blah! Good Luck with whatever you discover.:):
 

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Oval crank, worn shell bearings= engine out,re- grind, overhaul, Blah! Blah! Good Luck with whatever you discover.:):
No real need to pull the engine, just o/s suspension, gearbox, flywheel, oil pump and sump, then the crank can be lowered. Lock the cams and dont rotate the crank, the water wont need draining either, about a days work if it's just shells and no ovaling, otherwise just remember that the crank can only go 0.25mm oval from original size, those are the thickest shell you can get. The one I replaced was 0.45mm (proper fooked).
 

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Best use 'plastigauge' for an absolutely accurate rotational clearance check, to be 'ala perfektos' chums.:):

Oh to be whittling re-metalled con-rods hanging down from that crankshaft above, checking with Spectre Blue. These new fangled shell bearings make life so simple nowadays!:D:lol:
 
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