Piston crack, cylinder sleeve damaged
 

Hi,


I just got my car back from my mechanic

The car had a fluttering round and was running on high Fuel Consumption..

The engine was opened up and I took a photo of my piston

It was cracked. My mechanic replaced that piston and told me my cylinder lining is not an additional sleeve but built into the cylinder.. so he had to machine in a new sleeve


May I know if that is the case? Just took the car today and it's running ok.

Will it have any long term consequences? Given now 5 of the cylinders have lining and 1 is on a sleeve.

Thank you.https://uploads.tapatalk-cdn.com/201...d1323dcbc2.jpg

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He is one helluva Mechanic if HE "machined in a new sleeve" with the engine in place.
You need much more precise info. for us to help you

Sorry if im not making a lot of sense. Im just repeating what he told me.

He told me this:

M96 engine cylinders do not come with sleeves
Just cylinder liner built-into the aluminium casing
The cylinder liner is damaged
So he sent the case to another shop that specializes in resleeving cylinders
My particular cylinder (1 out of 6) had a resleeving done
The rest are originals (not sleeves but liners)


Hmm do these make sense?

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Wow. It's hard to believe that a piston that is in that bad of shape didn't take out the entire motor.

Hi I believe I spotted it early. Right after I heard the voice I had the car towed to the mechanic.

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Sounds like your mechanic did a good repair, BUT the cause MAY have been a leaking fuel injector washing oil from the cylinder wall causing the piston to crack. Recommend you remove the fuel injectors & have them pressure cleaned & tested before reinstalling, or the problem may happen again.

Brilliant diagnosis . It can do no harm.
When I dismantled & rebuilt my injectors as part of a total engine rebuild I was pleased to find the later/better '4 hole' version. I presume they are less susceptible to accumulating deposits and then leaking?
http://986forum.com/forums/performance-technical-chat/55115-fuel-injector-cleaning-swap.html

Don't know about that, I assume 4 holes are better than 1 for distribution & atomization.