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Tombo
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PostPosted: Mon Mar 09, 2009 9:53 pm 
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I've had pistons come out like that. The top ring was broken into bits, some as small as rice grains.

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DOZ
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PostPosted: Mon Mar 09, 2009 9:54 pm 
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I've seen a few the same, very worn bores with broken rings on all four pots. Im not convinced its an overheating or ign timing issue as they have all been high mileage engines.

Daniel

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drmini in aust
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PostPosted: Tue Mar 10, 2009 6:40 am 
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When the bores wear tapered and oval (as they do), the rings flex in and out on each stroke. They are only cast iron and eventually this fatigues them and they break.
This is one reason a re-ring job is seldom successful on a high mileage A series.
Always it's best to rebore the sucker and fit new oversize pistons and rings. Then it will/should last like a new one. 8)
These days a set of Hypatec pistons with rings is not much dearer than a ring set for the old ones (if you can still find them).

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mini_kirsten
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PostPosted: Tue Mar 10, 2009 5:02 pm 
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He's going to rebore it to 20thou over

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mini_kirsten
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PostPosted: Sun Mar 15, 2009 10:08 pm 
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[UPDATE]

No 20thou over pistons were available so I got 30thou over instead.

Painted the engine bay today...let me know what you think :)

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NAV
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PostPosted: Sun Mar 15, 2009 11:23 pm 
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Looking good Kirsten. I like the black engine bay and may copy that when it comes time to remove NAV's engine.
It'll hide all the factory fitted oil leaks :roll:

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mini_kirsten
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PostPosted: Mon Mar 16, 2009 6:55 am 
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I think it looks stealth :P

My engine is painted as well but i'll take pictures when it's a complete engine again...all the parts are painted separately.

I had a dream last night I was driving my mini...I miss is so much :(

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gafmo
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PostPosted: Mon Mar 16, 2009 7:05 am 
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tell me you were also getting your hands dirty when the engine was being pulled out kirsten :wink:

Good work on getting rite onto it and cleaning everything up before the engine goes back in 8)

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BALLISTIC
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PostPosted: Mon Mar 16, 2009 8:44 am 
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Just a hint before you put the engine back in.........move the fuel pump from the top of the firewall to the rear subframe OR mount it below the line of the fuel tank outlet as it wont have to work so hard. They are a gravity fed pump and dont like to work so hard to keep the fuel pressure required.

Cheers Scott.

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poeee
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PostPosted: Mon Mar 16, 2009 8:45 am 
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BALLISTIC wrote:
Just a hint before you put the engine back in.........move the fuel pump from the top of the firewall to the rear subframe OR mount it below the line of the fuel tank outlet as it wont have to work so hard. They are a gravity fed pump and dont like to work so hard to keep the fuel pressure required.

Cheers Scott.


Yes indeed. Very easily done. Best thing i've ever done.

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mini_kirsten
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PostPosted: Mon Mar 16, 2009 5:27 pm 
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UPDATE UPDATE

MY ENGINE ISN'T A 998!!!!!!!

It's an 1100 or 1098 to be precise.

Well now that's a bit of a set back, as the piston's I've bought are for a 998!

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Harley
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PostPosted: Mon Mar 16, 2009 5:40 pm 
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But your engine is more powerful now! :D
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Blokeinamoke
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PostPosted: Mon Mar 16, 2009 6:00 pm 
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mini_kirsten wrote:
UPDATE UPDATE

MY ENGINE ISN'T A 998!!!!!!!

It's an 1100 or 1098 to be precise.

Well now that's a bit of a set back, as the piston's I've bought are for a 998!


isnt the difference just the crank?
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Mick
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PostPosted: Mon Mar 16, 2009 6:01 pm 
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blokeinamoke wrote:
mini_kirsten wrote:
UPDATE UPDATE

MY ENGINE ISN'T A 998!!!!!!!

It's an 1100 or 1098 to be precise.

Well now that's a bit of a set back, as the piston's I've bought are for a 998!


isnt the difference just the crank?


Piston gudgeon to crown height is shorter on an 1100.

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spraycanmansam
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PostPosted: Mon Mar 16, 2009 6:03 pm 
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Aside from buying new pistons, you could get the machine shop to mill of the tops of the pistons for the right height...
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