Well,

After taking the head off my Mk2 S found the following "groovy cylinder". Looks so neat and tidy it almost seems that it was there from new......

Would anyone have any idea of the cause of this? Guess a full rebuild on the cards....credit cards that is....

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Cooper S Mk2
Cooper S Mk1
ex Cooper S Mk2, various Morris 1100s, 1300s, 1500s, Leyland Sherpa!

Gudeon pin would be my first thought

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1963 Morris 850 Smoke Grey
1963 Morris 850 Shadow Blue
1965 Morris Mini Smooth Van
1966 Morris Mini Van
1969 Morris Mini Deluxe Resto
5/72 Clubman Gt

Definitely gudgeon looks like a resleeve

OUCH.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

Mate if your rods are press-fit on the small end then they are probably stretched oversize hence the reason your pin has moved. Sorry but not only do you need a new block but a new set of rods too.
G.

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car

Block can't be saved? AFAIK is original engine.......

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Cooper S Mk2
Cooper S Mk1
ex Cooper S Mk2, various Morris 1100s, 1300s, 1500s, Leyland Sherpa!

Yes it might be able to be saved, as mentioned above you might be able to re-sleeve (or re-line) the block, you'd have to get it checked out

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Depending what the bore size is now, boring that cylinder and fitting a liner should fix the bore. But the piston will be trash too.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I had one do that, I found it by chance when the diff broke - not that bad though

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did I tell you that I won a trophy?

yes definately a gudgeon pin move,,, but i`d bet the rod is bent from possibly6 a previous head gasket blow, hydraulic locked (filled with water over night & tried to start it in the morning type thing)
& bent the rod in the process (just a tad)
once a rod is bent it will tend to allow the gudgeon pin to wander "down-hill" & score the bore

i`ve seen them on both sides of the bore in some cases where (obviously) the rod has just lost all will to stay straight & is then all "wobbly" (for want of a better description,,, maybe "Jelly" would be a better word

anyways, very typical of a bent rod... sorry to say, but yes probly be able to fix with a sleave job
not cheap but might get away with just the one sleave

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Thanks guys,

Good chance to get the engine checked and also to get the engine bay cleaned up and painted, as (beside this problem and the crappy engine paint job) the car looks great and is rust-free......

"Always look on the brighter side of life.........."

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Cooper S Mk2
Cooper S Mk1
ex Cooper S Mk2, various Morris 1100s, 1300s, 1500s, Leyland Sherpa!

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"Show me the Mini!"

In the olden days
it was common practice to braze the score up and re-machine
They called them Tram Tracks

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1970 MK2 Cooper S

Good news,

Just got an email from the great GR himself, and it can be saved!

Looks like I am going to get even more experience (and skinned knuckles) doing an engine removal.

Luckily I have the help of the Ausminiers who have contributed their experience and hard won knowledge to make it easier than just following a 40 year old Scientific publications book which I still have from my first Cooper S.......

All good.....

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Cooper S Mk2
Cooper S Mk1
ex Cooper S Mk2, various Morris 1100s, 1300s, 1500s, Leyland Sherpa!

Well,

Just fitted the towbar to my car so I can go and borrow an engine hoist so I can take the engine out and take it on the trailer to get fixed.......the work is multiplying!

What would be the best way to lift the engine as the head is off - so can't use the head stud attachment method. Safe to sling it with some ratchet tie-down straps?

Any easy safe way that anyone could recommend?

Thanks in advance.

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Cooper S Mk2
Cooper S Mk1
ex Cooper S Mk2, various Morris 1100s, 1300s, 1500s, Leyland Sherpa!