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Asphalt

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Germini, black forrest

20th Feb, 2012 at 01:54:05pm

Hi!

I've examined all my 1275cc blocks I have - the only with bores that look like they are usable is +.20 block. No vertical grooves, no 'steps' in the bores and pistons are also OK (ring gaps all OK ande within tolerance).

Only one problem: number two cylinder had rust on top of the bore. There's a horizontal mark in the bore after honing and the cylinderwall is colored dark. The mark is feelable by fingernail. It's maybe 2mm below the 1st ring on TDC.

Question: will this be usable?? It's not going to be a high performance engine. MG cam, stock large valve head - and that's it. Quick & dirty low-budget racing.

Cheers,
Jan

[X] nail here for new monitor

Vegard

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I pick holes in everything..

Chief ancient post excavator

Norway

20th Feb, 2012 at 02:23:57pm

Deliver it to a machine shop!

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

tadge44

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Post Whore

Buckinghamshire

20th Feb, 2012 at 02:33:21pm

I have the advantage of being able to change engines more easily than in a mini, so I would definitely use the that block and see what happens. If it smokes or rattles you are no worse off except that you will need to strip before following Vegards suggestion.

BENROSS

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Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

20th Feb, 2012 at 02:38:30pm

as above,






stevieturbo

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Northern Ireland

20th Feb, 2012 at 05:08:23pm

Clean it up with a bit of wet/dry and wd40 or oil and see what it's like.

It would need to be pretty severe rust to make it worth worrying about, which would leave obvious pitting.

Or a quick DIY hone of the bore to clean it off.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Asphalt

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Germini, black forrest

20th Feb, 2012 at 06:36:49pm

Will do that. Thanks! :)

Jan

[X] nail here for new monitor

MikeRace

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Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes!

20th Feb, 2012 at 10:54:12pm

Put a bog brush in the drill and run it up and down the bore

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
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Asphalt

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Germini, black forrest

21st Feb, 2012 at 02:50:06pm

After some bog brush (what!? *happy*) action... No, after some carefull honing:



Cheers,
Jan

Edited by Asphalt on 21st Feb, 2012.

[X] nail here for new monitor

Chalkie

1909 Posts
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Northamptonshire.

21st Feb, 2012 at 05:36:01pm

only looks like surface rust :) just clean with some Emare cloth and run oil down them while doing ti and shoild be fine but don't hold me to that

Asphalt

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Germini, black forrest

21st Feb, 2012 at 06:04:22pm

There's a slight horiontal groove, looks like a ring stuck to the wall and left a mark. But since it's the best I have - I'll give it a try... :)

[X] nail here for new monitor
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