2wd or 4wd pistons cosworth

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23-03-2009, 07:46 PM

cos358

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2wd or 4wd pistons cosworth

hi, i took these pistons out of my old engine that i melted a few years back, just aint sure whether there 2wd or 4wd can anybody help! also how do i know if there standard size or oversized? thanx

Last edited by cos358; 23-03-2009 at 11:25 PM. Reason: [IMG]http://i555.photobucket.com/albums/jj470/cossie358/pistons009.jpg[/IMG]

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23-03-2009, 10:24 PM

LHD220Turbo

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easy way to tell is where the gudgeon pin fits, if its dead centre its 2wd; it its off centre then they are 4wd

4wd pistons had an offset pin assembly to help counter the piston slap experienced on 2wd

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23-03-2009, 11:30 PM

cos358

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thanx mate. some more pics if this helps, it looks in the centre 2 me.

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24-03-2009, 08:17 PM

costina

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4wd m8

the offset is not really noticable you will have to measure

Paul

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24-03-2009, 11:27 PM

cos358

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thanx for your help mate, they came out of a 2wd block so wasent sure if they 2wd cuz they look the same as the ones in my 3door which r 4wd pistons.

do u know what standard bore size is??

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25-03-2009, 10:10 PM

costina

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Quote:

Originally Posted by cos358

thanx for your help mate, they came out of a 2wd block so wasent sure if they 2wd cuz they look the same as the ones in my 3door which r 4wd pistons.

do u know what standard bore size is??

std 2 is 90.758mm don't forget to measure across skirt for this dimension

Paul

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