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rebuild problem need advice quick

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Old 12 February 2007, 04:45 PM
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dabow
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Default rebuild problem need advice quick

ok, i've took the pistons out of the block, i put them in order ready to mark as 1/2 & so on. but i kicked them, know they have right & left on them. but at the bottom of each piston, theres eather an 'a' or an 'b'.

so which pot does each go 'a' to the back or 'b'
and is it the same for the right side to the left.
please help.
Old 12 February 2007, 05:08 PM
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Alan Jeffery
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Using logic here! If you took one circlip out from each side, and left the other clip in, you might be able to figure out which way they go back if you know which side they came out of!
Old 12 February 2007, 05:16 PM
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dabow
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the problem is, i only noticed the letters after cleaning them.
other wise i would have thought that to.

i took all the clips out so i could clean the pistons.
Old 12 February 2007, 05:18 PM
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Alan Jeffery
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Doh!
Old 12 February 2007, 05:58 PM
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scoobyman95
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call hdc subaru (Howard) ask him as he rebuilds them day after day 01422 846868
Old 12 February 2007, 05:58 PM
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dabow
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i've just kind of read, there is a very slight difference in size from pist 'a' to piston 'b', is this true

does this mean the block is different to match each piston
i need to know how to sort this problem out.
thanks
Old 12 February 2007, 06:00 PM
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dabow
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Originally Posted by scoobyman95
call hdc subaru (Howard) ask him as he rebuilds them day after day 01422 846868
i'll give him a buzz mate. thanks for that
Old 12 February 2007, 06:00 PM
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scoobyman95
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if you call now he might still be there
Old 12 February 2007, 06:14 PM
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dabow
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just rang, but he gone home. need to ring back at 8 in the morning.
Old 12 February 2007, 06:37 PM
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Lateral Performance
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If you look on the top of the block, each bore is marked with either an "A", or a "B".

So all you can really do at this point is make sure A's go in A bores, and B's go in B bores.

There should also be a dot on each piston, and this should point towards the front on all of the pistons.

Did you take the rings out too, and have they also been mixed up ?

If so, I'd get the bored honed, and new rings.


Mark.
Old 12 February 2007, 06:41 PM
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dabow
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Originally Posted by Lateral Performance
If you look on the top of the block, each bore is marked with either an "A", or a "B".

So all you can really do at this point is make sure A's go in A bores, and B's go in B bores.

There should also be a dot on each piston, and this should point towards the front on all of the pistons.

Did you take the rings out too, and have they also been mixed up ?

If so, I'd get the bored honed, and new rings.


Mark.
no mate, the rings are fine. does this go for all subaru pistons mate, i'm going to have a look. thanks for that.
Old 12 February 2007, 07:00 PM
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merlin24
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As Mark described, and if you have "kicked" them - make sure the skirts,crowns + ring lands have not been marked or damaged.
Old 12 February 2007, 07:34 PM
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dabow
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Originally Posted by Lateral Performance
If you look on the top of the block, each bore is marked with either an "A", or a "B".

So all you can really do at this point is make sure A's go in A bores, and B's go in B bores.

There should also be a dot on each piston, and this should point towards the front on all of the pistons.

Did you take the rings out too, and have they also been mixed up ?

If so, I'd get the bored honed, and new rings.


Mark.
just checked, its right at the top of the block in the centre. is that it, your a life saver mate.

why diden't scoobyclinic say anything like that. i asked them about getting a set of sti v4 pistons. they said some thing about some being 'a' & some being 'b', but they said i can not get it right as there are 'c' pistons too. but should it be the same for the sti pistons too, being eather 'a' or 'b'.
well thanks again
Old 12 February 2007, 07:37 PM
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dabow
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Originally Posted by merlin24
As Mark described, and if you have "kicked" them - make sure the skirts,crowns + ring lands have not been marked or damaged.
no mate, there fine. when i say kicked them, it was more like tapped them but there was on a quilt. just incase any oil went on the floor.

i'll be selling the pistons soon, how much can you get for them
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