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Old 04-02-2018, 12:49 PM   #1
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Rb25 bottom end

Iím viewing a bottom end this afternoon, is there anything I should be looking for in particular thanks for any help


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Old 04-02-2018, 01:29 PM   #2
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You don't say whether its a short block with rods pistons connected, or just a crank?
If its a short block you should be able to get an idea of the piston/bore condition by just turning it over and looking, and if you can pull the sump you may be able to get an idea on the bearing condition, but in general its always better to budget for a refresh at least.
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Old 04-02-2018, 01:34 PM   #3
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Originally Posted by Tricky-Ricky View Post
You don't say whether its a short block with rods pistons connected, or just a crank?
If its a short block you should be able to get an idea of the piston/bore condition by just turning it over and looking, and if you can pull the sump you may be able to get an idea on the bearing condition, but in general its always better to budget for a refresh at least.


Sorry itís literally block and crank cradle, so Iím guessing if the bores are score free it should be fine, itís still standard 86mm bore size as-well cheers


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Old 04-02-2018, 02:21 PM   #4
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I would be asking myself the question of why it's a bare block. Cylinder bores can be measured but if it was me i would over bore it to something like 86.5 then you know it's good if it hasn't already had a really bore. But depends what you plans are with it.
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Old 04-02-2018, 08:25 PM   #5
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I would be asking myself the question of why it's a bare block. Cylinder bores can be measured but if it was me i would over bore it to something like 86.5 then you know it's good if it hasn't already had a really bore. But depends what you plans are with it.


Plan was to forge to have ready to do an engine swap into mine, so would of considered re bore, I had a look this evening no obvious signs of damage on the cylinders crank cradle look pretty good as well


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