Engine piston T-Slot

LeeBo · Posted: Fri Jul 11, 2008 6:18 pm Post subject: Engine piston T-Slot

Hello ! This is a "motor-head" question ! Can anyone enlighten me as to the purpose of the T-slot which is on the camshaft side of a Willys standard type cast aluminum piston ? I am currently installing a set of NOS Federal-Mogul forged pistons and these do not have the T-slot on them.

wesk · Posted: Sat Jul 12, 2008 1:26 am Post subject:

They were there to help with piston expansion from the heat.
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

LeeBo · Posted: Sat Jul 12, 2008 5:47 am Post subject:

Thanks Wes ! The forged pistons do not have the T-slot. Is this because they are much stronger and so do not need the slot for expansion ?

wesk · Posted: Sat Jul 12, 2008 10:44 am Post subject:

Yes I believe the stock piston expansion rate is higher than the new replacements.
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php


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