What head size are rear main seal retainer bolts? Home » Keeping The Dream Alive! » Technical http://209.208.111.198/Topic107129.aspx

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By Montereycruiser - 11 Years Ago Tried to remove the rear main seal retainer in my 312 engine but 3/8 socket is too narrow and 7/16 too wide. Tried 10 mm , it goes on the bolt heads but slips when I put some force on to unscrew the bolts. Which size socket is correct? By thundercat - 11 Years Ago I just walked to garage..  mine takes 3/8 12-point    socket  regards Steve McD By Daniel Jessup - 11 Years Ago thundercat (8/25/2014) I just walked to garage..  mine takes 3/8 12-point    socket  regards Steve McD ditto By MoonShadow - 11 Years Ago Some are allen head. Chuck By Montereycruiser - 11 Years Ago Thank you guys! Checked the heads and they are not Allen type. The 6-point 3/8 socket seems too tight but I guess someone has used violence so I´ll make a new try with a 12-point. By MoonShadow - 11 Years Ago Use a thin wall socket too. Chuck By Bob's 55 - 11 Years Ago Cruiser, The head of the bolts are 12 point... That's why a six point socket won't fit. By Montereycruiser - 11 Years Ago Worked out with a 12-point socket, thanks!