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RMS cap bolt size

Started by Raindem, May 20, 2017, 01:04:54 PM

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Raindem

What is the correct socket for the RMS cap bolt on a 440?  It's not a standard hex head.  It looks like a Torx head but none of my torx sockets fit it.   I have a spline socket set that goes down to 3/8" but that doesn't fit either.  5/16" spline?

Thanks

Curt

Nacho-RT74

Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

Nacho-RT74

Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

Raindem

Thanks Nacho.  A 12 point star, that's not the same as a "spline" socket?

Nacho-RT74

Dunno, I just posted how I know it and 440source call it the same
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

Raindem

I believe they are the same.  My 3/8" spline socket wouldn't fit in the recess those bolts are sunk into.  So I took it to the grinder and made a thin-walled socket out of it.  That did the trick.  They seemed to fit the bolt OK and I managed to get both out without stripping them.

gtx6970

I just use a 12 point 3/8" socket