1963 L84 Valve Cover Screw/Bolt

[Lothar K.]

Approximate 1963 Corvette production number for switch from phillips head valve cover screws to "M" hex head bolts on the L84 engine...???

Thank you

[John D.]

Re: 1963 L84 Valve Cover Screw/Bolt

Lothar, I have been watching to see if you got any replies. My 9900 has Phillips and 19,000 I owned had hex bolts. I have thought that the change from phillips to bolts occurred in May but have seen original cars later than that with phillip screws. I see that the 6th edition says that late 63's had the hex head bolts.
Took me a long time to find the correct phillip head screws. They are a driven screw which means the Plus sign on the screw is wider and deeper than a typical hardware store screw. The head on originals is also thicker. Now maybe someone will chirp in. Thanks, John D.

[Edward J.]

Re: 1963 L84 Valve Cover Screw/Bolt

To add to Johns post the JM spells out late as being the last 4 months. Maybe someone will post dates on there hex heads. my car is like Johns 10,6xx. I think you may find a approx. date only and that during Judging, It may be a no deduct anyway with most, or maybe 1 pt..

[Lothar K.]

Re: 1963 L84 Valve Cover Screw/Bolt

My car is a late March build car....Thank you for the reply

[Edward J.]

Re: 1963 L84 Valve Cover Screw/Bolt

You should be safe with Phillips screws.