Lotus Elan and Lotus Elan Plus 2 Forums

Hello all
Could someone please advise what the size and type of thread is used for the 8 studs that screw into the head and hold down the cam cover on the TC engine.

I am not referring to the thread on the top of the stud, that the Seloc washers and nylon nuts screw onto, rather I refer to the bottom end of those studs that screw into the head itself.

Thank you

Hi J.J.
I just checked a spare new stud and it is 5/16" UNC
Eric in Burnley
1967 S3SE DHC

JJ,

As Eric says, 5/16” UNC. These studs have an unusual end on them the thread has been machined off and the end radiused. Do you have a sample to copy? If not I could send you an old one, but do not use this sample as it has been over tightened and is stretched.

Hope this helps,

Richard Hawkins