The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 1946-1950 => Topic started by: Johannes on 18.10. 2016 09:06

Title: Retighting of cylinder head
Post by: Johannes on 18.10. 2016 09:06

Hello,

I have to retight the cylinder head bolts of my long stroke. I haven't done it before. Do I have to remove both Rocker boxes or can I do that one after the others? Are there any advices how to proceed?

Regards Johannes

Title: Re: Retighting of cylinder head
Post by: mugwump on 19.10. 2016 12:17

Remove both rocker boxes. I believe that some head gaskets leak  ( especially btn cylinders ) because just tightening the outer head bolts and not the inner ones is too easy.

Title: Re: Retighting of cylinder head
Post by: Johannes on 21.10. 2016 10:54

I removed both. There are no cylinder head bolts under the rocker box of the inlet valves. 3 bolts are under the exhaust rocker box.