The BSA A7-A10 Forum

Technical (topic titles must be descriptive) => A7 & A10 Engine => Topic started by: Humble Pie on 19.10. 2010 17:27

Title: Alloy Head ID 18AQ ? rocker box 67-200
Post by: Humble Pie on 19.10. 2010 17:27
Have an Alloy head the only #'s I can find on it are on the left side below the valve Stamped 18AQ.

No casting #'s or stamps
 :!

Rocker box stamped 67-200   ??????????
Title: Re: Alloy Head ID 18AQ ? rocker box 67-200
Post by: muskrat on 19.10. 2010 19:42
G'day HP,
                the casting # should be on the back side just above the inlet manifold.
The rocker box will have 67-280 cast in the underside. It's a std. If that # is over stamped it's for a SR.
Cheers
Title: Re: Alloy Head ID 18AQ ? rocker box 67-200
Post by: Humble Pie on 19.10. 2010 19:48
ok rechecked

its a 67-260 on the box  but still nothing on the head
Title: Re: Alloy Head ID 18AQ ? rocker box 67-200
Post by: muskrat on 19.10. 2010 20:02
Don't know what the 18AQ means. Looks like a PO has polished off the casting #'s. Check the diameter of the comb chamber and inlet manifold.
Cheers
Title: Re: Alloy Head ID 18AQ ? rocker box 67-200
Post by: trevinoz on 20.10. 2010 05:10
The head number should be on the bottom side of the manifold.
Trev.
Title: Re: Alloy Head ID 18AQ ? rocker box 67-200
Post by: Humble Pie on 20.10. 2010 12:10
No #'s on head itself got a valve #67-1551  ,,so going by that guessing 67-1549
Title: Re: Alloy Head ID 18AQ ? rocker box 67-200
Post by: trevinoz on 20.10. 2010 21:47
Or 1571.