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12G290?
Posted: Sun Jan 18, 2004 9:39 pm
by winger300
Posted: Sun Jan 18, 2004 9:44 pm
by winger300
I think it may infact be a 12G940... its hard to tell when you blow the image up in Photoshop, but i think thats what it reads.
If this is the case, then (without opening up the previous debacles) what is the correct number of bolts 9 or 11? or does it not matter?
Posted: Mon Jan 19, 2004 10:19 am
by rayofleamington
It certainly looks like a 940
Most (all?) of the 12G940 will be 9 bolt.
11 bolts heads are useful on a race specification / highly tuned engine as the loads will be higher and so will the heat! On mildly tuned engines, 11 bolts is a bit of overkill.
Be a bit carefull with that head as there is surface rust on the rocker assembly mounting pads so it looks like it has been left unprotected for a long time.
(Does it have any burned valves?) He doesn't say that the head is 'good' or that it runs without excesive smoke (worn valve stems / valve guides).
Posted: Mon Jan 19, 2004 10:49 am
by winger300
yeah, i've e-mailed the chap for some more photos.
Posted: Mon Jan 19, 2004 7:30 pm
by les
Just out of interest, if it has 11 bolt holes chances are it's from a late cooper s, I'm not sure if the late sprites had 11. The 11th was a bolt rather than a stud and only had a torque of 25 ft lb.
Posted: Mon Jan 19, 2004 11:31 pm
by Matt
my 67 sprite has 9..... (i think)