[Staowners] CYLINDER HEADS

[starcars8 at comcast.net]

George, The high compression head is identified by the letters HC stamped into the side of the head above the #2-3 inlet ports. The high compression heads were fitted as standard on all Alpines. I posed the question of hardened seats againsy normal to three different machinists independently. They all said that with the power output of our engines there would be no benefit from hardened seats. I guess it's a matter of personal choise.Personally I have experienced no problems on any of my cars with regular seats. Oh by the way,if you fit a high compressoin head be sure to fit the spacer caps on the valves to maintain correct rocker height. Item 122 on the motor unit illustration in the parts book.

                                                                            Pete

-------------- Original message -------------- 
From: George Simpson - Forums <george.simpson.forums at neuf.fr> 

> Many thanks to the Group for resolving my query on which engine I have 
> presently have in the Alpine .... it turned out to be an early Mk 2. 
> Alan Orpet has practically finished testing my rebuilt carb on his Mk 2A 
> which has the high compression head. He suggested that as I have the old 
> Alpine Mk I engine complete, it would be useful to use that cylinder 
> head for a bit more power and to match the characteristics of the carb. 
> 
> The problem is, I don't know whether the P.O. already changed heads when 
> he put in the Mk II engine. The cylinder head presently not on the car 
> has two casting numbers besides the valve springs: 
> 
> C (or 0) 20794 and RMO 19721A 
> 
> I could take off the rocker cover and see what I presently have but 
> before I do this, does anyone have a head lying around from which they 
> can identify these numbers and link to a model? I have looked in the 
> Parts Supply manual but the heads have no such numbers associated. 
> 
> If it is the Alpine head that is presently off the car, this will be an 
> excellent opportunity to put in hardened seats (available from ???) and 
> tidy up the ports before installing this higher compression head. 
> 
> Thanks for any help 
> 
> George 
> Cognac 
> 
> 
> 
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