series 1 gamma head swap with series 2 ?

[keri]

I think where I've misunderstood about the heads is the picture of the head above which is a series 2 must still have the old gasket attached as i can see more cooling holes in my head than i can see on that so thats why i thought they differed by the way the fresh air ports for s1 heads should i block these off on my series 2 or does it not matter as they were not blocked on the heads that came off.
thanks
Keri

[keri]

hi thanks for that i think where i have misunderstood s1 s2 heads is the picture above shows a series 2 head but at glance it looked different to mine but looking again it still has the gasket attached so blocks off some holes, also the fresh air holes on series 1 heads  do i need to block these off on mine i assume not as the heads  that came off were not blocked and it all seemed ok.

[neromoto]

If you are replacing a new intake or exhaust valve, check the stem diameter.
S1 and S2 have different stem diameters.

[keri]

Hi Neromoto yes as i had to send the head to my machine shop for a new valve seat to be fitted they confirmed it has 9mm valves   so should be later series 2 valves thanks for all the advise it really helps.

[keri]

thanks to everyone who has helped with this little problem i had well heads are ready gaskets on the way so onto valve clearance when i refit heads as I've read the rule of 9 does not work so i would guess clearance is checked between cam lobe and rocker arm and not rocker arm and valve and possibly on the lowest part of the cam i.e. opposite the lobe lift  end is this correct or is there a cunning way to do this?
thanks again

[Charles]

The valve gaps are measured between the "slipper" on the rocker and the back of the cam lobe (not the lifting part of the lobe).  I just rotate the engine as necessary to get the lobe facing away from the rocker - 0.012" (0.30mm) inlet, 0.014" (0.35mm) exhaust.

[Theo]

thanks to everyone who has helped with this little problem i had well heads are ready gaskets on the way so onto valve clearance when i refit heads as I've read the rule of 9 does not work so i would guess clearance is checked between cam lobe and rocker arm and not rocker arm and valve and possibly on the lowest part of the cam i.e. opposite the lobe lift  end is this correct or is there a cunning way to do this?
thanks again

See http://www.lanciagammaconsortium.info//htmlfr/gamma003.htm#VAL

[walter1]

Hi, I'm Walter1 from Italy. I agree with everything theo said. Before assembling everything, check the shoulders of the cylinder liners. If the paper bottom gasket is pressed beyond what is allowed, the barrel will be flush with the crankcase and no higher, therefore water or oil will leak.

[Theo]

Ciao walter1. Sto usando Google Translate per questo, quindi spero che abbia senso! Scusate il ritardo ma ho appena visto il vostro messaggio del 20 gennaio. Sono stato a Cipro per la maggior parte di febbraio. Ho cancellato un tuo messaggio a keri. Spero di aver cancellato quello giusto!

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Hello walter1. I am using Google translate for this so I hope it makes sense! Sorry for the delay but I just saw your message from 20 January. I was in Cyprus for most of February. I have deleted a message to keri from you. I hope I deleted the right one!
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