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Old 09-12-2012, 07:36 PM
BogiesAnnex1 BogiesAnnex1 is offline
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Originally Posted by Augusto View Post
I'm having low compression and vaccum reading issues due to the valve train not seating well,

I've made a compression test and it indicates valves not sealing well, I just lapped them so the seats are not the problem.

I belive they are kept open by the lifters.

Is it possible to convert them to adjustable, like the chevy engines?

Can I use chevy rocker arms in them? I6 or V8 pieces?

What is the rocker arm ratio of the I6 Ford engine?

thanks a lot.
I'm not to sure that lapping if that's all you did will be adaquate, especially if this is a heavy duty or an emissions head with hardended seats.

So that leads me to the question as to whether you used a seat cutter/ grinder before lapping? Lapping alone as a seat restoration process makes the seats too wide and the valve ends up not settling well on the seat. Also, did you restore/replace the guides. When these get loose the valve rather orbits the seat having a hard time setting itself down.

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