Cylinder Head questions

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Tuggertim
Posts: 26
Joined: Wed Apr 25, 2012 6:52 pm
Your car is a: 1984 Pininfarina
Location: Pensacola, FL

Cylinder Head questions

Postby Tuggertim » Sun May 14, 2017 8:50 pm

Running into a bit of an issue with, what what I thought was, a simple rebuild. As with all things, never as "simple" as hoped. 1984 Pininfarina Spider 2000.

I sent the head to the machine shop for a head job. Lo and behold the aluminum head needed to be milled . I discussed this with the shop owner and we decided to mill no more than 2 thousandths (0.002") off the head, if needed. The machinist ended up taking 12 thousandths (0.012") off. This was a unmilled bone stock head. I have new 85mm 8.8 compression crown top pistons I'm planning on installing and the block had already been over-bored. I'm not searching for hugh compression or HP gains, just a reliable weekend car.

Can anyone tell me if 1.) What is the maximum a 1995cc FI head can be milled 2.) Is the milled head is going to cause interference with the valves 3.) Is there a oversized head gasket that can work (+ 0.010" or larger) 4.) If I can use a standard head gasket and no interference issues, how can/will this effect cam timing?

Anyone with any suggestions/help will be blessed with good karma :D

User avatar
So Cal Mark
Posts: 13839
Joined: Wed Jan 25, 2006 3:45 pm
Your car is a: Fiat
Location: upland, ca.

Re: Cylinder Head questions

Postby So Cal Mark » Sun May 14, 2017 8:55 pm

Fiat had a factory tool for measuring head thickness, it fit into the combustion chamber with a step to measure the deck height. I doubt that 012 would make the head too thin. I do have 080 head gaskets in my store for use with milled heads.
Mark Allison
allisonsautomotive.com Fiat and Alfa Romeo parts and service. Performance parts our specialty!
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