I found an automotive machine shop that was recommended to me that would clean the head, pressure test it, and resurface it for $75. It's very tempting instead of sitting here all weekend trying to get it perfectly clean. I'm thinking the resurfacing might be a good idea anyways-- just to be sure because I don't know what kind of heat this thing may have been subjected to. CouldÆve been under a lot of heat and that may be what destroyed the cam before I got it. Taking a little bit of material off shouldnÆt have an effect on the timing chain or anything. What is an acceptable amount for cleanup: 0.020ö (0.5mm)? IÆm an engineer in manufacturing and 0.5mm is a lot to me!
Lemme think what you knowà I mean, uhà Let me know what you think.
The price is right....
I think you should avoid cutting unless necessary. Every time these heads need to be repaired or get warped, they get cut. After a few cuts, you need an adjustable cam gear to correct the timing.
Speaking of repair, I would inspect the water ports and look for corrosion leading to the fire ring (common enough problem that you ought to inspect.) EZ fix for your machine shop- 15 minutes and a nice TIG weld, then mill it.
For decarbonizing, try some Castrol Purple cleaner or use a wire wheel.
You can inspect your own head for warpage with a straightedge and a feeler gauge.
As for techical specs, I'm gonna refer you to EB because I don't want to give you the wrong info by mistake.
As a matter of fact, EB is the one you should point your entire question to.
