What's the best way to clean heads that will be reused?
 

I'm going to strip down the topend of my motor for the new p's and c's. The heads were totally rebuilt two years ago and I have no intention of taking them apart. Is there any issue with having a machine shop with an aluminum friendly parts washer clean then while they are fully assembled and intact? I guess I'm thinking of the valves, springs, guides, etc, and whether there would be any harm.

I'm good with cleaning everything else, but is occurred to me that heads that have been in use may be a little tougher to deal with due to the oil and all of the "nooks and crannys".

If anyone has done similar or has any other tips and advice, it will be appreciated. Thanks,

Soak them in diesel fuel over night. Then rinse them with high pressure water. Then dry them with air.
Parts washers will work just be certain to dry the heads completely upon removal. If you/they let them sit the springs will rust.
rusty springs are prone to failure.

This will of course leave the valve stems dry so it really makes sense to at least disassemble them and apply a light film of lithium grease.

Thanks Henry. You've confirmed some of my caution. I'm going to call you the week after next for the goodies I need from you.

You're welcome.
Hey, I read about beer and pizza but at 9 am on Staturday, I'd be looking for coffee and donuts. :)

Hahaha. I'm not far from you Henry, I'd be honored by your presence. I'm thinking the beer and pizza when the engine's on the stand. Petersen's Donut Corner in Escondido has great donuts, and I consider myself and afficionado. I'll have those on hand for the "early shift" and coffee or espressos.

Actually, I throttled myself back on the drop, I'd like to be done at 9. With my lack of sleep lately, I've been starting my days early.