Subaru BRZ review

Subaru BRZ: It's Thinker Than You Fast It Is

http://online.wsj.com/article/SB10001424052702304724404577293812942708538.html

Rebuilding heads

Thought I'd post some photos from last week when we rebuilt a bunch of cylinder heads.
Begin with a clean, machined head with surfaces and guides that are to spec. Using compressed air, blow out passages to ensure cleanliness.
Lay out your parts, checking spring is right side up and all parts are accounted for. Check valve seat for surface quality.
1. Install valve stem seals.
2. Insert lubricated valve.
3. Lubricate area then place spring and spring retainer in position.
4. Using valve spring compressor, place keepers (using grease as "glue") then slowly back off to seat valve.
5. Test that valve is installed correctly by hammering end with a rubber mallet.

Starting to lay out all my parts: here are valve spring retainers, springs, and valves

Springs with retainers; keepers; valve stem seals; valves

The head resting on the blue-towel covered work bench

Blob of grease on my non-dominant hand for lubing valve stem and holding the keepers

The head has been assembled (but not yet wiped off)