If you are looking at a bunch of 1.6 heads, is there any easy way to tell the earlier 11mm heads from the later 12mm heads?
Can you put an older heads on a newer block?
I thought this would be in commonly asked questions, but can't find it. Thanks.
Can a 12mm bolt fit thru an 11mm head, can I take a bolt along, and if it fits it's newer if it doesn't it's older, or is the difference not that much?