Originally Posted by higgsy91

Yeah about an hour for a straight swap but once the head is off you may as well lap the valves again. It's taken me nearly 2 hours to do a good job on lapping all the valves. Really satisfying once it's done! Go for a decent set of multi-valve compresssors. Machine Mart was where i went. http://www.machinemart.co.uk/shop/pr...ing+compressor