If he was unlucky enough to overheat and crack the block yeah. Try a propper bleed first as said, then read and comply with the forum rules on propper English and have a stab at a decently worded post like a good chap won't you Dav?
Good luck though, hope its just an airlock.
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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars