Cracked Cylinder Head

[magner]

what are the symptoms of a cracked cylinder head?

[Buenchico]

The first sign is often a motor mechanic rubbing his hands and smiling gleefully, while his eyes turn into cartoon-style cash register displays ;-)

Otherwise . . .
http://www.doityourself.com/stry/4-signs-of-a-cracked-cylinder-head

[gsr600]

also it may leak water into a compression chamber making it hard to turn over at start up & a misfire until water has cleared from the plug, & an extreme pressurised water system

[Hymie]

The signs and symptoms displayed by an engine with a cracked cylinder head may be indistinguishable from that of a failed head gasket. But since both require removal of the cylinder head – once the head is off, examination should identify the fault.

[neodarwinian]

Trailing a thick cloud of white smoke behind you!