If it's the intake manifold, the car won't run very well - if at all. The exhaust manifold will make a loud noise and you should be able to smell the fumes under the hood. Also, it will most probably make a snapping and popping noise when you decelerate.
leaks
manifold or downpipe gaskets may be leaking gases or worse, cracked manifold
Some symptoms include: Cracked Head, blood, hurt hurt, death, super strength, no judgment.. Where on your head has it cracked?
A cracked/warped head, Blown head gasket, cracked cylinder wall, or cracked/warped intake manifold.
It must be REPLACED with another 1.
IT depends on if IT's an INTAKE or EXHAST MANIFOLD.
if it is the intake manifold YES, exhaust manifold NO.
what is the cost of repair of Toyota 4runner exhaust manifold
Depending on the location and size of the crack, you may be able to have it welded shut or you may have to replace the manifold.
Intake manifold leaks will cause the engine to idle rough and get poor fuel economy. An exhaust manifold will have no symptoms other than the sound of the leak.
The head gasket or actual cylinder head is cracked.
Blown head gasket and/or cracked head.