Work finished, Refrigerator & Muffler Fix & Replace

[Gregory OConnor]

Kurt, repairing exhaust cracks is one of those places where overbuild
can get you in trouble. the engine is rubber mounted. it shakes and
rolls with torque. the exhaust cantilivers off the engine and is
mounted more ridgid. if you dont allow or facilitate the movement,
the stress of the union will recrack the repair. The repair could also
get too strong and force a new weak point. often that weak point is
the manifold. deep sleve unions and clamps allow for twisting. there
is also the fact that when the system heats up the metal expands and
lengthens the pipes.

I dont think it is the cause of the crack in the bus but in a car or
light truck, often an exhaust crack close the manifold is a result of
a failed motormount allowing too much engine movement.

greg94pt