Volkswagen Beetle 1972 Maintenance And Repair Manual page 74

PIPE
h. Apply penetrating oil to the four
10 mm bolts attaching the intake
manifold preheat pipes to the muf¬
fler adapters (Right and left
sides) Allow oil to penetrate for
a few minutes Remove bolts
when free.
i. Apply penetrating oil to the four
13 mm nuts holding the muffler
flange to the cylinder head (Both
sides ) Remove the nuts when
they are free
NOTE
Removing the lower nut on the
right side frees the carburetor
pre heating adapter
j. Using the flat blade screwdriver
loosen warm air channel clamps
on each side
k. Using the 10 mm wrenches, re¬
move the heat exchanger clamps
on both sides
l. Lift muffler away Remove gas¬
kets from cylinder head flanges
and pre heat adapters
3. Inspection
a Check muffler for holes caused by
corrosion or damage
b Check that round sealing surfaces
are free of damage
65