Service manual
EXHAUST
MANIFOLD
I
HEAT
EXCHANGER
EXHAUST
MANIFOLD
The exhaust manifold, which was disassembled from the
cylinder head, should
be
inspected before reassembly.
1.
Remove the exhaust nipples, elbows and plugs from the
manifold.
2. Examine all parts for defects, corrosion and wear and
replace as needed.
3. Flush out the manifolds interior with a liquid cleaner and
rinse thoroughly with fresh water.
4.
Use a pipe cleaner to clear the passage that connects from
the filler neck to the coolant recovery
tank
tubing.
5. Flush out the coolant recovery
tank
and its connecting tube.
CLEAR
THIS
PASSAGE
ASSEMBLY
\
REPLACE
GASKETS
1.
If
the manifold was removed as an assembly and left
intact, it can be replaced on the cylinder head in the
reverse order
of
removal.
Do not reuse the gaskets; install new ones.
a. Loosely attach the manifold elbows to the cylinder
head using new gaskets.
Do
not use any gasket sealant
on these gaskets.
b. Gradually tighten each fitting to make sure
of
proper
alignment
of
all the parts. This should be done in three
steps.
Manifold
Mounting
Bolts
Torque
12
-
17
ft-Ib
(1.6
-
2.4
m-kg)
2. Reinstall the exhaust connections. Use new gasket and
check turbo clamp condition. Replace
if
suspect..
3. Check the manifold pressure cap.
Open the valve by
pulling it and make sure it closes when released. Make
certain the upper and lower seals are in good condition.
If
any doubt, replace the cap.
CHECKING
THE
PRESSURE
CAP
RUBBER
SEALS
HEAT
EXCHANGER
The heat exchanger should be inspected and serviced during
an engine overhaul.
1. Disconnect the hoses and remove the hose fittings,
petcock, drain plugs and zinc anode. Also, remove the
end fittings and gaskets.
2. Inspect the tube (casing) for wear and dents,
if
at all
suspect replace the heat exchanger.
3. Clean out any zinc debris and pressure test the coolant
and raw water passages.
4. When reassembling, install new gaskets and O-rings.
Apply some lubricant to the new gaskets and to the
petcocks and fittings as you install them.
5. Install a new zinc anode.
NOTE:
All
of
the
above
can
be accomplished
by
sending
the
heat exchanger
to
a heat exchanger/radiator service
shop.
They will also service transmission
and
engine
oil
coolers.
6. Repaint the assembled heat exchanger with Westerbeke
heat resistant spray enamel.
7. Reconnect all hoses, replacing them as needed.
8. Refill the system with coolant as detailed above.
9. Pressure test system and check for leaks.
REPLACE
HOSES
\CLEAN
OUT
DEBRIS
HEAT
EXCHANGER
Engines & Generators
31