Exhaust Manifold/Heat Exchanger - Westerbeke BCGB Service Manual

EXHAUST MANIFOLD
I
HEAT EXCHANGER
EXHAUST MANIFOLD
The exhaust manifold, which was disassembled from the
cylinder head, should be inspected before reassembly.
INSTALL NEW GASKETS
MANIFOLD ASSEMBLY
1. Remove the exhaust elbow from the manifold. Scrape off
and discard the old gasket. Inspect the exhaust elbow for
corrosion and damage, replace if necessary.
2. If the exhaust elbow passes inspection, remove the high
temperature sensor and clean and re-paint the elbow with
WES1ERBEKE heat resistant enamel.
3. Carefully inspect the exhaust manifold, remove the hose
connections noting the location of each for proper
alignment at reassembly. Oean the exterior and interior
manifold. If the manifold can be reused, repaint with
WES1ERBEKE heat resistant enamel.
ASSEMBLY
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 rem<?val. Install a new gasket.
MANIFOLD MOUNTING BOLTS TORQUE 12 -17 ft-Ib (16 - 23 Nm)
2. Attach the hose connections to the manifold and the
exhaust elbow. Once the engine has been re-installed and
running, carefully check these assemblies and hose
connections for leaks.
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 a-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
WES1ERBEKE heat resistant spray
INSPECT HOSES
HEAT EXCHANGER ASSEMBLY
HEAT EXCHANGER
ASSEMBLY
SERVICE 80TH ENDS
REPLACE GASKET
Reinstall the heat exchanger. Tighten down the holdown
brackets and once the engine is running, check the heat
exchanger and hose connections for leaks.
Engines & Generators
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