Westerbeke 6.5 MCG - EXHAUST MANIFOLD; HEAT EXCHANGER; EXHAUST MANIFOLD; HEAT EXCHANGER

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 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
temperat:ufe 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; Clean the exterior and interior
manifold. If the manifold can be reused, repaint with
WES'IERBEKE 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 ofremoval. Install a new gasket.
MANIFOLD MOUNTING BOLTS TORQUE 12 ·171t·lb {16 • 23 Nm)
2. Attach the ho.se connections to the manifold and the
exhaust elbow. Once the engine has been re-installed and ·
running, carefully check these assemblies and hose TEST PORT
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 0-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 enam~l
35
INSPECT HOSES. /
REPLACE IF SOFT
OR WORN ON THE /
ENDS-
HEAT EXCHANGER ASSEMBLY
Reinstall the heat exchanger. Tighten down the holdown
brackets and once the engine is running, check the heat
exchanger and hose connections for leaks.