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M-Block 351M/400
Parts Reference
Accessory and
External Parts
Copyright © 2002-2003 Dave Resch
All rights reserved.
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This section lists Ford part numbers and ID codes for the
following
accessory and external parts of M-block (351M/400) engines:
-
Engine accessories (and front dress components).
-
Tin parts (oil pan, valve covers, and air cleaner housings)
-
Engine and transmission mounts
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Bell housing, flywheel, and clutch parts
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Check out
this section
if you are not familiar with Ford part numbers and ID codes.
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Engine accessories
Engine accessories refers to external components driven by the
engine, such as the fuel pump, water pump, smog pump
(Thermactor),
and alternator.
The term “front dress” refers to various other
parts attached to the front of the engine, such as the harmonic
balancer, front cover plate, thermostat housing, etc.
The following table lists M-block engine accessory part
numbers.
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Description
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Part Number
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ID Code
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Notes
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Water pump
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D6AZ-8501-A
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—
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OEM repl. All 351M/400.
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Fuel pump
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D7SZ-9350-C
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—
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All '71-'79 351M/400 car, '77 351M/400 truck.
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Fuel pump
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D8TZ-9350-B
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—
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'78-'81 351M/400 truck.
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Fuel pump
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E1TZ-9350-H
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—
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'81-up 351M/400 truck.
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Harmonic balancer
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D2AZ-6316-C
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D2AE-C
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OEM repl. All 400. (obsolete 08/23/00)
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Harmonic balancer
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D5AZ-6316-A
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D5AE-A
D5AE-AA
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OEM repl. All 351M.
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Harmonic balancer
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D7TE-6316-A
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D7TE-A
D7TE-AA
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Original 400 truck part. (obsolete 03/18/99)
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Harmonic balancer
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D7TE-6316-B
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D7TE-B
D7TE-BA
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Original 351M truck part. (obsolete 03/18/99)
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The following table lists M-block engine front dress part
numbers.
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Description
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Part Number
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ID Code
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Notes
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Front cover plate
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D6AZ-6B070-A
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—
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OEM repl. All '71-'82 351M/400.
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Thermostat housing
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D7AE-8592-B
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—
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All '77-'79 351M/400.
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Thermostat housing
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EOTE-8592-C
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—
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All '80-up 351M/400 truck.
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Fan clutch
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E1TZ-8A616-B
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—
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OEM repl. All '77-'82 351M/400 truck.
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Tin parts
The term “tin parts” refers to external engine components made
of
thin-gauge stamped steel, that is, oil pans and valve covers.
The following table lists service part numbers for M-block oil
pans.
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Description
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Part Number
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ID Code
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Notes
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Oil pan
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D0AZ-6675-A
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—
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Front sump. All '71-'79 351M/400 car.
(obsolete 08/23/00)
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Oil pan
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D7TZ-6675-A
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—
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Front sump. All '77-'79 351M/400 RWD truck.
(obsolete)
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Oil pan
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D7TZ-6675-B
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—
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Rear sump. All '77-'79 351M/400 4WD truck.
(obsolete 03/18/99)
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Oil pan
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EOTZ-6675-C
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—
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Rear sump. All '80-up 351M/400 truck.
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M-block engines used two different dipstick/tube designs — one
for
front sump oil pans and one for rear sump oil pans.
The following table lists service part numbers for M-block
dipsticks
and dipstick tubes.
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Description
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Part Number
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ID Code
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Notes
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Dipstick
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D5AZ-6750-B
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D5AE
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All '71-'79 car and '77-'79 4x2 truck /w front sump.
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Dipstick tube
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D1AZ-6754-A
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—
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All '71-'79 car and '77-'79 4x2 truck /w front sump.
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Dipstick
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E2UZ-6750-A
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E2UE
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All '77-'79 4x4 truck and '80-up truck /w rear sump.
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Dipstick tube
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E1TZ-6754-C
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—
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All '77-'79 4x4 truck and '80-up truck /w rear sump.
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All 335-series engines use the same 8-bolt valve cover design.
Early 400s ('71-'74) used the same painted steel valve cover as
351C 2V and most 351C 4V engines. The early style covers have
the
“Power by Ford” logo stamped in the top.
When Ford introduced the 351M in the 1975 model year, the
M-block
painted steel valve cover was re-styled with the Ford oval
design
stamped in the top. The later style valve cover was used on all
351M/400 applications until M-block production ended in 1982.
The following table lists part numbers for M-block valve
covers.
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Description
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Part Number
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ID Code
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Notes
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Valve cover
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D0AE-6582-A
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—
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All 351C, 351M/400. “Power by Ford” logo.
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Valve cover
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D5AE-6582-A
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—
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All 351C, 351M/400. Later Ford oval style.
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Engine and transmission mounts
The M-block engine mount’s functional design (i.e., attachment
to
the block and frame brackets) never changed from the original
400
design in 1971, but there were various improvements in
materials
and engineering details over the years.
The following table lists service part numbers for M-block
engine
mounts. These mounts can be used on any car or truck 351M/400
application.
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Description
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Part Number
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ID Code
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Notes
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Engine mount, left
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E1TZ-6038-B
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—
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All 351M/400.
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Engine mount, right
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E1TZ-6038-A
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—
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All 351M/400.
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The following table lists service part numbers for transmission
mounts used in M-block truck applications.
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Description
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Part Number
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ID Code
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Notes
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Transmission mount
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C5TZ-6068-A
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—
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All '77-'79 351M/400 truck, RWD manual trans.
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Transmission mount
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D3TZ-6068-C
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—
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All '77-'79 351M/400 truck, part-time 4WD, RWD, automatic
trans.
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Transmission mount
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D7TZ-6068-A
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—
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All '77-'79 351M/400 truck, full-time 4WD.
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Transmission mount
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EOTZ-6068-A
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—
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All '80-up 351M/400 truck, manual trans.
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Transmission mount
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EOTZ-6068-B
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—
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All '80-up 351M/400 truck, automatic trans.
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Bell housings
There were three bell housings specific to the M-block
(351M/400) engines.
The following table lists part numbers for M-block bell
housings.
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Description
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Part Number
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ID Code
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Notes
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Bell housing
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D1AE-7976-A
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—
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'71-'78 351M/400 car, FMX auto trans, BB bolt pattern.
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Bell housing
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D5OP-7976-BA
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—
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'75-'76 351M/400, C4 auto trans, BB pattern.
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Bell housing
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D7TE-7976-A
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—
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All '77-'82 351M/400 truck, manual trans.
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Flywheels and flexplates
All M-block (351M and 400) engines used in cars were equipped
with
automatic transmissions. The only M-blocks equipped with manual
transmissions were the truck engines used in F-series pickups
and
Broncos, starting in the 1977 model year. Therefore, all
M-block
flywheels are truck parts.
When the M-block was introduced in trucks, the 351M and 400 had
different flywheel parts to accommodate different sized clutch
disks. The 351M was equipped with an 11" diameter clutch disk,
and
the 400 was equipped with a 12" clutch disk. Both flywheels
were
the same diameter and used the same ring gear. The only
difference
between 351M and 400 flywheels was the set of holes drilled and
tapped for the clutch pressure plate.
Note: Both 351M and 400 engines have the same 28 oz-in
crankshaft imbalance, so all M-block flywheels have the same
balancing counterweight, and they can be interchanged without
vibration or balance problems.
After M-block production ended in 1982, Ford re-engineered the
M-block flywheel to accommodate both engines with one part.
The current M-block flywheel service part (E5TZ-6375-H) has
holes drilled and tapped for both 351M and 400 pressure plates.
When the 351M was introduced in 1975, it used the same
flexplate
as the 400. When M-block engines were introduced in trucks, the
truck engines equipped with automatic transmissions used the
same
flexplate as the car engines.
The following table lists part numbers for M-block
flywheels and flexplates.
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Description
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Part Number
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ID Code
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Notes
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Flywheel
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D7TE-6375-A
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D7TE
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All '77-'82 351M truck, 11" clutch.
(obsolete)
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Flywheel
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D7TE-6375-B
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D7TE
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All '77-'82 400 truck, 12" clutch.
(obsolete)
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Flywheel
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E5TZ-6375-H
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D7TE
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Current service part. All 351M/400 truck.
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Flywheel ring gear
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D7TZ-6384-A
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—
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Current service part. All 351M/400 truck.
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Flexplate
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D1AZ-6375-A
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—
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Current service part. All '71-'82 400 and '75-'82 351M.
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Clutch parts
Since all car M-blocks used automatic transmissions, all
M-block
clutch parts are truck-specific components.
The following table lists service part numbers for M-block
clutch parts.
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Description
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Part Number
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ID Code
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Notes
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Clutch disk
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E1TZ-7550-A
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—
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All '77-'82 351M truck, 11" disk.
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Clutch disk
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D7TZ-7550-B
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—
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All '77-'78 400 truck, 12" disk.
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Clutch disk
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D9TZ-7550-A
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—
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All '79-up 400 truck, 12" disk.
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Clutch pressure plate
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EOTZ-7563-B
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—
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All '77-'82 351M truck.
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Clutch pressure plate
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D7TZ-7563-B
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—
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All '77-'78 400 truck.
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Clutch pressure plate
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D9TZ-7563-A
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—
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All '79 400 truck.
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Clutch pressure plate
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EOTZ-7563-A
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—
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All '80-up 400 truck.
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Clutch release fork
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DOTZ-7515-A
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—
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All '77-'82 351M truck,
'77-'79 400 truck, up to '79 VIN. #DG0 000.
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Clutch release fork
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EOTZ-7515-B
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—
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All '79-up 400 truck, starting w/ '79 VIN #DG0 001.
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