Accessory and External Parts

M-Block 351M/400 Parts Reference

Accessory and External Parts

Copyright © 2002-2003 Dave Resch
All rights reserved.

Letter of permission on hand, thank you Dave Resch  ~BlizzND

 


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
  • Bell housing, flywheel, and clutch parts

 

 

Check out this section if you are not familiar with Ford part numbers and ID codes.

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.

Description Part Number ID Code Notes
Water pump D6AZ-8501-A OEM repl. All 351M/400.
Fuel pump D7SZ-9350-C All ’71-’79 351M/400 car, ’77 351M/400 truck.
Fuel pump D8TZ-9350-B ’78-’81 351M/400 truck.
Fuel pump E1TZ-9350-H ’81-up 351M/400 truck.
Harmonic balancer D2AZ-6316-C D2AE-C OEM repl. All 400. (obsolete 08/23/00)
Harmonic balancer D5AZ-6316-A D5AE-A
D5AE-AA
OEM repl. All 351M.
Harmonic balancer D7TE-6316-A D7TE-A
D7TE-AA
Original 400 truck part. (obsolete 03/18/99)
Harmonic balancer D7TE-6316-B D7TE-B
D7TE-BA
Original 351M truck part. (obsolete 03/18/99)
The following table lists M-block engine front dress part numbers.
Description Part Number ID Code Notes
Front cover plate D6AZ-6B070-A OEM repl. All ’71-’82 351M/400.
Thermostat housing D7AE-8592-B All ’77-’79 351M/400.
Thermostat housing EOTE-8592-C All ’80-up 351M/400 truck.
Fan clutch E1TZ-8A616-B OEM repl. All ’77-’82 351M/400 truck.

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.

Description Part Number ID Code Notes
Oil pan D0AZ-6675-A Front sump. All ’71-’79 351M/400 car.
(obsolete 08/23/00)
Oil pan D7TZ-6675-A Front sump. All ’77-’79 351M/400 RWD truck.
(obsolete)
Oil pan D7TZ-6675-B Rear sump. All ’77-’79 351M/400 4WD truck.
(obsolete 03/18/99)
Oil pan EOTZ-6675-C Rear sump. All ’80-up 351M/400 truck.
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.
Description Part Number ID Code Notes
Dipstick D5AZ-6750-B D5AE All ’71-’79 car and ’77-’79 4×2 truck /w front sump.
Dipstick tube D1AZ-6754-A All ’71-’79 car and ’77-’79 4×2 truck /w front sump.
Dipstick E2UZ-6750-A E2UE All ’77-’79 4×4 truck and ’80-up truck /w rear sump.
Dipstick tube E1TZ-6754-C All ’77-’79 4×4 truck and ’80-up truck /w rear sump.
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.
Description Part Number ID Code Notes
Valve cover D0AE-6582-A All 351C, 351M/400. “Power by Ford” logo.
Valve cover D5AE-6582-A All 351C, 351M/400. Later Ford oval style.

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.

Description Part Number ID Code Notes
Engine mount, left E1TZ-6038-B All 351M/400.
Engine mount, right E1TZ-6038-A All 351M/400.
The following table lists service part numbers for transmission mounts used in M-block truck applications.
Description Part Number ID Code Notes
Transmission mount C5TZ-6068-A All ’77-’79 351M/400 truck, RWD manual trans.
Transmission mount D3TZ-6068-C All ’77-’79 351M/400 truck, part-time 4WD, RWD, automatic trans.
Transmission mount D7TZ-6068-A All ’77-’79 351M/400 truck, full-time 4WD.
Transmission mount EOTZ-6068-A All ’80-up 351M/400 truck, manual trans.
Transmission mount EOTZ-6068-B All ’80-up 351M/400 truck, automatic trans.

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.

Description Part Number ID Code Notes
Bell housing D1AE-7976-A ’71-’78 351M/400 car, FMX auto trans, BB bolt pattern.
Bell housing D5OP-7976-BA ’75-’76 351M/400, C4 auto trans, BB pattern.
Bell housing D7TE-7976-A All ’77-’82 351M/400 truck, manual trans.

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.

Description Part Number ID Code Notes
Flywheel D7TE-6375-A D7TE All ’77-’82 351M truck, 11″ clutch.
(obsolete)
Flywheel D7TE-6375-B D7TE All ’77-’82 400 truck, 12″ clutch.
(obsolete)
Flywheel E5TZ-6375-H D7TE Current service part. All 351M/400 truck.
Flywheel ring gear D7TZ-6384-A Current service part. All 351M/400 truck.
Flexplate D1AZ-6375-A Current service part. All ’71-’82 400 and ’75-’82 351M.

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.

Description Part Number ID Code Notes
Clutch disk E1TZ-7550-A All ’77-’82 351M truck, 11″ disk.
Clutch disk D7TZ-7550-B All ’77-’78 400 truck, 12″ disk.
Clutch disk D9TZ-7550-A All ’79-up 400 truck, 12″ disk.
Clutch pressure plate EOTZ-7563-B All ’77-’82 351M truck.
Clutch pressure plate D7TZ-7563-B All ’77-’78 400 truck.
Clutch pressure plate D9TZ-7563-A All ’79 400 truck.
Clutch pressure plate EOTZ-7563-A All ’80-up 400 truck.
Clutch release fork DOTZ-7515-A All ’77-’82 351M truck, ’77-’79 400 truck, up to ’79 VIN. #DG0 000.
Clutch release fork EOTZ-7515-B All ’79-up 400 truck, starting w/ ’79 VIN #DG0 001.

Parts Home

M-Block Home

Leave a Reply