Rear Main Crankshaft Seal for Mitsubishi Chrysler Sigma 21443-33005

BRAND NEW *OEM Quality* rear main crankshaft seal for Mitsubishi Chrysler Sigma vehicles.

A worn rear main crankshaft seal lets engine oil weep past the back of the crankshaft, often showing up as a slow leak near the bell housing or a slipping clutch on manual Sigma models. Same-day dispatch before 12pm.

TO SUIT

This seal fits Mitsubishi Chrysler Sigma GE, GH, GJ,GK,GN, GN (4G52/4G54/4G51 engines) models from 1977 to 1987. See the full model and engine breakdown below for exact coverage.

FITMENT CHECK

Confirm your Sigma is fitted with the OEM number 21443-33005 before ordering, as Sigma spans several chassis codes and engine families across this production run.

OEM PART NUMBERS

• 21443-33005
• 21321-42041
• 21321-42042
• MD020240
• MD343564
• 55267742

OTHER PART NUMBERS

• Elring: 247.290
• Victor Reinz: 81-53981-00
• Permaseal: OSS0240

PACKAGE INCLUDES

1 x Rear Main Crankshaft Seal, 80mm ID x 96mm OD x 8mm.

ABOUT THIS SEAL

The rear main seal sits on the crankshaft flange at the transmission end of the Sigma engine, keeping oil inside the crankcase while the crankshaft spins freely.

On Sigma models this seal hardens with age and mileage, and once it fails oil weeps onto the clutch or torque converter, gradually dropping oil level and risking clutch slip on manual variants.

COMMON SYMPTOMS OF FAILURE

• Slowly dropping oil level with no other visible leak
• Clutch slipping or reduced bite in manual vehicles
• Burning oil smell from the transmission area
• Oil residue found on the flywheel during a clutch or transmission job
• Oil misting visible on the flexplate or flywheel on inspection