Oil Pan Seal Fits Most Military HUMVEE 6.5L Diesel Engine (Later A2/Rev Models)

Oil Pan Seal Fits Most Military HUMVEE 6.5L Diesel Engine (Later A2/Rev Models)

National Stock Number (NSN): 5330-01-378-8572

Manufacturer / GM Part Number: 23502587 (or GEP23502587).  AM General Part Number: 5743235

IMPORTANT!

For the 6.2L Diesel Engine (Earliest A0/A1 Models)

If you are working on an early-generation 6.2L Humvee, the oil pan profile requires a different thickness, making this 6.5L part incompatible.

Summary Checklist for a 6.5L Fitment:

• Standard 6.5L (Naturally Aspirated & Turbo): Yes, it fits.
• 6.5L with One-Piece Rear Main Seal: Yes, it fits.
• Early 6.5L with Two-Piece Rear Main Seal: No.
• Upgraded 6.5L P400 Bedplate Engine: No

Tech Tip: Military mechanics and Technical Manuals notes mention that on later 6.5L engines, only this rear U-shaped seal is used, while the left and right flat edges of the oil pan are sealed directly with Loctite 5900 RTV sealant rather than traditional cork/rubber side gaskets to permanently stop drops and leaks.