Military MEP MEP-804A — Check engine compression
Testing & diagnosis
For the Military MEP MEP-804A, from the Military MEP service manual.
Applies to: Military MEP MEP-804A
Procedure
- Start engine and warm until coolant above 176°F (80°C).
- Shut down engine.
- Remove glow plug from No. 1 cylinder.
- Connect adapter and compression gage to glow plug hole.
- Turn engine over with starter and record reading.
- Repeat for each cylinder.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Standard 441 psi (3038 kPa) at 200 rpm and sea level; limit 327 psi (2254 kPa)
Full service-parts list: Military MEP MEP-804A →
Source: Military MEP service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.