Detroit Diesel — Pressure Check Oil Cooler Core
Testing & diagnosis · Power take-off oil cooler / marine gear oil cooler
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Be sure personnel are adequately protected against any stream of pressurized water from a leak or rupture of a fitting, hose or the oil cooler core
Procedure
- Install a 1" pipe plug in one core opening; in the other install reducing bushings and a suitable air hose adaptor.
- Attach an air hose and apply approximately 75-150 psi (517-1034 kPa) air pressure and submerge the core and plate assembly in water heated to 180°F (82°C).
- Any leaks will be indicated by air bubbles in the water; if leaks are indicated, replace the core.
- After the pressure check, remove the adaptor and air hose and dry the core with compressed air.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- approximately 75-150 psi (517-1034 kPa)
- water heated to 180°F (82°C)
Source: Detroit Diesel 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.