Detroit Diesel — Clean Oil Cooler Core
Maintenance · 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
- Wear adequate protective clothing (face shield, rubber gloves, apron); work in the open or well ventilated room when trichloroethane or other chemicals are used
- To avoid personal injury, wear adequate protective clothing and work in a well ventilated area
Procedure
- Clean the oil side: circulate 1,1,1 trichloroethane through core passages with a force pump to remove carbon and sludge; clean before sludge hardens.
- If oil passages are badly clogged, circulate oakite or alkaline solution through core and flush thoroughly with clean hot water.
- Clean the water side: immerse core in solution of one-half pound oxalic acid per two and one-half gallons of one-third muriatic acid and two-thirds water.
- When bubbling stops (usually 30 to 60 seconds), remove core and thoroughly flush with clean hot water; then dip core in light engine oil.
Tools required
- force pump Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- one-half pound oxalic acid to each two and one-half gallons of solution (one-third muriatic acid, two-thirds water)
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.