Detroit Diesel — Remove Intercooler(s)
Repair & overhaul
From a Detroit Diesel service manual — check it applies to your exact model before use.
Procedure
- Drain the engine cooling system and each intercooler at the draincock at the outlet connector.
- Disconnect each turbocharger air inlet tube at the air shutdown housing. Remove and discard the steel straps from all 12V-149 and 16V-149 turbocharged-intercooled high efficiency engines.
- Disconnect the water hoses at the inlet and outlet connectors from each intercooler.
- Disconnect each shutdown solenoid from the shutdown linkage. Disconnect and remove the shutdown linkage from the shutdown housing.
- Remove the air shutdown housing and the air inlet housing adaptor.
- Remove six 7/16-14 x 1 3/4 in bolts, lock washers and washers from each intercooler on 12V-149 engines or eight bolts on 8V-149 and 16V-149 engines. Remove the intercoolers and seal rings; discard the
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.