Cummins 4BT – Cylinder Head – Cleaning

Injector Bore Brush 3822509
Clean the carbon from the injector nozzle seat.

Scrape the gasket material from all gasket surfaces.

Clean the build-up of deposits from the coolant passages.
Excessive deposits may be cleaned in an acid tank but the expansion plugs must first be removed.

Clean the cylinder head combustion deck with a Scotch-Brite® pad or an equivalent cleaning pad and diesel fuel
or solvent.

Warning: Wear protective eye covering.
Clean carbon deposits from the valve pockets with a high quality steel wire wheel installed in a drill or a die grinder.
NOTE: An inferior quality wire wheel will loose steel bristles during operation, thus causing additional contamination.

Wash the cylinder head in hot soapy water solution.
After rinsing, use compressed air to dry the cylinder head.

Warning: Wear protective eye covering.
Clean the valve heads with a soft wire wheel.
Keep the valves in a labeled rack to prevent mixing prior to making measurements.

Polish the valve stem with a Scotch-Brite® pad or equiv­alent cleaning pad and diesel fuel or solvent.