Engine and Gearbox Casing Leak Repair
Oil-weeping engine and gearbox casing sealed and rebuilt with a machinable composite, no machining or housing replacement.
A job completed with Belzona. This describes what the Belzona system does and how it goes on, not a record of a specific project by this distributor.
The challenge
An engine and gearbox casing was weeping oil from a cracked housing and a worn bearing-cap bore, and the split-line face no longer sealed clean. Once a casting cracks and a bore wears, the cover cannot pull up tight and the bearing no longer seats square, so oil keeps finding its way out and the leak gets worse with running. Left alone, the seep contaminates the surroundings and threatens the bearing, and the usual fix means line-boring the housing or replacing the casting outright, both of which take the unit out of service for a long stretch.
The Belzona approach
The seep is stopped first so the cracked area and the worn bore can be cleaned down to oil-tolerant condition for a sound bond. A machinable composite that cures cold with no heat then rebuilds the crack, the worn bearing-cap bore, and the split-line face. The bore and the face are dressed back to fit so the cover pulls up tight and the bearing seats square. The result is a sealed casing back in service, with no machining of the housing and no replacement casting.
- Assess and stop the seepThe cracked housing, the worn bearing-cap bore, and the split-line face are inspected, and the active weep is stopped so the area can be worked.
- Surface preparationThe cracked area, the bore, and the split-line face are cleaned down to a sound, oil-tolerant surface so the composite bonds.
- Rebuild the casting and boreA machinable composite rebuilds the crack, the worn bearing-cap bore, and the split-line face, working cold with no welding or distortion.
- Dress back to fitThe bore and the split-line face are dressed back to fit so the cover pulls up tight and the bearing seats square.
- Reseal and return to serviceThe repair is confirmed sound and sealing, and the casing goes back ready to run.
The result
- Oil leak stopped at the cracked housing, worn bore, and split-line face
- Casting and bearing-cap bore rebuilt in place with no welding or heat distortion
- Bore and face dressed back to fit so the cover seals and the bearing seats square, with no line-boring or replacement casting
- Casing returned to service by factory-trained and factory-certified Belzona applicators
In the field
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Seeing something like this?
Belzona Houston is the authorized Belzona distributor for South Texas and the Gulf, based in Alvin, Texas, we’ll survey your equipment and recommend the right cold-applied Belzona system, with 24-hour support.