Cylinder Head Reconditioning 

HM Gem have the latest computerised cylinder head reconditioning machines available in the industry.

 

Cylinder Head Inspection

Cylinder heads and cylinder head parts are subjected to a full survey report, all sizes and tolerances are checked to the Original Equipment Manufacturers (O.E.M) specifications.

 

Cylinder head castings are non destructive magnetic particle crack tested, valve guide clearances, valve masking heights and valve margins are all checked. All parts including inlet and exhaust valves, retainers, springs and washers are check for serviceability.

 

Caterpillar 3412 Cylinder head having the valve masking height measured for serviceable tolerance

 

Cylinder Head Reconditioning

Our fully equipped cylinder head machining shops have the ability to machine cylinder heads of all shapes and sizes from small single cylinder alloy heads to the largest cast iron diesel heads seen in high speed high horsepower off higway applications.

 

Our cylinder head reconditioning service includes, valve guide fitting and reaming, valve seat insert replacment and valve seat machining, valve refacing, cylinder head milling and fire ring  recess re-machining.

 

HM Gem have Australia 's most comprehensive list of specialised tooling for injector sleeve and pre combustion chamber replacement including,

Caterpillar, Detriot GM, Fiat, Hino, International, Komatsu, Leyland, Mack, Mercedes, Mitsubishi, Perkins and Volvo. 

 

Cylinder head pressure testing, final rinsing and valve train assembly all make up part of the reconditioning process. All machining is completed to O.E.M tolerances and specifications. 

 

The Serdi S5.0 Valve guide and seat machine is laser controlled guaranteeing consentric and consistent valve seat depth machining. Example shown is a Caterpillar C15 cylinder head.

 

 

 The Rottler SG8 Valve guide & seat machine, example shown is a

Caterpillar C15 cylinder head. 

 

 

 

Valve seat cutting Scania DSC11.

 

AMC 2500VF milling a Caterpillar 3412.