Cylinder Heads

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Each cylinder head is professionally inspected for cracks and pressure tested for coolant leaks, where applicable.  Furthermore, we inspect the warp and thickness of the cylinder head against OEM specifications before proceeding. 

All valve jobs performed receive 3-angle valve seat cutting utilizing carbide seat cutters.  This is particularly important for efficiency and power of air intake and exhaust.  During the valve train inspection, each valve stem and margin are checked against OEM specifications and damage.  Springs are inspected for damage and wear, and spring pressures are checked against OEM specifications.  Valve keepers are inspected for wear.  Rotocoils are inspected to assure proper rotation and for wear.  Wearable items such as valve guides, valve stem seals, cam bearings, and injector tube o-rings are replaced to ensure a life-long cylinder head.  Any components that are not within OEM usage specifications are replaced with new OEM spec components for the cylinder head.  Having the wrong valve and seat combination can cause failure and/or premature wear on valves and seats causing a shorter life for the head and the need to rebuild sooner costing you more money. This is particularly important regarding EGR, natural gas, and propane powered cylinder heads.  These heads have a harder valve and seat combination.  Upon request, cylinder heads can be rebuilt utilizing all new components. 

Every cylinder head can be resurfaced permitting it is within OEM specifications regarding the thickness of the cylinder head casting.  In some cases a valve job may be necessary to keep the valves within specifications due to the removal of material on the surface of the head.

Injector tubes and o-rings are replaced when necessary or when doing a full rebuild.  This is to ensure a good seal and provide a long lasting cylinder head.

Cam bearings are replaced on every rebuilt cylinder head and/or when requested by customers with new parts that meet or exceed OEM specifications.

Each cylinder head is inspected after machine work is performed.  Heads are pressure tested after injector cups or tubes are installed.  Valve keepers are inspected and tested to insure they are locked in place after the valve job is performed.  Vacuum is pulled on all valves to ensure a good seal.  Valve recessions are noted to make sure they are within factory guidelines.