GESSLER HEAD PORTING, Quadrajet and Buick Parts - Services - Cylinder Head Rebuilding Buick Performance Parts / Q-Jet parts

Completely disassemble and remove water jacket core plugs.
Castings are degreased and shot blasted clean.
Visual inspection and Magnaflux detection for cracks. Cracked or damaged heads are discarded.
Valve guides are bored using a positive K-Line fixture to insure concentricity to valve seat. A thin wall bronze insert is fitted and final sized using a Sunnen hone.
If needed or requested, hardened exhaust seats are installed concentric to valve guide.
A 3, 4 or 5 angle valve seat is machined on our Sunnen VGS-20, with proper diameters, angles and seat width for your application.
Valves are refaced to insure concentricity.
If applicable, valve guide bosses are machined for increased valve lift clearance, dual springs and small diameter positive valve seal.
The deck surface is milled straight and true using our CBN/PCD surfacer.
Head castings and parts are inspected and cleaned for assembly.
Each valve spring is checked for proper pressure, installed height is measured. Springs are shimmed individually to insure proper spring pressure for your camshaft requirements.
Valve guides are pre-lubricated for initial startup and quality positive valve seals installed.
New water jacket core plugs are installed.

Gessler Head Porting uses the Sunnen VGS-20 head machining center to assures proper valve seat sizes and angles.
Consistent valve seat angles, dimensions, height and concentricity.
Doesn't your car deserve the best?