Buick 555457 Valve, Exhaust, .003 Oversize

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Valve resurfacing involves a sequence of activities that are different for various engine types. First, remove the cylinder head and place it on a clean, well-lit work surface. Eliminate valve seals from intake valve guides and discard them. Get rid of the valves and number them for reinstallation purposes. Make sure to cleanse all carbon deposits from combustion chambers, piston crowns and valves with a soft wire brush being careful not to rasp against valve seats or faces. Using the right spring compressor for valves, compress the valve spring until it springs off its cap keys. Free it in order to get rid of this cap. Cleaning carbon and gum deposits out of valve guide bores may be done using Reamer J-8101. The pits or damages on the valve faces as well as seat require attention therefore reface them at 45° angle if necessary. When there is excessive clearance with either 0.006 or 0.010 reamers ,ream out valve guides lightly lap valves into seats with fine grinding compound , ensuring smooth and true surfaces Test each one using Prussian blue coated on the face of each other to see who is more concentrically aligned Remove burrs from stem ends, polish stems with crocus cloth, lubricate stems and guides with clean engine oil before putting back Install new intake seals (no exhaust seal needed). Use an installer to locate these seals above guides correctly Install such springs so that tightly wound coil is located next to cylinder head (on 8-350 exhale ones you can install any end up) Pressurize springs then return caps afterwards assembling cylinder heads again Start by taking off rocker arm nuts balls arms use a compressor for removing keepers caps other relevant pieces when dealing Chevrolet engines For Pontiac motors remove rocker arms employing a compressor which removes locks caps among others in addition to this Restore Oldsmobile engines have remover key oil seals followed by their respective valves New oil seals are put over stems by means of an appropriate tool for the purpose Narrow valve seats to specified width and if necessary ream out guide bores for oversize valves when reconditioning the valves as well as valve seats This might be carbon deposits narrowing or widening a valve seat stem height and clearance etcetera assess wear, damage or any other problems from different parts. Valving conditions require scrutinizing for various components such as wear, damages, problems and others that may arise hence follow manufacturer's guidelines on servicing valves Measure correctly the height of each stem after proper placement of keys by tapping it down. Take all valves' measurements to ensure correct stem heights, replacing those ones that went too short.

New intake valve seals should be installed while avoiding exhaust valve guide seals.

It is important to scrape away all carbon from the valve head and stem, then clean the valves and valve seats using a solvent-soaked rag followed by a clean rag.

The correct valve face angle is 45°.

Finally, remove all carbon from the valve head and stem, ensuring that no grinding compound remains in the ports or valve guides, and clean the valves and seats thoroughly with solvent-soaked rags, followed by clean rags, and use an air line if available to blow everything clean.

If pitting is minimal, it can be addressed by grinding the seats and valves using coarse and then fine valve grinding paste.

Depending on their condition, the valves may need to be reground or replaced, with any valve that develops a sharp edge upon re-grinding being discarded.