Mercury F8RZ-6507-BA Valve - Inlet

You can Select Your Vehicle to check if F8RZ-6507-BA fits your vehicle.

Keeping a record will be helpful for future adjustments, and the required buckets can be purchased in advance once the clearances and existing bucket thicknesses are known.

1. Inspect the head very carefully for cracks, evidence of coolant leakage, and other damage. If cracks are found, a new cylinder head should be obtained. 2. If warpage of the cylinder head gasket surface is suspected, use a straight-edge to check it for distortion. If feeler gauges are used, the degree of distortion can be assessed more accurately. 3. Examine the valve seats in each of the combustion chambers. If they are severely pitted, cracked, or burned, they will need to be replaced or re-cut by an engine overhaul specialist. 4. If the valve guides are worn, indicated by a side-to-side motion of the valve, new guides must be installed. 5. The replacement of valve guides is best carried out by an engine overhaul specialist. 6. If the valve seats are to be re-cut, this must be done only after the guides have been replaced.

While checking the valve clearances is an easy operation, changing the shims requires the use of a manufacturer's special tool. Owners may prefer to have this work carried out by a dealer.

Any measured valve clearances that do not fall in the specified range must be adjusted.