Give each cylinder head bolt a proper bearing surface during your head job with the Pioneer Automotive Industries Engine Cylinder Head Bolt Washer Set, part number S-1018 (also cataloged as S1018). It is a direct-fit replacement for the listed applications, including the 1975-1996 Ford F-150 (L6-4.9L, V8-5.0L), 1976-1997 Buick LeSabre (V6-3.8L), 1985-1996 Chevrolet Astro (V6-4.3L), 1988-1997 Chevrolet C1500 (V8-5.0L, V8-5.7L) and 1992-1993 AM General Hummer (V8-6.2L).
Head bolt washers sit between the head of each cylinder head bolt and the cylinder head. They give the bolt a bearing surface and are designed to help spread its clamping load as the bolts are tightened to specification.
Signs these washers may need replacing include washers that are missing, cracked or distorted when the cylinder heads come off. If you are removing the heads for a head gasket or valve job, this set supplies replacement washers for the head bolts. Consult the vehicle service information for the correct head bolts, the torque sequence, and whether the original bolts may be reused.
See the Buyer's Guide tab for the full list of applications and engine codes.
What does the Pioneer S-1018 washer set do?
These washers sit under the cylinder head bolt heads. They give each bolt a bearing surface and help spread its clamping load against the cylinder head as the bolts are tightened.
Will the S-1018 fit my vehicle?
It is listed for more than 1,000 applications, such as the 1988-1997 Chevrolet C1500 with the V8-5.7L and the 1975-1996 Ford F-150 with the L6-4.9L. See the Buyer's Guide tab for your year, model and engine.
How many sets do I need?
The listed applications call for one set per application.
Can I reuse my original cylinder head bolts?
Check the vehicle service information first. Some head bolts are torque-to-yield and single-use, so follow the procedure for the correct bolts, the torque values and the tightening sequence.
When should I replace the head bolt washers?
Consider replacing them if the cylinder heads are coming off for a head gasket or valve job, or if the existing washers are missing, cracked or distorted.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
