The set 32222-1CS is for the Chevrolet V-8 application often referred to as
the 'small block V-8". The gasket, part number 20312, is extremely robust
for street use and performance applications. We have seen its successful
use in typical street engines making 300 hp and performance engines up to
700 hp. It has a special steel shim between the center cylinders to prevent
crush out and burn out common on competitor products. The gasket is white
in color and uses our patented coating process that provides excellent
sealing, motion accommodation, and clean release on disassembly. I believe
this is the best gasket available for this Chevrolet V-8 application.
The gasket will accommodate a 4.1inch bore size. Fit depends on your
cylinder chamfer, not just the bore size; always check fit. The
manufactured thickness is nominally 0.056 inches and the compressed
thickness will be about 0.052inches. Always use clean lightly lubricated
bolts with a drop of oil under the head. Follow the torque spec. Use
sealer on the appropriate bolts on this application as a few of the bolts go
into the block coolant jacket.
This gasket will seal any surface finish from very smooth (20 micro inches
roughness average, Ra) to rough at more than 100 micro inches Ra.
The range of 50-70 micro inch Ra surface finish, which looks very smooth, is ideal. We never recommend a rough surface finish for any gasket. Some machine shops are only capable of achieving a rough surface finish, and our coating system accommodates reasonably rough finishes to help our customers.
Regards,
[name removed]
Director of Technology, Sealing Products
ROL Manufacturing