Mallory Ignition Mallory ENGINE MODIFICATIONS FOR O-RING DISTRIBUTORS - Manual

1
ENGINE MODIFICATIONS FOR
O-RING DISTRIBUTORS
INSTALLATION INSTRUCTIONS
FORM 1361 (REV. B) 02/03
GENERAL INFORMATION
Some distributors for Chevrolet engines have two
o-ring grooves on the lower shank. These distributors
require the engine block’s distributor hole and oil
gallery holes chamfered approximately 0.060” x 30°.
This is to remove the sharp (cutting) edges of the
distributor hole and oil gallery holes.
DO NOT USE O-RINGS IF THE ENGINE
IS NOT MODIFIED.
The o-rings will be damaged during the installation of
the distributor and debris from the o-rings will fall into
the crankcase or lodge in the oil gallery. If the engine
is not modified install the distributor without o-rings.
ENGINE BLOCK DISTRIBUTOR
HOLE
OIL GALLEY OIL GALLEY
CHAMFER, 3 PLACES APPROX. 0.060" X
OIL GALLEY OIL GALLEY
INTAKE MANIFOLD INTAKE MANIFOLD
DISTRIBUTOR
ENGINE BLOCK
NITRILE O-RINGS, 2 PLACES
ID: 1.114 ± 0.010
THICKNESS: 0.070 ± 0.003
MALLORY IS A DIVISION OF THE MR. GASKET PERFORMANCE GROUP
10601 MEMPHIS AVE. #12, CLEVELAND, OH 44144
216.688.8300
FAX 216.688.8306
www.mrgasket.com
FORM 1361
(REV. B) 02/03
Made in U.S.A.
Printed in U.S.A.