FORM 97143130 05/05
MLS HEAD GASKET
INSTALLATION INSTRUCTIONS
When removing head gasket from package, check between the steel gasket layers to be sure no foreign material or
debris has worked its way into or between the gasket layers, this will prevent the head gasket from sealing properly.
One of the most important requirements of building an engine is to keep everything as clean as possible. This
applies to gaskets and gasket mating surfaces. Every surface a gasket comes in contact with must be free of dirt,
water, oil, grease, gasket sealer and rust.
IMPORTANT: THE GASKET MATING SURFACE BETWEEN ENGINE BLOCK DECK AND
CYLINDER HEAD MUST BE A SMOOTH 10-30 RA (AVERAGE ROUGHNESS) SURFACE.
DO NOT USE ANY TYPE OF GLUE OR SEALER ON MR.GASKET MLS HEAD GASKETS.
A SPECIAL HIGH TEMPERATURE COATING USED ON THE OUTER LAYERS OF THE
GASKET IS SUFFIECIENT TO PROPERLY SEAL GASKET.
HEAD GASKET INSTALLATION TIPS
1. Before installing MLS head gaskets, check hardware thoroughly for nicks and damaged threads, this can effect
seal of gasket and fastener clamp-load. If hardware is inadequate or damaged, gasket failure may occur under
extreme engine stress. Check all mounting bolt holes, run the correct tap through mounting bolt holes to chase
threads and remove debris.
2. Check dowel pins or rings as they register the gasket and head into the proper location. Replace worn or
damaged dowels.
3. Place a straight edge across cylinder head and engine block deck gasket surface. Flatness should not vary more
than .0025”, if a variance of more than .0025” is measured, correct this problem before installing head gasket or
failure can occur.
4. Check the rivet location to be sure rivet does not interfere with the sealing surface on engine block and cylinder
head. If rivet needs to be removed, use side cutters and remove rivet only.
5. Install gasket, check cylinder bore and mounting bolt holes for proper alignment. The gasket should not fall into
the bore or lay on the chamfer in any area, if this occurs the gasket is not aligned properly, gasket failure will occur
and cause severe engine damage.
6. Attaining the correct fastener clamp-load is one of the most important steps to achieve proper gasket seal. Use
Mr. Gasket head bolt washers #87 (7/16” ID) or #87A (1/2” ID) to reduce friction and increase fastener torque
accuracy.
7. Use thread sealant on head bolt/stud holes that enter cooling passages.
8. Follow the factory recommended fastener torque sequence. Tighten in at least three steps. Move torque wrench in
a smooth easy motion.
9. No re-torque of head bolts or studs is necessary.
MR. GASKET PERFORMANCE GROUP
10601 MEMPHIS AVE #12, CLEVELAND, OH 44144
216.688.8300 FAX 216.688.8306
MR. GASKET www.mrgasket.com
FORM 97143130
05/05
Made in U.S.A.
Printed in U.S.A.
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