Owner manual

GENERAL INFORMATION
Mr. Gasket high-performance thermostats are designed
to resist large variations in coolant pressures that can
occur at high RPMs. Under these conditions, coolant
temperature and pressure fight for control of the thermo-
stat, keeping it from opening at its designed tempera-
ture. These high-performance thermostats open at the
right temperature regardless of engine RPM.
INSTALLATION PROCEDURE
Step 1
Drain the cooling system.
Step 2
Remove the thermostat housing, thermostat and gasket.
Step 3
Clean gasket mounting surfaces thoroughly.
Step 4
Insert the thermostat into recessed groove of intake man-
ifold. NOTE: Insert with cone end towards radiator.
Step 5
Install new gasket. NOTE: Gasket sealer is recom-
mended to prevent coolant leakage.
Step 6
Re-install thermostat housing and tighten mounting
bolts.
Step 7
Fill the cooling system to proper level and start the en-
gine, leaving the pressure cap off. Once the engine has
reached normal operating temperature, re-check coolant
level. NOTE: Check all connections for coolant leaks.
QUESTIONS
Please call our Tech Support line at 1-216-688-8300,
M – F, 9 – 5 EST. Please have the part number on hand
when you call.
INSTALLATION INSTRUCTIONS
THERMOSTATS – Mr. Gasket Part No. 4363, 4364, 4365, 4366 & 4367
FORM THERM2012
READ ALL INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION. MAKE SURE ENGINE, RADIATOR
AND COOLANT ARE COOL BEFORE STARTING
MR. GASKET IS A TRADEMARK OF PRESTOLITE PERFORMANCE
10601 Memphis Ave. #12, Cleveland, OH 44144
216.688.8300 FAX [phone]
FORM THERM2012
06/12
Printed in U.S.A.