All thermostat installation instruction are in the download file. You will find instructions on installing:

Basic thermostats

Off-set thermostats

By-pass thermostats

Thermostats with rubber seals

Thermostats for Ford 4 cyclinder engines

Thermostats that fit in Saturn water housings

Heavy Duty Weirstats

Gasket Installation instrustions are in a down load file

For Locking Fuel Caps:

For Pre-Vent (Pressure Release) Locking Fuel Caps

INSTRUCTIONS:  To Install - Rotate cap to RIGHT until cap ratchets "clicks" on filler neck 3 times.  To Remove - Insert key.  Hold cap and rotate key left ¼ turn to start pressure release. After hissing stops, rotate cap left until fully removed.  DO NOT USE KEY TO ROTATE CAP.

For Quick-on Locking Fuel Caps

INSTRUCTIONS:  To Install Cap: Rotate cap to Right until cap ratchets (clicks) on filler neck 3 times.

To Remove Cap: Insert key. Hold cap and rotate key left ¼ turn until it stops. Then rotate cap left until fully removed.

Do not use key to rotate cap.

To Remove Key: Rotate key Right ¼ turn.

For Metal Push On Locking Fuel Caps:

INSTRUCTIONS:  To Install -  With the key removed, push cap into filler neck until both lock bars engage under the filler neck cams with an audible "click:.  Do not turn cap.  To Remove -  Insert key.  Rotate key slowly 1/4 turn to retract lock bars.  Cap can now be removed from neck.