Spark Plug - GAS GAS FSE 400 - 2004 Service Manual

- Visually inspect the old coolant. If whitish cotton-like wafts are
observed, aluminum parts in the cooling system are corroded. If the
coolant is brown, iron or steel parts are rusting. In either case, flush
the cooling system.
- Check the cooling system for damage, loose joints, or leaks.
- Install the water pump cover drain plug and cylinder drain plug with
the specified torques shown in the table. Always replace the gasket
with a new one, if it damaged.
Drain Plug Tightening Torque
Water Pump Cover Plug: 9 Nm. (6FT.LBS).
- Fill the radiator up to the bottom of the radiator filler neck
with coolant, and install the radiator cap.
- Check the cooling system for leaks.
- Start the engine, warm up the engine throughly, then stop the
engine.
- Check the coolant level after the engine cools down. Add
coolant up to the bottom of the radiator filler neck.

SPARK PLUG

The standard spark plug is a shown in the table, it should have a
specified gap, and be tightened to 27 N-m. (20FT.LBS).
Standard Spark Plug
NGK CR8 E 0.7-0.8 mm.
The spark plug should be taken out periodically to check its gap
and ceramic insulator. If the plug is oily or has carbon build up on
it, clean it (preferably with a (sandblaster) and then clean off any
abrasive particles. The plug may also be cleaned using a high flash-
point solvent and a wire brush or other suitable tool. Measure the
gap with a wire-type thickness gauge, and adjust the gap, if incorrect,
by bending the outer electrode. If the spark plug electrodes are
corroded or damaged, or if insulator is cracked, replace the plug.
Inspect every 30 hours. Replace every 60 hours.
To find out whether the right temperature plug is being used, pull it
out and examine the ceramic insulator around the center electrode.
If the ceramic is light brown, the spark plug is correctly matched to
engine temperature. If the ceramic is burned whit, the plug should
be replaced with the next colder plug. If the ceramic is black, the
plug should be replaced with the next hotter plug.
If the engine output decreases, replace the spark plug to regain
performance.
Spark Plug maintenance
NGK
CR7E U22ESR-N
CR8E U24ESR-N
U27ESR-N
CR9E
83
EC FSE 2004 - -
NOTE
NOTE
DENSO COMMENTS
If the standard plug looks
wet or has a dark color,
replace.
Standar
If the standard plug looks
glassy or has a white color,
replace the plug.