Thrush Aircraft S2R-R1340 Maintenance Manual page 106

Table 4-1: Engine Trouble Shooting Chart, Page 11 of 13
TROUBLE
Engine overheats
One cylinder
overheating
4-36
THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
PROBABLE CAUSE
Faulty gage transmitter or
thermocouple
Loose spark plugs
Improperly timed magneto
Improper fuel-air mixture
Air leak in induction system
Preignition
Wrong grade of fuel
Clogged or frozen oil cooler
Oil cooler air intake restricted
Oil cooler bypass temperature control
unit defective
Oil foaming
bearing malfunction
Loose spark plugs
Preignition and detonation
Excessive exhaust valve clearance
Loose intake pipe
Improperly fitted air deflectors
REMEDY
Replace faulty unit
Tighten spark plugs
Time magnetos
Adjust fuel-air mixture
Repair
Reset timing
Drain tanks and service
with correct grade
Remove, clean, repair or
replace oil cooler as
necessary
Remove restriction
Replace defective unit
Drain, flush, and replenish
oil supply.
Replace engine
Tighten spark plugs
Reset timing
Reset valve
Tighten air intake pipe
Remove and reinstall
deflectors correctly
Effective: 01/01/2008