Piper Comanche PA-24 Service Manual page 513

PIPER COMANCHE SERVICE MANUAL
Trouble
HiBb oil lemperature.
Excessive oil con-
sumpaon.
I naccurate pressure
readings.
Overpnming.
TABLE VIIA-ID. TllOUBLESHOOTlNG otAJtT
(ENGINE) (CAJUlURErOR)
(coin)
c.ue
lnsufficicllt air eoolins.
lnsufficienl oil supply.
Clogcci oillillcs or
screens.
FaiIinJ or failed bearing.
Defec:tiv1: thmnosua.
Defective lemperature
~.
E "" ... i ... blow-by.
Improper engine operation.
F aiIinJ or failed
bearinB.
Worn or broken piston rill!'.
I ncorrcct instaJ.lation of
pislon rings.
E",emal oilleal<age.
Leakage through engine
fuel pump ...al.
Engine breather or vacuum
pump breather.
Cold weather
Cold weather.
2 Ell
Remedy
Check air iDlet and
oudet defonnation or
-
obsauctioll.
F ill oil sump
10
proper
level.
Remove
and c1eU1
oil
ICrCCDS.
ElWI1inc sump for metal
puticIes and.
if
found.
overhaul engine.
Replac:c.
Replace gage.
Usually caused by weak or
stuck
rings.
Overhaul.
Check enltre """"e.
Check sump for
mew
p.r.
tic:l .. and. if found.
overhaul of engine is
indicated.
Insull new ring •.
I nsuII new ring •.
Check engine cuefuUy for
leakins gasket •• "0"
ring. or sand hole •.
Replace fuel pump "0"
ring.
Check engine and overhaul
or replace pump.
In exaemcly cold wea.ther
ot! pressure readings up
[0
100 pounds do not
ncccssaJ"1iy indicate
malfunctioning.
Open throttle and unload
engine.
POWER PLANT
ISSUED: a/1am