Toyota Supra 1990 Manual page 22

MA-6 MAINTENANCE - Maintenance Operations
,> . . . . . . . .
"
CH0744 CH0004
~
Nippondenso
Borroughs
EC0003 EC0004 EC0001
CORRECT WRONG
WRONG
CHOOB6
MAINTENANCE OPERATIONS
ENGINE
Cold Engine Operations
1. REPLACE TIMING BELT
2.
(a) Remove the timing belt.
(See pages EM-22 to 25)
(b) Install the timing belt.
(See pages EM-28 to 31)
INSPECT DRIVE BELTS
(a) Visually check the belt for excessive wear, frayed
cords etc.
If necessary, replace the drive belt.
HINT: Cracks on the rib side of a belt are considered ac-
ceptable. If the belt has chunks missing from the ribs, it
should be replaced.
(b) Using a belt tension gauge, check the drive belt
tension.
Belt tension gauge:
Nippondenso BTG-20 (95506-00020)
Borroughs No. BT-33-73F
Drive belt tension:
Alternator Used belt
New belt
PS
pump
Used belt
New belt
AIC
Used belt
New belt
115
±
20lb
175
±
Sib
100
±
20
Ib
160
±
20
Ib
105
±
10
Ib
160
±
20
Ib
If necessary, adjust the drive belt tension.
HINT:
• "New belt" refers to a belt which has been used less
than 5 minutes on a running engine.
• "Used belt" refers to a belt which has been used on a
running engine for 5 minutes or more.
• After replacing the drive belt, check that it fits properly
in the ribbed grooves, especially in the places difficult
to see.
• After installing a new belt, run the engine for approx.
5 minutes and then recheck the tension.