Maintenance Manual

MA-14
ENGINE MAINTENANCE (VQ35DE ENGINE)
Revision; 2004 April 2003 FX
ENGINE MAINTENANCE (VQ35DE ENGINE) PFP:10001
Checking Drive Belts ALS000H0
WARNING:
Be sure to perform when the engine is stopped.
1. Inspect belts for cracks, fraying, wear and oil. If necessary,
replace.
2. Inspect drive belt deflection or tension at a point on the belt mid-
way between pulleys.
● Inspection should be done only when engine is cold, or over
30 minutes after engine is stopped.
● Measure belt tension with belt tension gauge (Commercial
Service Tool: BT3373-F or equivalent) at points marked
shown in the figure.
● When measuring deflection, apply 98 N (10 kg, 22 lb) at the
marked point.
● Adjust if belt deflection exceeds the limit or if belt tension is not within specifications.
CAUTION:
● When checking belt deflection or tension immediately after installation, first adjust it to the
specified value. Then, after turning the crankshaft two turns or more, re-adjust to the speci-
fied value to avoid variation in deflection between pulleys.
● Tighten idler pulley lock nut by hand and measure deflection or tension without looseness.
Belt Deflection and Tension
*: If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on the belt.
Tension Adjustment ALS000H1
CAUTION:
● When belt is replaced with a new one, adjust it to value for “New belt” to accommodate for insuffi-
cient adaptability with pulley grooves.
● When deflection or tension of belt being used exceeds “Limit”, adjust it to value for “After adjust-
ment of used belt”.
● When checking belt deflection or tension immediately after installation, first adjust it to the speci-
fied value. Then, after turning the crankshaft two turns or more, re-adjust to the specified value to
avoid variation in deflection between pulleys.
● When installing belt, make sure that it is correctly engaged with pulley grooves.
● Keep oil and water away from belt and pulley grooves.
● Do not twist or bend belt excessively.
KBIA1731J
Items
Deflection adjustment Unit: mm (in) Tension adjustment* Unit: N (kg, lb)
Used belt
New belt
Used belt
New belt
Limit After adjustment Limit After adjustment
Alternator and
power steering
oil pump belt
7 (0.28)
4 - 5
(0.16 - 0.20)
3.5 - 4.5
(0.138 - 0.177)
294 (30, 66)
730 - 818
(74.5 - 83.5,
164 - 184)
838 - 926
(85.5 - 94.5,
188 - 208)
Air conditioner
compressor belt
12 (0.47)
9 - 10
(0.35 - 0.39)
8 - 9
(0.31 - 0.35)
196 (20, 44)
348 - 436
(35.5 - 44.5,
78 - 98)
470 - 559
(48 - 57,
106 - 126)
Applied pushing
force
98 N (10 kg, 22 lb) —
Portion Belt tightening method for adjustment
Alternator and power steering oil pump belt Adjusting bolt on idler pulley
Air conditioner compressor belt Adjusting bolt on idler pulley