Engine Rebuild Torque Specifications

2003-2009 Isuzu Ascender 4.2L I6

Labor Time:25 hours

Torque Values (23 specifications)

Component	Nm	lb-ft	Notes
⚠️ Balance Shaft Bolts	25	18	—
⚠️ Camshaft Bearing Cap Bolts	14	10	Tighten in sequence, 3 passes
⚠️ Camshaft Cap Bolts	14	10	Tighten in sequence from center outward, multiple passes
⚠️ Connecting Rod Bolts	45	33	TTY - critical torque plus angle
Cover Bolts	16	12	—
⚠️ Crankshaft Pulley Bolt	180	133	Often TTY - check spec, may require impact
⚠️ Cylinder Head Bolts	65	48	TTY - tighten in sequence plus angle
⚠️ Exhaust Manifold Nuts	30	22	Apply anti-seize, work hot-to-cold
⚠️ Flywheel Bolts	95	70	Often TTY, tighten in star pattern
⚠️ Gasket Bolts	20	15	—
⚠️ Intake Manifold Bolts	25	18	—
⚠️ Main Bearing Cap Bolts	75	55	TTY - tighten in sequence plus angle
Mounting Bolts	27	20	—
⚠️ Mounting Bolts	47	35	—
⚠️ Oil Drain Plug	35	26	Use new crush washer
⚠️ Oil Pan Bolts	12	9	Tighten in sequence
⚠️ Oil Pump Bolts	12	9	—
⚠️ Oil Pump Pickup Tube	12	9	—
Sensor Bolts	11	8	—
⚠️ Timing Chain Guide Bolts	12	9	Replace if worn
⚠️ Timing Chain Tensioner Bolt	25	18	Install with pin/clip to compress
⚠️ Timing Cover Bolts - 8mm	25	18	Tighten in sequence
Valve Cover Bolts	10	7	Tighten in sequence

The primary torque specification for engine rebuild on a 2003-2009 Isuzu Ascender is 25 Nm (18 lb-ft).

There are 23 torque specifications for engine rebuild on the 2003-2009 Isuzu Ascender 4.2L I6, covering all related fasteners and components.