2003 Opel Astra Classic Wagon engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


All Opel gasoline straight-4 1.4 L X 14 NZ engines	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
All Opel gasoline straight-4 1.6 L X 16 SZR engines	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


Lower section of intake manifold	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Upper section of intake manifold	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt tensioner


All Opel gasoline straight-4 1.4 L X 14 NZ engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Opel gasoline straight-4 1.6 L X 16 SZR engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Opel gasoline straight-4 1.6 L X 16 XEL engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAuxiliary drive belt tensioner


All Opel gasoline straight-4 1.4 L X 14 NZ engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Opel gasoline straight-4 1.6 L X 16 SZR engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Opel gasoline straight-4 1.6 L X 16 XEL engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAir-conditioning compressor


M10	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


Air-conditioning compressor bracket	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Air-conditioning compressor pressure line	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_moreAlternator

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines


M10	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M8	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m


All Opel gasoline straight-4 1.6 L X 16 XEL engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreGenerator bracket


All Opel gasoline straight-4 1.4 L X 14 NZ engines	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
All Opel gasoline straight-4 1.6 L X 16 SZR engines	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
All Opel gasoline straight-4 1.6 L X 16 XEL engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m


Power steering pump bracket	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Servo pump pulley	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreServo steering pump

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines


On the engine block	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m


All Opel gasoline straight-4 1.6 L X 16 XEL engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCarburetion


Fuel-distributing pipe	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCooling system

expand_moreCoolant pump

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAll Opel gasoline straight-4 1.6 L X 16 SZR engines


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


All Opel gasoline straight-4 1.6 L X 16 XEL engines	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCylinder head


Camshaft bearing	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCylinder head screws

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines

Figure 1. Cylinder head, Cylinder head screws, Opel gasoline straight-4 1.4 L X 14 NZ.


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws. See figure 1.
Second stage	60°60°60°
Third stage	60°60°60°
Fourth stage	60°60°60°

expand_moreAll Opel gasoline straight-4 1.6 L X 16 SZR engines


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Use new screws. See figure 1.
Second stage	60°60°60°
Third stage	60°60°60°
Fourth stage	60°60°60°

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Use new screws. See figure 1.
Second stage	90°90°90°
Third stage	90°90°90°
Fourth stage	90°90°90°
Fifth stage	45°45°45°


Valve cover	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreEngine block

expand_moreConnecting rod bearing

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Second stage	30°30°30°

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws and nuts.
Second stage	30°30°30°

expand_moreCrankshaft central screws

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines

expand_moreM12


First stage	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Second stage	30°30°30°
Third stage	15°15°15°


Otherwise	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreAll Opel gasoline straight-4 1.6 L X 16 SZR engines

expand_moreM10


With fan belt	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreWith ribbed V-belt


First stage	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Use new screw.
Second stage	45°45°45°
Third stage	15°15°15°

expand_moreM12

expand_moreWith ribbed V-belt


First stage	70.07 lbf⋅ft70.07 lbf⋅ft95 N⋅m
Use new screw.
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


First stage	70.07 lbf⋅ft70.07 lbf⋅ft95 N⋅m
Use new screw.
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreFlywheel


First stage	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreMain bearing

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Second stage	45°45°45°
Third stage	15°15°15°

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace screws and nuts.
Second stage	45°45°45°
Third stage	15°15°15°

expand_moreEngine control

expand_moreCamshaft drive belt deflection pulley


1.6 i 16V with gasoline straight-4 1.6 L 99 HP at 5800 RPM, 135 N⋅m at 3400 RPM engine (1998.1–2005.1)	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCamshaft timing gear


All Opel gasoline straight-4 1.4 L X 14 NZ engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
All Opel gasoline straight-4 1.6 L X 16 SZR engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace screws and nuts.
Second stage	60°60°60°
Third stage	15°15°15°


Toothed belt guard	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m
Toothed belt tensioning roller	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreEngine lubrication

expand_moreOil drain plug


All Opel gasoline straight-4 1.4 L X 14 NZ engines	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
All Opel gasoline straight-4 1.6 L X 16 SZR engines	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
All Opel gasoline straight-4 1.6 L X 16 XEL engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m


Oil filter	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Oil pump	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreOil sump

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines

expand_moreAt the gearbox


M10	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


On the engine block	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m


All Opel gasoline straight-4 1.6 L X 16 SZR engines	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Clean the thread and use screw-locking compound.

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


At the gearbox	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Otherwise	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Clean the thread and use screw-locking compound.

expand_moreEngine management

expand_moreCamshaft sensor


1.6 i 16V with gasoline straight-4 1.6 L 99 HP at 5800 RPM, 135 N⋅m at 3400 RPM engine (1998.1–2005.1)	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m


Crankshaft sensor	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Knock sensor	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Lambda sensor	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreEngine mounting


Engine bracket	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Use new locking washers.

expand_moreEngine mounting

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines


At the bracket	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Use screw-locking compound.
On chassis	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Use screw-locking compound.

expand_moreAll Opel gasoline straight-4 1.6 L X 16 XEL engines


At the bracket	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
On chassis	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Use screw-locking compound.

expand_moreExhaust system

expand_moreCatalytic converter


1.6 i 16V with gasoline straight-4 1.6 L 99 HP at 5800 RPM, 135 N⋅m at 3400 RPM engine (1998.1–2005.1)	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


Exhaust manifold	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws and nuts.
Exhaust pipe	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreIgnition system


Spark plugs	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreStart system

expand_moreStarter

expand_moreAll Opel gasoline straight-4 1.4 L X 14 NZ engines


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M12	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


All Opel gasoline straight-4 1.6 L X 16 XEL engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2003 Opel Astra Classic Wagon user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and Opel warranty policy for your region. In some regions DIY service may invalidate your warranty.

Maintenance Items

Engine Fastener Tightening Specifications
Front Suspension Fastener Tightening Specifications
Rear Suspension Fastener Tightening Specifications
Transmission Fastener Tightening Specifications

Service Intervals

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Opel Astra Classic Wagon service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 2003 Opel Astra Classic Wagon you're not only saving money, but also also improving your technical skills and learning something new.

2003 Opel Astra Classic Wagon I Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Opel Astra Classic Wagon I model years

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