1991 Opel Astra Sedan engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws and nuts.

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt tensioner


All other modifications	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAuxiliary drive belt tensioner


All other modifications	14.75 lbf⋅ft14.75 lbf⋅ft20 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 other modifications


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


Generator bracket	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_morePower steering pump bracket


All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


Hydraulic lines at the servo-steering pump	20.65 lbf⋅ft20.65 lbf⋅ft28 N⋅m
Servo pump pulley	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreServo steering pump


All Opel gasoline straight-4 1.4 L 14 NV engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreAll other modifications


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

expand_moreCarburetion


Fuel-distributing pipe	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Injection hoses	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Injection nozzle (injector)	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m

expand_moreInjection pump


At the bracket	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M6	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m

expand_moreInjection pump pulley


All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCharging


Turbo charger	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreCooling system

expand_moreCoolant pump

expand_moreAll Opel gasoline straight-4 1.4 L 14 NV engines


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

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


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAll other modifications


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


Coolant pump pulley	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing


All other modifications	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCylinder head screws

expand_moreAll other modifications

Figure 1. Cylinder head, Cylinder head screws, All other modifications.


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_moreValve cover


All other modifications	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 14 NV engines


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

expand_moreAll other modifications


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

expand_moreCrankshaft central screws

expand_moreAll Opel gasoline straight-4 1.4 L 14 NV 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 1.4 L C 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 other modifications


First stage	95.88 lbf⋅ft95.88 lbf⋅ft130 N⋅m
Use new screw.
Second stage	40–50°40–50°40–50°


Crankshaft pulley	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreFlywheel

expand_moreAll other modifications


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 C 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 other modifications


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


All other modifications	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_moreCamshaft timing gear

expand_moreAll Opel gasoline straight-4 1.4 L 14 NV 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°


All other modifications	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreToothed belt guard


All other modifications	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m


Toothed belt guard at the bottom	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m
Toothed belt guard at the top	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m

expand_moreToothed belt tensioning roller


All other modifications	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreEngine lubrication


Oil cooler lines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreOil drain plug


All Opel gasoline straight-4 1.4 L 14 NV engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
All other modifications	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m


Oil filter	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Oil filter housing	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreOil lines

expand_moreOil feed lines


On the engine block	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreReturn line


On engine sump	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Replace sealing rings.


Oil pump	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreOil sump

expand_moreAll other modifications

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

expand_moreEngine management


Crankshaft sensor	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Glow plugs	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreKnock sensor


All other modifications	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m


Lambda sensor	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Use assembly paste

expand_moreEngine mounting


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

expand_moreEngine mounting

expand_moreAll other modifications


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_moreExhaust system

expand_moreExhaust manifold


All other modifications	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_moreFuel supply


Fuel lines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreIgnition system

expand_moreSpark plugs


All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreStart system

expand_moreStarter

expand_moreAll other modifications


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

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 1991 Opel Astra Sedan 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 Sedan 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 1991 Opel Astra Sedan you're not only saving money, but also also improving your technical skills and learning something new.

1991 Opel Astra Sedan F Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Opel Astra Sedan F model years

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