1988 Opel Omega Sedan engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold

expand_moreAll Opel diesel straight-4 2.3 L 23 DTR engines


With hexagon-head screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
With Torx-head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll Opel diesel straight-4 2.3 L 23 YD engines


With hexagon-head screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
With Torx-head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll Opel diesel straight-4 2.3 L 23 YDT engines


With hexagon-head screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
With Torx-head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


All Opel gasoline straight-6 3.0 L 30 NE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All Opel gasoline straight-4 2.4 L C 24 NE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All Opel gasoline straight-6 3.0 L C 30 NE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws and nuts.

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt tensioner


2.0 i with gasoline straight-4 2.0 L 114 HP at 5400 RPM, 170 N⋅m at 2600 RPM engine (1986.9–1994.3)	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCarburetion


Injection nozzle (injector)	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m

expand_moreCooling system


Coolant pump	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Viscous fan clutch	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing


All Opel diesel straight-4 2.3 L 23 DTR engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
All Opel diesel straight-4 2.3 L 23 YD engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
All Opel diesel straight-4 2.3 L 23 YDT engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
All other modifications	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Use screw-locking compound.

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 1.8 L 18 SV engines


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

expand_moreAll Opel diesel straight-4 2.3 L 23 DTR engines


Conventional screws	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreMicroencapsulated screws


First stage	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Second stage	45°45°45°

expand_moreAll Opel diesel straight-4 2.3 L 23 YD engines


Conventional screws	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreMicroencapsulated screws


First stage	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Second stage	45°45°45°

expand_moreAll Opel diesel straight-4 2.3 L 23 YDT engines


Conventional screws	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreMicroencapsulated screws


First stage	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Second stage	45°45°45°

expand_moreAll Opel gasoline straight-4 1.8 L E 18 NVR engines


First stage	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Replace screws and nuts.
Second stage	45°45°45°
Third stage	15°15°15°


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

expand_moreCrankshaft central screws


All Opel diesel straight-4 2.3 L 23 DTR engines	162.26 lbf⋅ft162.26 lbf⋅ft220 N⋅m
All Opel diesel straight-4 2.3 L 23 YD engines	162.26 lbf⋅ft162.26 lbf⋅ft220 N⋅m
All Opel diesel straight-4 2.3 L 23 YDT engines	162.26 lbf⋅ft162.26 lbf⋅ft220 N⋅m
All Opel gasoline straight-6 3.0 L 30 NE engines	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
All Opel gasoline straight-4 2.4 L C 24 NE engines	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
All Opel gasoline straight-6 3.0 L C 30 NE engines	88.51 lbf⋅ft88.51 lbf⋅ft120 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°

expand_moreCrankshaft pulley


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

expand_moreFlywheel

expand_moreAll Opel gasoline straight-4 1.8 L 18 SV engines


First stage	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreAll Opel diesel straight-4 2.3 L 23 DTR engines


First stage	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Second stage	30°30°30°

expand_moreAll Opel diesel straight-4 2.3 L 23 YD engines


First stage	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Second stage	30°30°30°

expand_moreAll Opel diesel straight-4 2.3 L 23 YDT engines


First stage	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Second stage	30°30°30°


All Opel gasoline straight-6 3.0 L 30 NE engines	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Retap thread in holes and use new screws.
All Opel gasoline straight-6 3.0 L C 30 NE engines	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Retap thread in holes and use new screws.

expand_moreAll Opel gasoline straight-4 1.8 L E 18 NVR engines


First stage	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Replace screws and nuts.
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreAll other modifications


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Clean the thread, use new screws and screw-locking compound.
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreMain bearing

expand_moreAll Opel gasoline straight-4 1.8 L 18 SV 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_moreAll Opel diesel straight-4 2.3 L 23 DTR engines

expand_moreM10


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Second stage	45–60°45–60°45–60°

expand_moreM12


First stage	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Second stage	60°60°60°

expand_moreAll Opel diesel straight-4 2.3 L 23 YD engines

expand_moreM10


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Second stage	45–60°45–60°45–60°

expand_moreM12


First stage	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Second stage	60°60°60°

expand_moreAll Opel diesel straight-4 2.3 L 23 YDT engines

expand_moreM10


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Second stage	45–60°45–60°45–60°

expand_moreM12


First stage	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Second stage	60°60°60°

expand_moreAll Opel gasoline straight-4 1.8 L E 18 NVR 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°


All other modifications	81.13 lbf⋅ft81.13 lbf⋅ft110 N⋅m

expand_moreEngine control

expand_moreCamshaft timing gear


All Opel diesel straight-4 2.3 L 23 DTR engines	110.63 lbf⋅ft110.63 lbf⋅ft150 N⋅m
All Opel diesel straight-4 2.3 L 23 YD engines	110.63 lbf⋅ft110.63 lbf⋅ft150 N⋅m
All Opel diesel straight-4 2.3 L 23 YDT engines	110.63 lbf⋅ft110.63 lbf⋅ft150 N⋅m
All Opel gasoline straight-6 3.0 L 30 NE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All Opel gasoline straight-4 2.4 L C 24 NE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All Opel gasoline straight-6 3.0 L C 30 NE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All Opel gasoline straight-4 1.8 L E 18 NVR engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreAll other modifications


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°

expand_moreChain tensioner


All other modifications	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m


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

expand_moreEngine lubrication

expand_moreOil drain plug


All Opel gasoline straight-4 1.8 L E 18 NVR engines	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
All other modifications	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m


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

expand_moreOil sump


All Opel gasoline straight-4 1.8 L 18 SEH engines	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
All Opel gasoline straight-4 1.8 L 18 SV engines	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
All Opel gasoline straight-4 2.0 L 20 SE engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Clean the thread and use screw-locking compound.
All Opel gasoline straight-4 2.0 L C 20 NE engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Clean the thread and use screw-locking compound.
All Opel gasoline straight-4 1.8 L E 18 NVR engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All other modifications	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Clean the thread and use screw-locking compound.

expand_moreEngine management


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

expand_moreEngine mounting

expand_moreEngine bracket


2.0 i with gasoline straight-4 2.0 L 114 HP at 5400 RPM, 170 N⋅m at 2600 RPM engine (1986.9–1994.3)	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreEngine mounting

expand_more2.0 i with gasoline straight-4 2.0 L 114 HP at 5400 RPM, 170 N⋅m at 2600 RPM engine (1986.9–1994.3)


At the bracket	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
On chassis	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m

expand_moreExhaust system

expand_moreExhaust manifold

expand_moreAll Opel diesel straight-4 2.3 L 23 DTR engines


With hexagon-head screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
With Torx-head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll Opel diesel straight-4 2.3 L 23 YD engines


With hexagon-head screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
With Torx-head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll Opel diesel straight-4 2.3 L 23 YDT engines


With hexagon-head screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
With Torx-head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


All Opel gasoline straight-6 3.0 L 30 NE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All Opel gasoline straight-4 2.4 L C 24 NE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All Opel gasoline straight-6 3.0 L C 30 NE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws and nuts.

expand_moreIgnition system

expand_moreSpark plugs


All Opel gasoline straight-6 3.0 L 30 NE engines	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
All Opel gasoline straight-4 2.4 L C 24 NE engines	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
All Opel gasoline straight-6 3.0 L C 30 NE engines	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
All other modifications	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 1988 Opel Omega 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 Omega 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 1988 Opel Omega Sedan you're not only saving money, but also also improving your technical skills and learning something new.

1988 Opel Omega Sedan A Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Opel Omega Sedan A model years

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