1999 Vauxhall Omega Wagon engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


All Vauxhall gasoline V6 2.5 L X 25 XE engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Vauxhall gasoline V6 3.0 L X 30 XE engines	14.75 lbf⋅ft14.75 lbf⋅ft20 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


All Vauxhall gasoline straight-4 2.0 L X 20 XEV engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All other modifications	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreAuxiliary drive belt tensioner


All Vauxhall gasoline V6 2.5 L X 25 XE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All Vauxhall gasoline V6 3.0 L X 30 XE engines	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreServo pump pulley


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreCarburetion

expand_moreHigh-pressure pump pulley

expand_moreInjection nozzle (injector)


All Vauxhall diesel straight-6 2.5 L 25 DT engines	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines


First stage	hand-screwed
Second stage	360°360°360°


All Vauxhall diesel straight-6 2.5 L X 25 DT engines	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreCooling system


Coolant pump	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCoolant pump pulley


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second stage	30°30°30°
Third stage	30°30°30°

expand_moreCylinder head

expand_moreCamshaft bearing


All Vauxhall diesel straight-6 2.5 L 25 DT engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All Vauxhall diesel straight-4 2.0 L X 20 DTH engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All Vauxhall diesel straight-6 2.5 L X 25 DT engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All other modifications	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCylinder head screws

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines

Figure 1. Cylinder head, Cylinder head screws, Vauxhall diesel straight-6 2.5 L 25 DT.


First stage	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Replace screws. See figure 1.
Second stage	180° detach
Third stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Fourth stage	90–100°90–100°90–100°
Fifth stage	90–100°90–100°90–100°
Sixth stage	Warm-up run
Seventh stage	90–100°90–100°90–100°

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines

expand_moreScrews 1 – 10

Figure 2. Cylinder head, Cylinder head screws, Vauxhall diesel straight-4 2.0 L X 20 DTH, Screws 1 – 10.


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws. See figure 2.
Second stage	65°65°65°
Third stage	65°65°65°
Fourth stage	65°65°65°
Fifth stage	65°65°65°
Sixth stage	15°15°15°

expand_moreScrews 11 – 14


Seventh stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Eighth stage	30°30°30°
Ninth stage	5°5°5°

expand_moreAll Vauxhall gasoline straight-4 2.0 L X 20 SE engines

Figure 3. Cylinder head, Cylinder head screws, Vauxhall gasoline straight-4 2.0 L X 20 SE.


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws. See figure 3.
Second stage	90°90°90°
Third stage	90°90°90°
Fourth stage	90°90°90°

expand_moreAll other modifications


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws. See figure 3.
Second stage	90°90°90°
Third stage	90°90°90°
Fourth stage	90°90°90°
Fifth stage	15°15°15°

expand_moreValve cover


All Vauxhall diesel straight-6 2.5 L 25 DT engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All Vauxhall diesel straight-6 2.5 L X 25 DT engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All other modifications	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreEngine block

expand_moreConnecting rod bearing

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	70°70°70°

expand_moreAll other modifications


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

expand_moreCrankshaft central screws

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines


First stage	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Replace screws.
Second stage	90°90°90°
Third stage	60°60°60°

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines


First stage	110.63 lbf⋅ft110.63 lbf⋅ft150 N⋅m
Replace screws.
Second stage	45°45°45°
Third stage	15°15°15°

expand_moreAll Vauxhall gasoline V6 2.5 L X 25 XE engines


First stage	184.39 lbf⋅ft184.39 lbf⋅ft250 N⋅m
Replace screws.
Second stage	45°45°45°
Third stage	15°15°15°

expand_moreAll other modifications


First stage	95.88 lbf⋅ft95.88 lbf⋅ft130 N⋅m
Replace screws.
Second stage	40–50°40–50°40–50°


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

expand_moreFlywheel


All Vauxhall diesel straight-6 2.5 L 25 DT engines	82.61 lbf⋅ft82.61 lbf⋅ft112 N⋅m

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines


First stage	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Replace screws.
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreAll Vauxhall gasoline straight-4 2.0 L X 20 SE engines


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreAll Vauxhall gasoline straight-4 2.0 L X 20 XEV engines


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


All Vauxhall diesel straight-6 2.5 L X 25 DT engines	82.61 lbf⋅ft82.61 lbf⋅ft112 N⋅m

expand_moreAll Vauxhall gasoline straight-4 2.2 L Y 22 XE engines


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

expand_moreAll other modifications


First stage	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Replace screws. Use screw-locking compound.
Second stage	30°30°30°
Third stage	15°15°15°

expand_moreMain bearing

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws.
Second stage	50°50°50°

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines


First stage	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Replace screws.
Second stage	60°60°60°
Third stage	15°15°15°

expand_moreAll Vauxhall gasoline V6 3.0 L X 30 XE engines


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

expand_moreAll other modifications


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

expand_moreVibration damper

expand_moreEngine control

expand_moreCamshaft drive belt deflection pulley

expand_moreAll Vauxhall gasoline straight-4 2.0 L X 20 XEV engines


Inlet camshaft	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Outlet camshaft	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll Vauxhall gasoline straight-4 2.2 L Y 22 XE engines


Inlet camshaft	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Outlet camshaft	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


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

expand_moreCamshaft timing gear

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Second stage	35°35°35°

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines


First stage	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Replace screws.
Second stage	60°60°60°
Third stage	30°30°30°


All Vauxhall gasoline straight-4 2.0 L X 20 SE 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.
Second stage	60°60°60°
Third stage	15°15°15°

expand_moreChain tensioner

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines


Cap	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreAll other modifications


Cap	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Chain tensioner	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m

expand_moreTension rail bearing screws

expand_moreTiming case cover

expand_moreToothed belt guard


All Vauxhall gasoline straight-4 2.0 L X 20 SE engines	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m
All Vauxhall gasoline straight-4 2.0 L X 20 XEV engines	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
All other modifications	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m


Toothed belt tensioning roller	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreEngine lubrication

expand_moreOil drain plug

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines


M12	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M16	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m


All Vauxhall diesel straight-4 2.0 L X 20 DTH engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
All Vauxhall gasoline straight-4 2.0 L X 20 SE engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreAll Vauxhall gasoline straight-4 2.0 L X 20 XEV engines


Torx screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
With hexagon-head screws	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m


All Vauxhall gasoline V6 2.5 L X 25 XE engines	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreAll Vauxhall gasoline V6 3.0 L X 30 XE engines


Torx screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
With hexagon-head screws	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreAll Vauxhall gasoline straight-4 2.2 L Y 22 XE engines


Torx screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
With hexagon-head screws	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreOil filter housing

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines


Metal cap	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Plastic cap	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


All Vauxhall gasoline straight-4 2.0 L X 20 SE engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All Vauxhall gasoline straight-4 2.0 L X 20 XEV engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All Vauxhall gasoline V6 2.5 L X 25 XE engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreOil sump

expand_moreAll Vauxhall diesel straight-6 2.5 L 25 DT engines


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll Vauxhall diesel straight-4 2.0 L X 20 DTH engines


Oil sump lower part	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Oil sump top part	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


All Vauxhall gasoline straight-4 2.0 L X 20 SE engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Clean the thread and use screw-locking compound.

expand_moreAll Vauxhall gasoline straight-4 2.0 L X 20 XEV engines


At the gearbox	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Oil sump lower part	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Oil sump top part	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Clean the thread and use screw-locking compound.


All Vauxhall gasoline V6 2.5 L X 25 XE engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Clean the thread and use screw-locking compound.

expand_moreAll Vauxhall gasoline V6 3.0 L X 30 XE engines

expand_moreOil sump top part

expand_moreAt the gearbox


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


On the engine block	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreOil sump lower part


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws and nuts.
Second stage	30°30°30°


All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Clean the thread and use screw-locking compound.
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Clean the thread and use screw-locking compound.

expand_moreEngine management

expand_moreCamshaft sensor


All Vauxhall gasoline straight-4 2.0 L X 20 XEV engines	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
All Vauxhall gasoline straight-4 2.2 L Y 22 XE engines	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
All Vauxhall gasoline straight-4 2.2 L Z 22 XE engines	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
All other modifications	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m


Crankshaft sensor	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreGlow plugs


All Vauxhall diesel straight-6 2.5 L 25 DT engines	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
All Vauxhall diesel straight-6 2.5 L X 25 DT engines	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
All other modifications	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreKnock sensor


All Vauxhall gasoline straight-4 2.0 L X 20 SE engines	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
All Vauxhall gasoline straight-4 2.0 L X 20 XEV engines	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
All other modifications	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreLambda sensor


All Vauxhall gasoline V6 2.5 L X 25 XE engines	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
All other modifications	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Use assembly paste

expand_moreExhaust system

expand_moreExhaust manifold


All Vauxhall diesel straight-6 2.5 L 25 DT engines	17.7 lbf⋅ft17.7 lbf⋅ft24 N⋅m
Replace screws and nuts.
All Vauxhall diesel straight-6 2.5 L X 25 DT engines	17.7 lbf⋅ft17.7 lbf⋅ft24 N⋅m
Replace screws and nuts.
All Vauxhall gasoline V6 2.5 L X 25 XE engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws and nuts.
All Vauxhall gasoline V6 3.0 L X 30 XE engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws and nuts.
All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws and nuts.

expand_moreIgnition system


Spark plugs	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 1999 Vauxhall Omega 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 Vauxhall 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 Vauxhall Omega 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 1999 Vauxhall Omega Wagon you're not only saving money, but also also improving your technical skills and learning something new.

1999 Vauxhall Omega Wagon generations

In 1999 Vauxhall offered 2 generations of the Omega Wagon. Engine fastener tightening specifications may vary in different generations. Be sure that you are looking at the rigt modification.

1999 Vauxhall Omega Wagon First generation (MK1) Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

1999 Vauxhall Omega Wagon generations

First generation facelift (MK1)

Vauxhall Omega Wagon First generation (MK1) model years

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