1999 Alfa Romeo 166 fastener tightening specifications

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Condition	Value

expand_moreEngine tightening torques

expand_moreAir intake system

expand_moreIntake manifold


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m
All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m
All other modifications	14.01–16.96 lbf⋅ft14.01–16.96 lbf⋅ft19–23 N⋅m

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt deflection pulley


M10	31.72–39.09 lbf⋅ft31.72–39.09 lbf⋅ft43–53 N⋅m

expand_moreAuxiliary drive belt tensioner


All other modifications	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m

expand_moreAuxiliary drive belt tensioner


Alfa Romeo gasoline V6 2.5 L AR 34201 188 HP at 6200 RPM, 222 N⋅m at 5000 RPM	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m
Alfa Romeo gasoline V6 2.0 L AR 34102 202 HP at 6000 RPM, 280 N⋅m at 2500 RPM	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m
Alfa Romeo gasoline V6 3.0 L AR 34302 223 HP	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m
Alfa Romeo gasoline V6 3.0 L AR 34301 223 HP at 6200 RPM, 275 N⋅m at 5000 RPM	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m

expand_moreAll other modifications


M10	31.72–39.09 lbf⋅ft31.72–39.09 lbf⋅ft43–53 N⋅m
M8	16.96–20.65 lbf⋅ft16.96–20.65 lbf⋅ft23–28 N⋅m
All other modifications	33.19–40.57 lbf⋅ft33.19–40.57 lbf⋅ft45–55 N⋅m
Tensioning roller eccentric

expand_moreCarburetion

expand_moreInjection nozzle (injector)


All other modifications	19.18–23.6 lbf⋅ft19.18–23.6 lbf⋅ft26–32 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	11.8–13.28 lbf⋅ft11.8–13.28 lbf⋅ft16–18 N⋅m

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


M7	9.59–11.8 lbf⋅ft9.59–11.8 lbf⋅ft13–16 N⋅m


All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	9.59–11.8 lbf⋅ft9.59–11.8 lbf⋅ft13–16 N⋅m
All other modifications	13.28–14.75 lbf⋅ft13.28–14.75 lbf⋅ft18–20 N⋅m

expand_moreCylinder head screws


First stage	17.7–19.18 lbf⋅ft17.7–19.18 lbf⋅ft24–26 N⋅m
Second stage	240°240°240°

expand_moreValve cover


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	7.38–9.59 lbf⋅ft7.38–9.59 lbf⋅ft10–13 N⋅m

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


M6	5.9–7.38 lbf⋅ft5.9–7.38 lbf⋅ft8–10 N⋅m


All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	5.9–7.38 lbf⋅ft5.9–7.38 lbf⋅ft8–10 N⋅m
All other modifications	13.28–15.49 lbf⋅ft13.28–15.49 lbf⋅ft18–21 N⋅m

expand_moreEngine block

expand_moreConnecting rod bearing

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


First stage	17.7–19.18 lbf⋅ft17.7–19.18 lbf⋅ft24–26 N⋅m
Second stage	60°60°60°

expand_moreAll other modifications


First stage	14.01–15.49 lbf⋅ft14.01–15.49 lbf⋅ft19–21 N⋅m
Second stage	48–52°48–52°48–52°

expand_moreCrankshaft central screws


All Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines	250.77–278.8 lbf⋅ft250.77–278.8 lbf⋅ft340–378 N⋅m
All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	225.69–278.8 lbf⋅ft225.69–278.8 lbf⋅ft306–378 N⋅m
All other modifications	147.51–182.18 lbf⋅ft147.51–182.18 lbf⋅ft200–247 N⋅m

expand_moreCrankshaft pulley


Alfa Romeo diesel straight-5 2.4 L AR 34202 134 HP at 4000 RPM, 304 N⋅m at 2000 RPM	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m

expand_moreAlfa Romeo gasoline straight-4 2.0 L AR 34103 153 HP at 6400 RPM, 187 N⋅m at 2800 RPM


M6	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m
M8	19.91–25.08 lbf⋅ft19.91–25.08 lbf⋅ft27–34 N⋅m


All other modifications	147.51–182.18 lbf⋅ft147.51–182.18 lbf⋅ft200–247 N⋅m


Drive plate	101.05–111.37 lbf⋅ft101.05–111.37 lbf⋅ft137–151 N⋅m

expand_moreFlywheel


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	101.05–111.37 lbf⋅ft101.05–111.37 lbf⋅ft137–151 N⋅m
All Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines	100.31–123.91 lbf⋅ft100.31–123.91 lbf⋅ft136–168 N⋅m
All Alfa Romeo gasoline V6 2.5 L AR 34201 engines	85.56–95.15 lbf⋅ft85.56–95.15 lbf⋅ft116–129 N⋅m
All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	100.31–123.91 lbf⋅ft100.31–123.91 lbf⋅ft136–168 N⋅m
All Alfa Romeo gasoline V6 3.0 L AR 34301 engines	85.56–95.15 lbf⋅ft85.56–95.15 lbf⋅ft116–129 N⋅m
All Alfa Romeo gasoline V6 3.0 L AR 34302 engines	85.56–95.15 lbf⋅ft85.56–95.15 lbf⋅ft116–129 N⋅m

expand_moreAll other modifications


M12	106.21–129.81 lbf⋅ft106.21–129.81 lbf⋅ft144–176 N⋅m
Replace screws.

expand_moreMain bearing

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


First stage	17.7–19.18 lbf⋅ft17.7–19.18 lbf⋅ft24–26 N⋅m
Second stage	100°100°100°

expand_moreAll other modifications


First stage	17.7–19.18 lbf⋅ft17.7–19.18 lbf⋅ft24–26 N⋅m
Second stage	77–81°77–81°77–81°

expand_moreEngine control

expand_moreBalance shaft toothed belt tension pulley


M8	7.38–9.59 lbf⋅ft7.38–9.59 lbf⋅ft10–13 N⋅m

expand_moreCamshaft timing gear


Alfa Romeo diesel straight-5 2.4 L AR 34202 134 HP at 4000 RPM, 304 N⋅m at 2000 RPM	75.23–92.93 lbf⋅ft75.23–92.93 lbf⋅ft102–126 N⋅m

expand_moreAlfa Romeo gasoline straight-4 2.0 L AR 34103 153 HP at 6400 RPM, 187 N⋅m at 2800 RPM


M12	73.76–91.46 lbf⋅ft73.76–91.46 lbf⋅ft100–124 N⋅m
M6	7.38–9.59 lbf⋅ft7.38–9.59 lbf⋅ft10–13 N⋅m


Alfa Romeo gasoline V6 3.0 L AR 34302 223 HP	50.15–61.96 lbf⋅ft50.15–61.96 lbf⋅ft68–84 N⋅m
Alfa Romeo gasoline V6 3.0 L AR 34301 223 HP at 6200 RPM, 275 N⋅m at 5000 RPM	50.15–61.96 lbf⋅ft50.15–61.96 lbf⋅ft68–84 N⋅m
All other modifications	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m

expand_moreDrive belt tensioner device

expand_more2.0 V6 (936A3___) with gasoline V6 2.0 L 202 HP at 6000 RPM, 280 N⋅m at 2500 RPM engine (1998.9–2000.10)


M8	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m

expand_moreInlet camshaft wheel

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


M6	7.38–9.59 lbf⋅ft7.38–9.59 lbf⋅ft10–13 N⋅m


All Alfa Romeo gasoline V6 2.5 L AR 34201 engines	50.15–61.96 lbf⋅ft50.15–61.96 lbf⋅ft68–84 N⋅m

expand_moreOutlet camshaft wheel

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


M12	75.23–92.93 lbf⋅ft75.23–92.93 lbf⋅ft102–126 N⋅m


All Alfa Romeo gasoline V6 2.5 L AR 34201 engines	50.15–61.96 lbf⋅ft50.15–61.96 lbf⋅ft68–84 N⋅m

expand_moreToothed belt tensioning roller


Alfa Romeo diesel straight-5 2.4 L AR 34202 134 HP at 4000 RPM, 304 N⋅m at 2000 RPM	31.72–39.09 lbf⋅ft31.72–39.09 lbf⋅ft43–53 N⋅m

expand_moreAlfa Romeo gasoline straight-4 2.0 L AR 34103 153 HP at 6400 RPM, 187 N⋅m at 2800 RPM


M8	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m


Alfa Romeo gasoline V6 2.5 L AR 34201 188 HP at 6200 RPM, 222 N⋅m at 5000 RPM	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m

expand_moreAlfa Romeo gasoline V6 2.0 L AR 34102 202 HP at 6000 RPM, 280 N⋅m at 2500 RPM


M8	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m


Alfa Romeo gasoline V6 3.0 L AR 34302 223 HP	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m
Alfa Romeo gasoline V6 3.0 L AR 34301 223 HP at 6200 RPM, 275 N⋅m at 5000 RPM	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m
All other modifications	33.19–40.57 lbf⋅ft33.19–40.57 lbf⋅ft45–55 N⋅m

expand_moreToothed belt tightener


All Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m
All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	30.98–38.35 lbf⋅ft30.98–38.35 lbf⋅ft42–52 N⋅m
All other modifications	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m

expand_moreEngine lubrication

expand_moreOil drain plug


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	47.2–58.27 lbf⋅ft47.2–58.27 lbf⋅ft64–79 N⋅m
All Alfa Romeo gasoline V6 2.5 L AR 34201 engines	47.2–58.27 lbf⋅ft47.2–58.27 lbf⋅ft64–79 N⋅m
All Alfa Romeo gasoline V6 3.0 L AR 34301 engines	49.42–58.27 lbf⋅ft49.42–58.27 lbf⋅ft67–79 N⋅m
All Alfa Romeo gasoline V6 3.0 L AR 34302 engines	49.42–58.27 lbf⋅ft49.42–58.27 lbf⋅ft67–79 N⋅m
All other modifications	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m


Oil filter housing	10.33–14.75 lbf⋅ft10.33–14.75 lbf⋅ft14–20 N⋅m

expand_moreOil sump


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	9.59–11.8 lbf⋅ft9.59–11.8 lbf⋅ft13–16 N⋅m

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


M6	5.9–7.38 lbf⋅ft5.9–7.38 lbf⋅ft8–10 N⋅m
M8	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m

expand_moreAll Alfa Romeo diesel straight-5 2.4 L AR 34202 engines


M6	5.9–7.38 lbf⋅ft5.9–7.38 lbf⋅ft8–10 N⋅m
M8	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m


All other modifications	7.38–11.06 lbf⋅ft7.38–11.06 lbf⋅ft10–15 N⋅m

expand_moreEngine management


Glow plugs	9.59–11.8 lbf⋅ft9.59–11.8 lbf⋅ft13–16 N⋅m
Lambda sensor	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreExhaust system

expand_moreExhaust manifold


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines	12.54–15.49 lbf⋅ft12.54–15.49 lbf⋅ft17–21 N⋅m
All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m
All other modifications	14.01–16.96 lbf⋅ft14.01–16.96 lbf⋅ft19–23 N⋅m

expand_moreIgnition system

expand_moreSpark plugs


All Alfa Romeo gasoline V6 2.0 L AR 34102 engines	15.49–19.18 lbf⋅ft15.49–19.18 lbf⋅ft21–26 N⋅m

expand_moreAll Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines


M10	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
M14	20.65 lbf⋅ft20.65 lbf⋅ft28 N⋅m

expand_morePower transmission tightening torques

expand_moreClutch

expand_moreClutch pressure plate


All Alfa Romeo gasoline straight-4 2.0 L AR 34103 engines	14.75–18.44 lbf⋅ft14.75–18.44 lbf⋅ft20–25 N⋅m
All Alfa Romeo diesel straight-5 2.4 L AR 34202 engines	14.01–16.96 lbf⋅ft14.01–16.96 lbf⋅ft19–23 N⋅m
All other modifications	19.18–22.13 lbf⋅ft19.18–22.13 lbf⋅ft26–30 N⋅m

expand_moreGearbox lubrication

expand_moreGearbox oil drain plug

expand_moreAll other modifications

expand_moreWith manual transmission


M18	11.8–19.18 lbf⋅ft11.8–19.18 lbf⋅ft16–26 N⋅m
M22	22.13–35.4 lbf⋅ft22.13–35.4 lbf⋅ft30–48 N⋅m

expand_moreGearbox oil filler plug


With manual transmission	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreSuspension front tightening torques

expand_moreFront axle brake

expand_moreBrake hose


At the brake caliper	11.06–14.01 lbf⋅ft11.06–14.01 lbf⋅ft15–19 N⋅m
At the brake line	11.06–14.01 lbf⋅ft11.06–14.01 lbf⋅ft15–19 N⋅m


Front axle brake caliper	18.44–22.13 lbf⋅ft18.44–22.13 lbf⋅ft25–30 N⋅m
Front axle brake caliper mounting support	112.11–123.91 lbf⋅ft112.11–123.91 lbf⋅ft152–168 N⋅m
Front axle brake disc	9.59–15.49 lbf⋅ft9.59–15.49 lbf⋅ft13–21 N⋅m

expand_moreFront axle steering


Track rod end on stub axle	21.39–26.55 lbf⋅ft21.39–26.55 lbf⋅ft29–36 N⋅m
Track rod end on track rod	31.72–34.67 lbf⋅ft31.72–34.67 lbf⋅ft43–47 N⋅m

expand_moreWheel suspension


Wheel hub wheel bearing	262.57–295.02 lbf⋅ft262.57–295.02 lbf⋅ft356–400 N⋅m

expand_moreWheels and tires

expand_moreWheel attachment


Aluminium rims	61.22–75.97 lbf⋅ft61.22–75.97 lbf⋅ft83–103 N⋅m
Steel rims	53.84–66.38 lbf⋅ft53.84–66.38 lbf⋅ft73–90 N⋅m

expand_moreSuspension rear tightening torques

expand_moreRear axle brake


Rear axle brake caliper	18.44–22.13 lbf⋅ft18.44–22.13 lbf⋅ft25–30 N⋅m
Rear axle brake caliper mounting support	39.83–44.25 lbf⋅ft39.83–44.25 lbf⋅ft54–60 N⋅m
Rear axle brake disc	5.9–9.59 lbf⋅ft5.9–9.59 lbf⋅ft8–13 N⋅m

expand_moreRear axle wheel suspension


Wheel hub wheel bearing	224.22–247.82 lbf⋅ft224.22–247.82 lbf⋅ft304–336 N⋅m

expand_moreWheels and tires

expand_moreWheel attachment


Aluminium rims	61.22–75.97 lbf⋅ft61.22–75.97 lbf⋅ft83–103 N⋅m
Steel rims	53.84–66.38 lbf⋅ft53.84–66.38 lbf⋅ft73–90 N⋅m

When assembling your 1999 Alfa Romeo 166 it's important to tight threaded fasteners with Alfa Romeo prescribed torques using a torque wrench. If the torque values is lower then prescribed, bolt may unscrew itself and assembly may fall apart. If the torque value is higher then prescribed, bolt may simply break. The torque wrench allows you to tighten all bolts of the assembly with the same torque applied.

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 1999 Alfa Romeo 166 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 Alfa Romeo warranty policy for your region. In some regions DIY service may invalidate your warranty.

Maintenance Items

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 Alfa Romeo 166 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 Alfa Romeo 166 you're not only saving money, but also also improving your technical skills and learning something new.

1999 Alfa Romeo 166 Series 1 Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Alfa Romeo 166 Series 1 model years

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