2003 Toyota Prius engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system


Intake manifold	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAuxiliary assemblies


Air-conditioning compressor	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCarburetion


Injection nozzle (injector)	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreCooling system


Coolant pump	8.11 lbf⋅ft8.11 lbf⋅ft11 N⋅m
Coolant pump pulley	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing


Bearing cover on camshaft pulley	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
Otherwise	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m


Cylinder head screws shank length (maximum)	5.79 in5.79 in147.1 mm
Cylinder head screws shank length (new)	5.62–5.68 in5.62–5.68 in142.8–144.2 mm
Valve cover	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreEngine block

expand_moreConnecting rod bearing


First stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Second stage	90°90°90°


Crankshaft central screws	94.41 lbf⋅ft94.41 lbf⋅ft128 N⋅m
Crankshaft pulley	94.41 lbf⋅ft94.41 lbf⋅ft128 N⋅m

expand_moreFlywheel


First stage	61.96 lbf⋅ft61.96 lbf⋅ft84 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreMain bearing


First stage	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Second stage	90°90°90°

expand_moreEngine control


Camshaft timing chain guide rail	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Camshaft timing gear	47.2 lbf⋅ft47.2 lbf⋅ft64 N⋅m
Chain tensioner	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreEngine lubrication


Oil drain plug	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m
Replace sealing rings.
Oil sump	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreEngine management


Knock sensor	32.45 lbf⋅ft32.45 lbf⋅ft44 N⋅m
Lambda sensor	32.45 lbf⋅ft32.45 lbf⋅ft44 N⋅m

expand_moreEngine mounting


Engine bracket	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreExhaust system


Exhaust manifold	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m

expand_moreIgnition system


Spark plugs	13.28 lbf⋅ft13.28 lbf⋅ft18 N⋅m

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2003 Toyota Prius 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 Toyota 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 Toyota Prius 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 Toyota Prius you're not only saving money, but also also improving your technical skills and learning something new.

2003 Toyota Prius generations

In 2003 Toyota offered 2 generations of the Prius. Engine fastener tightening specifications may vary in different generations. Be sure that you are looking at the rigt modification.

Second generation

NHW20

2003 Toyota Prius First generation facelift Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

2003 Toyota Prius generations

Second generation

Toyota Prius First generation facelift model years

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