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Replacing timing belt,Sienna 1998: 1.Disconnect battery (-) cable and plastic wiper washer cowl assembly 2.Remove spark plugs and put all wirings,cables out of the way 3.Drain coolant (cold) and remove upper hose 4.remove front right tire and wheel plastic fender apron 5.jack up engine under oil pan with rubber,towel or wood slightly 6.remove right engine support rod and its bracket 7.remove all drive belts.Examine condition;Label if re-using 8.remove plastic upper timing belt cover & gasket 9.remove crankshaft pulley bolt-use the ff. methods: a.air impact wrench or Toyota Special service tool-best b.chain wrench on pulley then breaker bar/socket on bolt-good c.open fly wheel cover,jam screwdriver on gear teeth then unbolt-tough d.breaker bar/socket on bolt, jam bar tip on floor, lower car then "start" engine -smart 10.remove pulley by hand or use carefully 2 prybars then remove plastic lower T.B.coverand gasket 11.reinstall bolt and turn engine clockwise to align timing marks:one on each camshaft sprocket and one on the crankshaft sprocket 12.remove T.B. tensioner spring-2 bolts loosen alternately then keep upright 13.remove crankshaft sprocket guard then the sprocket, then the belt. 14.Examine belt condition for damage and correct cause of damage if any 15.remove idler T.B.pulleys & check for smooth operation/contamination/leak 16.check all oil seals, water pump leaks,etc 17.Check T.B.tensioner spring for oil leak and tension by pressing push rod against hard object-there should be no movement or leak 18.Compress push rod using vise, align rod hole with outer hole then insert small nail, pin or wire to keep it there then reinstall along with other parts removed 19.Install T.B.carefully.No twist, stretch,prying ,oil, moisture, bending 20.Handturn engine 720 deg.clockwise, feel for resistance , and then see timing marks still re-align 21.Reinstall plastic covers and gaskets,drive belts.etc in reverse order 21.

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โˆ™ 2005-04-07 16:41:06
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Q: What is the procedure for changing the timing belt on a 1998 Toyota Sienna?
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