Replacing the timing belt and water pump on your first generation Lexus IS is a pretty complicated job and you have to be extra careful with the timing system not to upset its settings and damage the engine.
You’re gonna need a 3/8” ratchet, 1/2” breaker bar, a pry bar or SCH64300 special tool and a complete set of sockets and wrenches. Here are the main steps to follow:
Water pump
Let the engine cool off of you have used the car
Remove the radiator assembly to have more space for the main job
Loosen the 4 nuts holding the water pump pulley attached to the pump
Loosen the drive belt tensioner by turning the it clockwise and remove the drive belt
Remove the 4 nuts and take out the water pump pulley
Now, remove the timing belt and idler pulley
Take out the water bypass outlet, water inlet and thermostat
Remove the water pump
Install the new pump and put back the other parts.
Timing Belt
Let the engine cool off
Remove engine under cover
Drain engine coolant and remove radiator
Remove drive belt tensioner absorber
Remove drive belt
Take out PS Pump and front bracket
Remove no.3 and 2 timing belt cover
Remove drive belt tensioner
Loosen crankshaft pulley bolt
Set no.1 cylinder to about 60 degrees/BTDC compression
Remove timing belt from camshaft timing pulleys
Remove exhaust camshaft timing pulley
Take out engine cover and remove throttle body and intake air connector assembly
Remove no.1 cylinder head cover
Remove camshaft timing oil control valve
Disconnect no.1 oil pipe
Remove VVT-i pulley
Remove crankshaft pulley
Remove no.1 timing belt cover and guide
Remove timing belt
Remove idler pulley and crankshaft timing pulley
Install the new parts following the steps in reverse order.
See the video bellow for more info.
This is a DIY guide and, as such, you must be aware the procedures described here involve some risks. autoevolution cannot be held responsible for any possible damage that might result while following this guide.
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