A front impact has knocked the timing off on the 1UZ-FE in my 96 LS400. Can anybody explain the procedure for correcting it, i.e. crankshaft position, location of timing marks, ect. Have done many single cam v8 engines but never a dohc v8.
With crank pulley white mark on 0 remove both cam pulley covers and verify yellow painted notches are exactly on the T mark cast in the fwd cam bearing housings..IF u find that it ISNT 'in time' then remove tensioner located near crank pulley and very carefully manipulate the L and R cam sprokets to allow belt to removed from cam sprockets only... DoNOT rotate engine without T belt installed .Do NOT turn engine backwards.. ever.. be advised that should the cam timing be off by more than 3 teeth either way serious engine damage will result ..this series of engines utilizes variable intake camshaft adjustment .. This job is not for the american small block specialist of yesteryear.. even an experienced asian tech is gonna have a difficult time with this lexus .. its not quite the same engine the Tundra uses...Lexus only mods befuddle reg toyota techs
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best ask a steering specialist shop as the engine identification shows a es300 as a 1mz-fe (3.0 ltr) and a ls400 as a 1uz-fe (4.0 ltr)
there may be mounting differences between the engines
Hi there:I dont have this diagram for 2S-ELC, 3S-FE and 5S-FE Engines, but pay attention at this... To install:
Align the cutouts of the oil pump pulley and shaft, and slide the pulley on. Retain the pulley while tightening the nut to 21 ft. lbs. (28 Nm).
Align the crankshaft timing pulley set key with the key groove of the crankshaft pulley, then slide the pulley on.
Install the No. 2 idler pulley with the bolt and tighten to 31 ft. lbs. (42 Nm). Be sure the pulley moves smoothly.
Remove any oil or water on the idler pulley and keep it clean.
Temporarily install the No. 1 idler pulley with the retaining bolt. Hint: use a 1.65 inch (42mm) bolt in length. Do not tighten the bolt yet. Install the tension spring. Pry the pulley toward the left as far as it will go, then tighten the bolt.
Turn the crankshaft until the key groove in the crankshaft timing pulley is facing upward. Install the timing belt on the crankshaft timing, oil pump, No. 2 idler and water pump pulleys.
If the old timing belt is being reinstalled, make sure the directional arrow is facing in the original direction and that the belt and crankshaft gear matchmarks are properly aligned.
Install the lower (No. 1) timing belt cover and new gasket with the four bolts.
Align the crankshaft pulley set key with the pulley key groove. Install the pulley. Tighten the pulley bolt to 80 ft. lbs. (108 Nm).
On 2S-ELC engines, turn the crankshaft pulley and align the 0 mark on the lower (No. 1) timing belt cover.
Align the camshaft knock pin with the matchmarks on the oil seal retainer.
On 2S-ELC/USA engines, align the knock pin with the pin hole on the timing pulley E mark side. On 2S-ELC/Canadian engines, align the knock pin with the pin hole on the timing pulley. On 3S-FE and 5S-FE engines, align the knock pin with the groove of the pulley, and slide the pulley onto the camshaft with the plate washer and set bolt.
On 2S-ELC engines, make sure that the Matchmark on the oil seal retainer and center hole of the small hole on the camshaft timing pulley are aligned.
Using the removal tool to hold the pulley stationary, install and tighten the pulley set bolt to 40 ft. lbs. (54 Nm) on the 2S-ELC and the 3S-FE. On the 5S-FE, tighten the set bolt to 27 ft. lbs. (37 Nm).
On 3S-FE and 5S-FE engines, turn the crankshaft pulley and align the 0 mark on the lower (No. 1) timing belt cover.
Install the timing belt and check the valve timing as follows:
Align the matchmarks that you made previously, and install the timing belt onto the camshaft pulley.
Loosen the No. 1 idler pulley set bolt 1 / 2 turn.
Turn the crankshaft pulley two complete revolutions TDC to TDC. ALWAYS turn the crankshaft CLOCKWISE. Check that the pulleys are still in alignment with the timing marks.
Tighten the No. 1 idler pulley set bolt to 31 ft. lbs. (42 Nm).
Make sure there is belt tension between the crankshaft and camshaft timing pulleys.
Install the upper (No. 2) timing cover with a new gasket(s). On the 5S-FE, align the two clamps for the engine wiring harness with the cover mounting bolts.
Install the spark plugs.
Install the right mounting insulator with bracket. Tighten the bracket bolts to 38 ft. lbs. (52 Nm), insulator nuts to 38 ft. lbs. (52 Nm) and thru-bolt to 52 ft. lbs. (71 Nm). On the 5S-FE, install the No. 2 engine mount bracket and tighten to 38 ft. lbs. (52 Nm); install the control rod and tighten the bolts to 47 ft. lbs. (64 Nm).
Lower the engine.
On 3S-FE and 5S-FE engines, install the alternator and alternator bracket. On 2S-ELC engines, install the power steering reservoir tank.
Install the drive belt and adjust the tension.
Install the cruise control actuator with bracket.
Install the fender apron seal and right engine under cover.
On the 4A-FE engine do the following: Align the camshaft knock pin with the knock pin groove on the pulley side with the K mark, the slide on the timing pulley. Align the camshaft knock pin with the knock pin groove of the pulley, and slide on the pulley.
Align the camshaft knock pin with the groove on the pulley side with the K mark-4A-FE engine Temporarily install the timing pulley bolt. Hold the hexagonal wrench head portion of the camshaft with a wrench, and then tighten the timing pulley bolt to 43 ft. lbs. (59 Nm). Install the crankshaft pulley. Align the pulley set key with the groove of the pulley. Slide on the timing pulley, facing the flange side inwards.
2. TIMING CHAIN (2az-FE Engine): Before servicing the vehicle, refer to the Precautions Section. Drain the engine oil. Remove or disconnect the following: Negative battery cable HoodRight-side front wheelEngine under coversRight-side fender apron sealFront exhaust pipeEngine moving control rod and bracketRight-side engine mounting stay and bracketAccessory drive beltEngine appearance coverEngine wireAlternatorPower steering pump, leave the hoses connectedIgnition coilsVentilation hosesCylinder head coverTurn the crankshaft pulley to set the No. 1 cylinder to TDC compression. Align the groove on the pulley with the timing mark -0- on the front cover.Remove the crankshaft pulley as follows:
1. TMC made: Use Special Tool 09213-54015 to hold the pulley to loosen the bolt. Use Special Tool 09950-50013 to remove the bolt and pulley.
2. TMMK made: Use Special Tool 09960-10010 to hold the pulley to remove the bolt. Use Special Tool 09950-40011 to remove the crankshaft pulley
Fig. Removing the crankshaft pulley-TMC-2.4L (2AZ-FE) engine
Fig. Removing the crankshaft pulley-TMMK-2.4L (2AZ-FE) engine
Remove or disconnect the following: Crankshaft position sensorLower oil panNo. 1 chain tensionerAccessory drive belt tensioner
Support the engine with a suitable engine lifting device.
Remove or disconnect the following: Engine mounting insulatorsRight-side engine mounting bracketStud bolt for the accessory drive belt tensioner from the blockFront cover mounting bolts and nutsFront coverCrankshaft position sensor plateTiming chain tensioner slipperTiming chain vibration damperTiming chainCrankshaft timing sprocket
Turn the crankshaft counterclockwise by 90°, and align an adjusting hole of the oil pump driven sprocket with the groove of the oil pump.
Fig. Align the adjusting hole of the oil pump drive sprocket with the oil pump groove-2.4L (2AZ-FE) engine
Fig. Insert a bar to lock the sprocket in position-2.4L (2AZ-FE) engine Put a bar in the adjusting hole of the oil pump driven sprocket to temporarily lock the sprocket in position. Remove the nut.
Remove the bolt, chain tensioner and spring.
Remove the chain tensioner, oil pump sprocket and No. 2 timing chain.
To install: Set the crankshaft key into the left horizontal position. Turn the cutout of the drive shaft to the top
Fig. Align the crankshaft key and drive shaft cutout as shown for installation-2.4L (2AZ-FE) engine Align the yellow colored links with the timing marks of the sprocket as shown in the illustration.
Insert the sprockets with chain to the crankshaft and oil pump shaft.
Temporarily tighten the oil pump driven sprocket with the nut.
Insert the damper spring into the adjusting hole, and install the chain tensioner plate with the nut. Tighten to 9 ft. lbs. (12 Nm).
Align the adjusting hole of the oil pump driven sprocket with the groove of the oil pump.
Put a bar in the adjusting hole of the oil pump driven sprocket to temporarily lock the sprocket in position. Tighten the nut to 22 ft. lbs. (30 Nm).
Rotate the crankshaft counterclockwise by 90°, and align the crankshaft key to the top.
Install the timing chain vibration damper. Tighten to 80 inch lbs. (9 Nm).
Align the timing marks of the camshaft timing sprockets and bearing caps.
Using the crankshaft pulley bolt, turn the crankshaft and set the set key on the crankshaft upward.
Align the gold or orange colored link with the timing mark of the crankshaft timing sprocket.
Using Special Tool 09309-37010, tap in the sprocket.
Align the gold or yellow colored links with the timing marks of the camshaft timing gear and camshaft timing sprocket. Install the chain.
Fig. Align the marks of the sprockets and bearing caps to set the No. 1 cylinder at TDC-2.4L (2AZ-FE) engine Fig. Set the crankshaft set key facing upward-2.4L (2AZ-FE) engine Fig. Align the marked link of the timing chain with crankshaft sprocket timing mark-2.4L (2AZ-FE) engine Fig. Tap the crankshaft sprocket in with Special Tool 09309-37010-2.4L (2AZ-FE) engine
Fig. Align the marked links of the timing chain with the camshaft sprockets during installation-2.4L (2AZ-FE) engine
When install, align the crankshaft pulley set key with the pulley key groove.
Install the pulley. Tighten the pulley bolt to 80 ft. lbs. (108 Nm).
On 2S-ELC engines, turn the crankshaft pulley and align the
0
mark on the lower (No. 1) timing belt cover. Align the camshaft knock pin with the matchmarks on the oil seal retainer.
On 2S-ELC/USA engines, align the knock pin with the pin hole on the timing pulley
E
mark side. On 2S-ELC/Canadian engines, align the knock
pin with the pin hole on the timing pulley.
On 3S-FE and 5S-FE engines,
align the knock pin with the groove of the pulley, and slide the pulley
onto the camshaft with the plate washer and set bolt.
Remove the timing belt covers as previously detailed.
Raise the engine just enough to remove the weight from the engine mount on the right side.
Remove the thru-bolt, two nuts, and right hand mounting insulator.
Remove the retaining bolts and remove the right hand mounting bracket (from the side the alternator was removed from).
Remove the timing belt and timing belt guide. If the timing belt is to be reused, draw a directional arrow on the timing belt in the direction of engine rotation (clockwise) and place matchmarks on the timing belt and crankshaft gear.
Remove the bolt retaining the No. 1 idler pulley and tension spring.
Remove the No. 2 idler pulley.
Remove the crankshaft timing gear , if it can not be removed by hand, use two flat bladed tools to pry it off. Make sure to position shop rags to prevent damages to the components.
Remove the nut retaining the oil pump pulley.
To install:
Align the cutouts of the oil pump pulley and shaft, and slide the pulley on. Retain the pulley while tightening the nut to 21 ft. lbs. (28 Nm).
Align the crankshaft timing pulley set key with the key groove of the crankshaft pulley, then slide the pulley on.
Install the No. 2 idler pulley with the bolt and tighten to 31 ft. lbs. (42 Nm). Be sure the pulley moves smoothly.
NOTE: Remove any oil or water on the idler pulley and keep it clean.
Temporarily install the No. 1 idler pulley with the retaining bolt. Hint: use a 1.65 inch (42mm) bolt in length. Do not tighten the bolt yet. Install the tension spring. Pry the pulley toward the left as far as it will go, then tighten the bolt.
Turn the crankshaft until the key groove in the crankshaft timing pulley is facing upward. Install the timing belt on the crankshaft timing, oil pump, No. 2 idler and water pump pulleys.
NOTE: If the old timing belt is being reinstalled, make sure the directional arrow is facing in the original direction and that the belt and crankshaft gear matchmarks are properly aligned.
Install the lower (No. 1) timing belt cover and new gasket with the four bolts.
Align the crankshaft pulley set key with the pulley key groove. Install the pulley. Tighten the pulley bolt to 80 ft. lbs. (108 Nm).
On 2S-ELC engines, turn the crankshaft pulley and align the 0 mark on the lower (No. 1) timing belt cover.
Align the camshaft knock pin with the matchmarks on the oil seal retainer.
On 2S-ELC/USA engines, align the knock pin with the pin hole on the timing pulley E mark side. On 2S-ELC/Canadian engines, align the knock pin with the pin hole on the timing pulley. On 3S-FE and 5S-FE engines, align the knock pin with the groove of the pulley, and slide the pulley onto the camshaft with the plate washer and set bolt.
NOTE: On 2S-ELC engines, make sure that the Matchmark on the oil seal retainer and center hole of the small hole on the camshaft timing pulley are aligned.
Using the removal tool to hold the pulley stationary, install and tighten the pulley set bolt to 40 ft. lbs. (54 Nm) on the 2S-ELC and the 3S-FE. On the 5S-FE, tighten the set bolt to 27 ft. lbs. (37 Nm).
On 3S-FE and 5S-FE engines, turn the crankshaft pulley and align the 0 mark on the lower (No. 1) timing belt cover.
Install the timing belt and check the valve timing as follows:
Align the matchmarks that you made previously, and install the timing belt onto the camshaft pulley.
Loosen the No. 1 idler pulley set bolt 1⁄2 turn.
Turn the crankshaft pulley two complete revolutions TDC to TDC. ALWAYS turn the crankshaft CLOCKWISE. Check that the pulleys are still in alignment with the timing marks.
Tighten the No. 1 idler pulley set bolt to 31 ft. lbs. (42 Nm).
Make sure there is belt tension between the crankshaft and camshaft timing pulleys.
Install the upper (No. 2) timing cover with a new gasket(s). On the 5S-FE, align the two clamps for the engine wiring harness with the cover mounting bolts.
Install the spark plugs.
The remainder of installation is the reverse of removal. Tighten each component to specifications.
For the LS400 1UZ-FE V8 the firing order is 1-8-4-3-6-5-7-2, RH from the front 2-4-6-8, LH from the front 1-3-5-7. The RH/LH of the engine is facing forward, in other words, from the drivers seat looking forward.
For the LS400 1UZ-FE V8 the firing order is 1-8-4-3-6-5-7-2, RH from
the front 2-4-6-8, LH from the front 1-3-5-7. The RH/LH of the engine
is facing forward, in other words, from the drivers seat looking
forward.
Guru..saailer
seat looking forward.
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