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Nissan Maxima 1993-1998
See Figures 1 through 26
The cylinder heads and the oil pan must be removed in order for the lower timing chain to be removed.
FIG : Fig. 1: Exploded view of the VE30DE timing chain assemblies and related components
Fig. Fig. 2: Remove the three bolts retaining the upper chain guides ...
Fig. Fig. 3: ... and lift it from the cylinder head
Fig. Fig. 4: To allow access to the camshaft sprocket bolts, unbolt the upper timing chain cover ...
Fig. Fig. 5: ... and carefully pry the cover away from the cylinder head
Fig. Fig. 6: The number one cylinder is at TDC when the timing marks are aligned as shown
Fig. Fig. 7: It may be helpful to paint marks on the chain and sprockets if the marks are not easily visible
Fig. Fig. 8: Remove the two bolts attaching the upper timing chain tensioners
Fig. Fig. 9: When installing the chain tensioners, carefully press the tensioner in and lock it in position with the clip
Fig. Fig. 10: Always use a back up wrench on the camshaft when removing the sprocket bolts; NEVER use the chain to provide tension
Fig. Fig. 11: Remove the intake and exhaust camshaft sprockets and set the timing chain under the camshafts
Fig. Fig. 12: Always lubricate the threads of the camshaft sprocket bolts to obtain a correct torque reading
FIG : Fig. 13: Lower timing chain and related components
FIG : Fig. 14: Positions for applying liquid gasket to the timing chain related components
Fig. Fig. 15: Make sure the crankshaft sprocket is installed in the proper direction
FIG : Fig. 16: Install the lower timing chain guides and the right side idler sprocket to the engine block
FIG : Fig. 17: Line up the mating marks on the lower timing chain with the marks on the sprockets
Position the upper timing chains on the idler sprockets by aligning the mating marks on the idler sprockets with the gold mating marks on the upper timing chains.
FIG : Fig. 18: Have an assistant hold the upper timing chains in position while installing the lower timing chain cover
Install the oil pump drive spacer, the timing chain cover and the alternator adjusting bar by performing the following procedures:
FIG : Fig. 20: After the lower timing chain cover is installed, be sure to wipe the excess liquid gasket from the cylinder heads ...
FIG : Fig. 21: ... and the engine block/oil pan mating surface
Fig. Fig. 22: The crankshaft should be rotated counterclockwise 120°from TDC before cylinder head installation
FIG : Fig. 23: Position the camshafts as shown before tightening the brackets
FIG : Fig. 24: When the mating marks on the right (rear) cylinder head exhaust camshaft are matched, note the intake side is not yet in line
There are 2 types of chain tensioners; be careful not to install the left chain tensioner onto the right cylinder head.
FIG : Fig. 25: Note the difference between the two upper chain tensioners; be careful not to install them incorrectly
See Figures 27 through 40
FIG : Fig. 27: Exploded view of the VQ30DE timing chain and related components
FIG : Fig. 28: Be careful when removing the camshaft and crankshaft position sensors; they are delicate and are easily damaged
Fig. Fig. 29: The water pump cover should be removed to remove the front timing chain cover
Fig. Fig. 30: Front timing chain cover bolt removal sequence
Fig. Fig. 31: Use the notch in the front timing chain cover to pry it from the rear cover
: Fig. 32: Timing chain guide locations
FIG : Fig. 33: Always use a backup wrench on the camshaft when loosening the bolts; NEVER use the chain to provide tension
Fig. Fig. 34: Push in on the chain tensioners and hold them in place by placing a pin in the holes as shown
FIG : Fig. 35: Details for applying liquid gasket to the timing chain covers and related components
Fig. Fig. 36: When installing the crankshaft sprocket, be sure it is properly positioned
Fig. Fig. 37: The arrow should be pointing up when the lower chain guide is installed
Fig. Fig. 38: Be sure the camshaft sprockets are mounted on their respective camshafts; the intake camshaft sprockets differ from the exhaust
FIG : Fig. 39: Align the mating marks on the chains with the sprockets, then install them onto the camshafts
Be careful not to confuse the intake and exhaust camshaft sprockets. The exhaust camshaft sprockets are thicker than the intake camshaft sprockets.
FIG : Fig. 40: Align the mating marks on the chain with the sprockets, then place the chain on the water pump sprocket
After checking that all of the mating marks on the chains and sprockets are correct, temporarily install the crankshaft damper and SLOWLY rotate the engine by hand at least one full revolution to verify the camshaft/crankshaft timing is correct. If the crankshaft stops suddenly, a piston is hitting a valve. Do NOT force the engine to rotate; bent valves will result. Check the mating marks on the sprockets and the chains, and perform any procedures as necessary to correct misalignment.
The engine may produce a rattling noise when it is started. Run the engine at around 3,000RPM in neutral to purge the air from the hydraulic chain tensioner.
Nissan Maxima 1993-1998 Repair Guide
These vehicles use a complex electronic fuel injection system which is controlled by a series of temperature and air flow sensors which feed information into an Engine Control Module, or ECM. The ECM regulates ignition timing and fuel delivery based on the input of the engine sensors to achieve maximum performance and fuel economy.
The ignition timing on these vehicles is set at the factory, and does not normally require adjustment. The following procedures are included to check or reset the ignition timing if the distributor, crankshaft or camshaft position sensor have been replaced.
See Figure 1
Fig. Fig. 1: View of the timing marks on the crankshaft pulley-VE30DE and VG30E engines
CAUTION The radiator cooling fan may cycle during this procedure. Be sure to keep your hands and tools away from the fan blades.
See Figures 2, 3, 4, 5, 6 and 7
Fig. Fig. 2: Clean the marks on the pulley and outline them with correction fluid to allow easier viewing
Fig. Fig. 3: To connect a timing light to VE30DE and VQ30DE engines, you will need to make a jumper wire from a standard spark plug wire
Fig. Fig. 4: The jumper wire will go between the individual plug coil and the plug itself, allowing attachment of an inductive pickup from a timing light
Fig. Fig. 5: It is advisable to mark the sensor for a reference point when adjusting the timing
Fig. Fig. 6: Loosen the bolts on the camshaft sensor just enough to move it by hand with moderate force
Fig. Fig. 7: Move the sensor in small increments to adjust the timing
See Figures 8 and 9
The ignition timing on this engine is not adjustable. If not within specifications, further diagnostic inspection is required. The following procedure is for viewing the ignition timing setting.
CAUTION The radiator cooling fan may cycle during this procedure. Be sure to keep your hands and tools away form the fan blades.
Fig. Fig. 8: View of the timing marks on the VQ30DE engine
Fig. Fig. 9: Unplug the throttle position sensor when checking the ignition timing