As long as the timing marks on the cams and the crank are correct and the chain is the correct length. And the chain tensioner is set correctly, the chain doesn't need to be marked.
Testimonial: "thanks Simon, appreciate your feedback,"
SOURCE: timimg for a 1990 nissan maxima
If your belt came with marks, then they should match the marks that are on the sprockets and block, if not, you must have the cam marks align with those on the engine. If you're in doubt about the exact spot, lay a tooth pick across the sprockets so that you can check alignment to the block.
SOURCE: changed timing chain and need to align to cam with the crang
Align the chain with the colored links on the chain over the marks on the cams.Twin cams Have a small hole on the cam gears that will align with a hole in the front of head.Crank Gear has a pip mark that goes straight up.colored links on crank go to the 5 & 7 Oclock position on the lower crank gear with pip mark on crank gear at 12:00.Hope this helps
SOURCE: How do you set the timing on a 2005 nissan altima
The cam has an access cover that allows you to see that the timing points line up. You have to look at the cam from the end on the passenger side and see that the points line up. This is done by making sure the lower pulley is on Top Dead Center and then look to see that the cam and the pointer line up with the inspection cover removed.,,,,,,, I copied this from somebody else, I thought I would pass it on. I have a Nissan Sentra, but I am not familiar with the cams. Hope this helps.
SOURCE: replacing timing chain 2000 corolla 1,8 eng
!!! Check first if engine valves are not bended !!!
The timing chain diagram & procedures for 2000 Toyota Corrola 1.8 engine:
Special tools:
1. Crankshaft pulley holder - Tool No. 09213-70010/11.
2. Crankshaft pulley puller - Tool No. 09950-50012.
General precautions:
1. Disconnect battery earth lead.
2. Remove spark plugs to ease turning engine.
3. Turn engine in normal direction of rotation.
4. Observe tightening torques in pictures below.
5. Do NOT turn crankshaft via camshaft or other sprockets.
6. Do NOT turn crankshaft or camshaft with timing chain removed.
7. Mark position of crankshaft position (CKP) sensor before removal.
Valve timing procedures:
1. Ensure crankshaft pulley and timing chain cover TDC marks aligned [1].
2. Ensure teeth timing mark on each camshaft sprocket aligned.
3. 1ZZ-FE/3ZZ-FE/4ZZ-FE [2].
4. 2ZZ-GE [12] OR [13].
5. If not, turn crankshaft pulley 360 degrees.
6. Remove chain tensioner, tensioner rail and chain guide.
7. Check chain for wear.
Timing the Cam to the Crank
There are several ways to time the cam to the crank. Be sure to check the manual before you install the timing chain or belt.
If the old parts are available, carefully compare the new gears or sprockets with the old ones. Check the keyway and timing marks just in case there might have been an error made in manufacturing. Sprockets are sometimes stamped backward. Its much better to find the problem during assembly, rather than waiting until problems show up after reassembly and reinstallation.
Maintaining Valve Timing
During a valve job, it is essential to keep the timing chain or belt in place to maintain correct valve timing. Position the number one cylinder at TDC. Some overhead cam engines use a single long chain for a cam drive. The chain can be wedged against its guides with a tapered block of wood.
the chain tensioner on some ohc engines must be wedged to keep the chain in position during cylinder head removal. courtesy of nissan motors.
Some engines have a lower and upper chain. These engines do not require special attention to wedging the chain. Be sure to look for hidden head bolts and check the repair manual before removing the OHC head.
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