What is timing belt cam gear Dot and line alignment?

Timing Belt Cam Gear Dot and Line Alignment HELP! Ok, i’m really confused now. I have a 98 6spd 2JZGTE Engine, and when you align your timing belt, your factory cam gears has both a dots and a lines, and your factory crank pulley has both a white line and a yellow line.

When to replace timing belt and gear set?

Don’t take a chance reusing an old timing belt, chain or gear set. A high mileage timing chain that has stretched and is loose can’t maintain accurate valve timing and should be replaced if play exceeds specifications. The camshaft and crankshaft sprockets should also be replaced along with chain.

Why do they put second marks on timing belt?

The reason they added the second marks is for the NA vvti motors which are interference so you could line everything up 30 degrees off of top dead center and not have to worry about bending valves. Hope this helps and I didnt add to your confusion.

How to line up timing marks on a Subaru?

Then you can free spin the cam sprockets as much as you want with any tool you choose – since the crank is lined up, all 4 pistons are half way down the cylinder walls and nothing will touch no matter what you do. ^thats exactly what i did, got the belt on, everything works great. :sunny:

When to replace timing chains and guide assemblies?

The two DOHC timing chains and guide assemblies should also be replaced at the same time. As for timing belts, they do not stretch with age, but become weak internally and may fail with no warning. Consequently, a visual inspection of the belt may not reveal much. If the mileage is not known, replace the belt.

Where is the timing mark on a camshaft?

Turn the crankshaft pulley, and align its groove with timing mark “T” of the timing belt cover. Check that the timing mark of camshaft sprocket is aligned with the timing mark of cylinder head cover. (No.1 cylinder compression TDC position) Remove the crankshaft pulley bolt and crankshaft pulley (A).

How do you find timing marks on a crankshaft?

Locate the micro phone close to the center of belt span (T1, T2) and bounce the belt by finger 2 – 3 times. Read a value on the display. Turn the crankshaft two turns in the operating direction (clockwise) and realign crankshaft sprocket and camshaft sprocket timing mark. Install the timing belt lower cover (A) with 5bolts (B).

How many links are in a timing belt?

Counting the colored links there are seven links. I count 8 on mine and 8 on the head that I removed. When I use the colored links to the alignment marks the exhaust cam doesn’t line up for the timing belt mark at the other end. helpful?

Where are the lines on a cam belt?

The lines on cam gears are exactly 30 degrees from the dots and the grooves on the harmonic balancer are 60 degrees from each other, so as long as the first set of marks line up and the second marks line up as your turning the motor you have the belt on correctly.

Where are the dot and line on the cam gears?

No wonder you’re mixed up, that video shows VVTI engine which has the dot and line on the cam gears and 2 lines on the crank pulley, non VVTI engines like that on the 97supraturbo.com only have 1 line both on cam gears and crank pulley. Depending on which engine you have, VVTI or not, follow their respective procedure.

What happens when the timing belt wears out?

For those who aren’t familiar. The job of the timing belt is to position the valves correctly in relation to the pistons for intake of fuel and exhaust. So, when a timing belt is set in the incorrect position (or wears out), valves can be smashed by the pistons and severe engine damage occurs.

What is timing belt cam gear Dot and line alignment?