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.
What do you need to know about pulley alignment?
This guide provides information for the implementation of good pulley alignment of belt-driven equipment including terminology, alignment methods as well as belt maintenance, storage and tensioning. The content of this guide and our 5-Step Sheave/Pulley Alignment Procedure are basic guides to re-align machines.
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.
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.
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.
Where are the timing marks on a timing belt?
(2a) Find the timing marks on the flywheel and cam, and set them both to TDC. (2b) The flywheel pulley TDC mark is accessible through a hole in the bellhousing. (2c) The camshaft TDC is easy to find — especially if you add white paint as we did.
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.
What happens if you take the timing belt off an engine?
Warning: If you know you’re working on an interference engine, do not rotate the camshaft or the crankshaft independently while the timing belt is off the engine. You could cause the pistons to hit the valves, or vice versa, and cause the same damage as if the timing belt had snapped with the engine running — bent valves!
What should I do if my timing belt broke?
Aligning the camshaft if your timing belt broke is something you need to do very specifically or you risk destroying your entire engine. Align the camshaft if your timing belt broke with help from an experienced automotive professional in this free video clip.
Where are the timing marks on a camshaft?
(2a) Find the timing marks on the flywheel and cam, and set them both to TDC. (2b) The flywheel pulley TDC mark is accessible through a hole in the bellhousing. (2c) The camshaft TDC is easy to find — especially if you add white paint as we did. We cannot stress this enough: Be careful!
Why do you need to lock down the timing belt?
Even though belts will not last as long as a chain, they are quieter and often easier to line up correctly with the cam and crank locked down. Anytime the belt is removed, the cam and crank need to be aligned to TDC No.1, which is where the marks on the crankshaft pulley line up with the pointer on the front cover.
Even though belts will not last as long as a chain, they are quieter and often easier to line up correctly with the cam and crank locked down. Anytime the belt is removed, the cam and crank need to be aligned to TDC No.1, which is where the marks on the crankshaft pulley line up with the pointer on the front cover.
Do you have to be dead on with timing belt alignment?
Because modern vehicles use so many electronics to control the engine with things such as crank and camshaft timing sensors, technicians need to be, as we say in the industry, “dead-on” with the timing belt alignment. The cam gear cannot be off by even a tooth, or the engine will set a DTC.
Where are the timing marks on the crankshaft?
For the crankshaft below, there probably will be a timing mark on the damper pulley that lines up with another mark on the lower cover. Or, the service manual may direct you to the transmission end of the engine to look through a hole in the bellhousing for a timing mark on the flywheel.
What’s the best way to set the cam timing?
Rotate crank until the rockers on cylinder one are holding both valves open a little. This is the overlap period and how you are going to set the cam timing. Look at the pointer and pulley. Rotate crank to set them so they are directly opposite each other.
Because modern vehicles use so many electronics to control the engine with things such as crank and camshaft timing sensors, technicians need to be, as we say in the industry, “dead-on” with the timing belt alignment. The cam gear cannot be off by even a tooth, or the engine will set a DTC.
How can you turn the cam without turning the crank?
I always though you turned the crank with a breaker bar until the cam gear was in line, then take the chain off and turn the crank until it is in line. They should line up at 6 for the cam and 12 o clock for the crank. Ok thats how I have done it 3 TIMES… (its really making me mad if u cant tell, lol).
What happens if the timing is not set properly?
When he timing is not set properly the car may experience hard starting, low power or bad gas mileage. Setting the timing is normally an easy task, but sometimes the manufacturer’s timing marks are missing or damaged.
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 are the bright links on a timing chain?
Locate marks or “bright” links in your timing chain. These links are brighter than the other links and are used to align your engine. Set your engine to top dead center. To get your engine to top dead center, line the bright links on the timing chain up with the marks on your camshaft and crankshaft gears.