How does variable valve timing work in a VVT?
The VVTs first generation uses a two-step variation that boosts the performance at two different RPMs. The first variation of valve timing is fixed for up to 3500 rpm and the other phase is the one with full load for more than 3500 rpm. (low and medium cam profile)
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.
How does the swivel action of the cam PHAs-ER work?
The swivel action of the cam phas- er, which is identified in the service manual as a camshaft position actuator, is accomplished via oil pressure applied by an oil control solenoid into the actua- tor’s piston located in the hub of the camshaft sprocket.
What is the difference between VVT and VVL?
One of the innovative advancements that brought a drastic change to the industry is the VVT (Variable Valve Timing) and VVL (Variable Valve Lift). Many of the vehicles, some even on the Indian road come with the engine running VVT, VVL or both the techs. But what exactly are VVT and VVL? How does it help? and How does it work?
How do you set the timing on a VVT?
2) install VVT with the pulley turned full-COUNTER CLOCKWISE (bolts far right in oval). Timing mark 1 tooth before timing cover 4) Turn the pulley so that the timing mark aligns with timing cover (1 tooth) CLOCKWISE
How do you set the CVVT on a Volvo?
Lock the cams in place and make sure the crank shaft marks are correct. Line up the intake cam to the timing cover, then rotate the CVVT hub clockwise to see where your current timing marks align. This will tell you how far forward/back you need to adjust the hub. Remove the center bolt and rotate the hub as necessary.
Do you need the Volvo Cam setting tool?
If you are pulling the VVT gear off, you will need to be sure the cam doesn’t move, and that requires the Volvo cam setting tool. Otherwise, you cam could be about anywhere and you’ll get a CEL because you are at least a tooth off of where you should be.
How to tell if variable valve timing is malfunctioning?
How to determine if the Variable Valve Timing (VVT) System is malfunctioning? The check engine light (CEL) will be activated when the powertrain control module (PCM) detects unordinary engine conditions.