Does Mazda have VVTI?
In 2010, Ford introduced a GDI turbo variant of the Mazda LF engine design as the EcoBoost 2.0L, using Ford’s own manifold and engine control systems….
| Mazda L engine | |
|---|---|
| Valvetrain | DOHC 4 valves x cyl. with VVT (some versions) |
| Compression ratio | 9.7:1, 10.0:1, 10.8:1, 12.1:1 |
| Combustion |
What are the actuators used in VVT i system?
VVT-i actuator. 1 – housing, 2 – rotor, 3 – lock pin, 4 – sprocket, 5 – camshaft, 6 – auxiliary spring. ECM controls the oil flow to advance and retard chambers by solenoid, based on the signals of the camshaft position sensors. When engine stopped the valve spool is moved by spring to ensure maximum advance angle.
How to replace the VVT on a Mazda CX-7?
Now install the timing chain and tensioner. Pull the locking pin from the tensioner and pull the timing chain tight. Now torque the center bolt on the VVT sprocket while holding the camshaft with a wrench on the hex shape built into the center of the camshaft. There is NO special spot that the VVT has to be aligned on the camshaft.
Are there any problems with the Mazda CX-7?
The Mazda CX-7 definitely had its fair share of engine problems, and it all starts with the turbocharger. According to Consumer Reports, there is a long list of problems with the engine.
Are there any problems with the Mazda VVT?
Automakers all use a variety of VVT systems, but they all come with one thing — complexity. In Mazda’s case, a defect with the VVT has been known to lead to specific and costly problems:
Why does my Mazda VVT make a rattling noise?
When first starting the engine, a loud ticking can be heard from the VVT. This is due to wear and tear on the VVT. While driving (under 2,000 RPM), excessive stretching of the timing chain can cause a knocking / rattling noise. Left untreated these problems can lead to oil leaks, stretched out timing chains, and catastrophic engine failure.
Now install the timing chain and tensioner. Pull the locking pin from the tensioner and pull the timing chain tight. Now torque the center bolt on the VVT sprocket while holding the camshaft with a wrench on the hex shape built into the center of the camshaft. There is NO special spot that the VVT has to be aligned on the camshaft.
Automakers all use a variety of VVT systems, but they all come with one thing — complexity. In Mazda’s case, a defect with the VVT has been known to lead to specific and costly problems:
What happens if Mazda refuses to repair variable valve timing?
The extended warranty means nothing if Mazda refuses to do the repairs. In August, 2014, Mazda was sued for refusing to repair continuous variable valve timing assemblies in its L-Series engines. According to the lawsuit: The defect can cause the timing chain to detach and destroy the engine
How to replace the variable valve timing actuator?
When newly replacing the variable valve timing actuator, place alignment marks on the new part in the same position as the old actuator. If the alignment marks on the variable valve timing actuator are not available, refer to the “timing chain ASSEMBLY” in the engine and perform the sprocket position alignment again. . .. . Thank you.