How does the CMP actuator control the camshaft? The CMP actuator assembly (15) varies the camshaft position in response to directional changes in oil pressure. The CMP actuator solenoid valve controls the oil pressure that is applied to advance or retard a camshaft. Modifying camshaft timing under changing engine demand provides better balance between the following performance concerns: What kind of actuator is used for VVT? GM’s VVT system uses electro-hydraulic actuators between the drive sprocket and camshaft to twist the cam relative to the crankshaft position. Adjusting the cam phasing in this manner allows the valves Where is the...

When did cars start using timing chains? Timing chains were common on production automobiles through the 1970s and 1980s, when timing belts became the norm, but timing chains have seen a resurgence in recent years. When did Toyota start using timing chains? Between 1990 and 2001 Camrys were all using timing belts. Starting in 2002 the four-cylinder version switched to timing chains while the 6-cylinder stayed on timing belts. By 2007 all Camry models were using timing chains. When do I need to change the timing chain? The timing chain normally needs to be replaced between 40,000 and 100,000 miles...

Can a hot to Rad hose cause an engine to overheat? It cannot cause the engine to overheat. If the hot to rad hose (aka upper radiator hose) is not getting hot, you can consider yourself "lucky", because the problem is almost certainly in the cooling system, and not the engine. Did you uses the correct temperature thermostat when you replaced the thermostat? Can a clogged heater core cause an engine to overheat? If the Hot to h.c. hose is not getting hot, you might have a clogged heater core. Sometimes rust gunk can build up inside the heater core....