If you are replacing it with a stock Toyota engine it should not be an impossible task, since the six is the larger engine option anyway. However, it will involve SOME
modifications such as new engine mounts, exhaust hookup - etc. The remainder of the engine compartment "accessories" should be standard all across the Toyota line and be no real trouble for a mechanic to install on the new engine.
The 2006 Toyota Highlander has a V6 engine.
4 cylinder engine 4qts V6 engine with filter change 4qts Inline 6cylinder engine 6qts
The 2006 Toyota Highlander has a 3.3 L base engine size.
4 cylinder engine: 3,000 lbs - - - 6 cylinder engine: 3,500 lbs.
Both the 2.7 liter four cylinder engine and the 3.5 liter V6 engine in a 2009 Toyota Highlander have a timing CHAIN
yep, though you may have to replace the mounts.
2006 Toyota Highlander 4 cylinder engine
For the Highlander 4 cylinders, it is on the Alternator side. To replace it, you have to take the alternator out and unscrew two bolds . Unless the engine is rebuilt, thermostat only replaced, most likely, when you rebuild the engine. check cooling tank and water hose leak first.
In a 2004 Toyota Highlander : The 2.4 liter four cylinder engine has a timing CHAIN The 3.3 liter V6 engine has a timing BELT
Can you replace your 2000 Camry CE 4-cylinder engine with a 1997 Camry engine?"
Toyota's website lists the mileage for the Highlander Hybrid at 20 mpg city/ 27 mpg highway for the V6 hybrid engine. The Highlander is also offered in regular V6 engine and 4 cylinder models.
Front of engine left to right 1-3-5 Back of engine left to right 2-4-6 Click the link for a diagram.