Interference or Non-Interference Engine

[TheMaskedMan]

Is the engine in a 2007 Yaris a interference or non-interference engine?

[clayky]

Is the engine in a 2007 Yaris a interference or non-interference engine?

Probably interference being it's chain-driven. On the other hand I doubt you'll ever have to worry about it.

[PetersRedYaris]

Why do you wonder? Chain driven or belt driven has nothing to do with it being interference or non-interference as both can be either. Most modern engines are interference, however, I wouldn't worry about it. The yaris is chain driven with no scheduled maintainance.:smile:

[Kitt]

has anyone ever wonder why did they designed it chain driven? nothing against that of course... just wondering...

[acrbill]

With 10.5:1 compression its a safe bet to say its interference.

[Moose]

It's interference.

Chain driven engines are more reliable (especially with variable timing setups) and cheaper to maintain than belt driven engines.

[jdubau55]

Unless the chain breaks at highway speeds....then you're screwed.

[Kitt]

that must hurt

[fu_im_from_texas]

Before this I had a '94 geo prism (toyota corrolla). The timing belt had to be changed every 60k miles, and the water pump failed at 60k intervals too.

[tekmoe]

Before this I had a '94 geo prism (toyota corrolla). The timing belt had to be changed every 60k miles, and the water pump failed at 60k intervals too.

yeah, my 86 gti had a timing belt. never again will i own a car with a timing belt. :thumbdown:

chain driven all the way! :thumbup:

[PetersRedYaris]

I wouldn't have bought a Yaris if it had a timing belt. Low maintainance was a big selling point for me. Timing belts are a scam IMO. It pisses me off how a car company can design a car with a $500-$600 60,000 mile belt change. Toyota is of course not that expensive as they are the only company to offer flat rate timing belt changes depending on 4, 6, or 8 cylinder. I've owned Mitsubishi (Montero) and Nissan (Pathfinder) vehicles and $700 is not uncommon for a T-belt service. I get angry just thinking about it.

[TheMaskedMan]

How often do you have to change the chain? and if it breaks are you screwed like you would be if a belt broke?

[Nautical Yaris S]

no timing chain maintenece is listed in the owners manual.

think of the older cars from the 60s and stuff. those engines still run w/ no overhaul because they all have chain-driven cams. unless the chain goes out of tolerence and skips a gear, you are fine. but i cannot see that happening unless you are running 22lbs of boost, or a 200 shot of Nitrous... bboth of which would blow the bottom end before the timing chain broke :)

[PetersRedYaris]

How often do you have to change the chain? and if it breaks are you screwed like you would be if a belt broke?

Never, NO scheduled maintainance. IF it broke, yes, you would be screwed. I have NEVER heard of that happening on a Toyota, however.

[redyaris]

OMG...no timing belt change required?!?!?!? There is a GOD!

It just gets better and better. Im glad I bought this little car.