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Interferance Engine V.S. Non-Interferance Engine


Here at NW TEAM Yota we work on both "interference" and "non-interference engines.

What does this mean?

Interference engines are 4-stroke internal combustion engines. The design of an engines piston and valve paths determine whether it is an “interference” engine or a “non-interference” engine.

If the lowest point at which an engines valves decent is lower than the highest point the engines pistons rise, then the engine would be consider to be an interference engine. While operating under proper conditions the timing of the pistons and valves is such that they are prevented from colliding. If, for any reason, the timing of an interference engine is not correct, then one or more valves may make contact, which will result in extensive engine damage and therefore costly repairs. Toyota 20R, 22R, 22RE, 22RET, 2RZ-RE, 3RZ-FE engines are all chain driven interference engines. The 5VZ-FE and the 3VZE is a belt driven non-interference engine. Therefore the valves can not come in contact with the pistons if the timing is not correct.


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Vancouver Toyota Service

    5813 NE Landerholm Rd
    La Center, WA 98629
    Phone: (360) 747-7402

    Located in La Center, Washington just off of I-5 30min North of Portland OR.

    We specialize in Toyotas and Toyota vehicles exclusively. We have been serving Portland, Vancouver and the surrounding communities of Orchards, Battle Ground, Brush Prairie, Hockinson, Camas and Washougal for many years.

    Because our sales staff specialize exclusively in Toyota parts we have built a national repution and loyal customer base that regularly contacts us for parts from around the country, from Seattle, to Miami.

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