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Expert: sprinkles08 replied 4 years ago. Hello and welcome to JustAnswer! Yes, the 3.3 and 3.8 are interference engines. They have a timing chain instead of a timing belt though, I've never seen or heard of a timing chain breaking on a 3.3/3.8 and causing any valve damage.sprinkles08, Chrysler/Dodge/Jeep master tech.Category: Dodge.xpert: sprinkles08 replied 4 years ago. Hello and welcome to JustAnswer! Yes, the 3.3 and 3.8 are interference engines. They have a timing chain instead of a timing belt though, I've never seen or heard of a timing chain breaking on a 3.3/3.8 and causing any valve damage.
1993â97 3.5 L engines are a non-interference engine meaning that the valves will not collide with the pistons in the event of a timing belt failure. The 1998â2001 3.2 L, the 1998â2010 3.5 L, and the 2007â2011 4.0 L engines are interference designs.his provides better low and midrange torque. The four valves per cylinder are driven by a single overhead camshaft as opposed to the conventional DOHC arrangement for multivalve engines. Another difference with the 3.5 as opposed to the 3.3 is that it has a timing belt, not a timing chain.