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Lynn

Lynn 7/10/2011

1998 Dodge Caravan Base 6 Cyl 3.00L

Engine

can motor be fixed after timing belt goes bad, while vehicle was being driven?

3 Answers


Bill

Bill 7/10/2011

I am afraid your vehicle has an interference type engine. What does that mean?
An interference engine is a type of 4-stroke internal combustion piston engine. Depending on the design of an engine, piston and valve paths may "interfere" with one another as a result of incorrect timing in their movements. (Such designs are also called "interference head" or "non-freewheeling", and include virtually all diesel engines. Conversely, non-interfering engines, such as the Mazda B engine, are called "free-wheeling" or "non-interference" engines.)

In piston engines using poppet valves, the valves descend into the combustion area at the top of the cylinder, while the pistons rise into this area from below. If the lowest point of a valve's descent is lower than the highest point that the piston reaches, the engine is considered an interference engine. In normal operation, the relative timing of the valve and piston's motion prevents them from colliding, but if the valve timing is altered through wear or improper adjustment, or if a timing belt breaks or one of the pulleys the timing belt rides on (often including the water pump) fails, one or more valves may be placed in the path of a piston.
In other words when belt broke it could have damaged other internal parts in engine, The Dodge Caravan 3.0 liter V-6 through year 2000 had still used this type of engine.

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HouseCallAuto

HouseCallAuto 7/10/2011

Uh, Bill? This engine is a zero-interference engine. No damage to valves can happen if the T belt breaks. Absolutely, cannot happen no matter what speed.

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HouseCallAuto

Lynn 7/11/2011

so are you saying yes I can replace the timing belt and it should be ok?

HouseCallAuto

HouseCallAuto 7/11/2011

Yes, you can replace the belt and it will be OK.

HouseCallAuto

Bill 7/11/2011

MY phopaw if correct. If you say Ok then it must be. :) Sorry about that.

HouseCallAuto

Bill 7/11/2011

This is where I double checked my information HCA . How to replace a timing belt on 1998 dodge caravan on E How.com

HouseCallAuto

HouseCallAuto 7/11/2011

The link below is one of 5 I looked at that all say non-interference. Additionally, I, in my 36 years have never had a single 3.0 with a broken belt ever present bent valves. I would say that the link below to Gates timing belts would carry the heaviest influence. I do see that E-How has incorrect information. You are off the hook on this one :-) Bill.
http://www.gates.com/part_locator/index.cfm

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HouseCallAuto

Bill 7/12/2011

GOOD THING, I hate it when I'm on a hook :) LOL

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