Untimely failure of a rubber timing belt can simply value two or three thousand of repairs, probably together with a brand new engine. Due to this fact figuring out the true mileage of a used automobile is crucial. Off lease Automobiles having four or 6 cyl. engines could have rubber timing belts and must be prevented.
5 years in the past a global oil firm survey discovered that 50% of off-lease vehicles had their odometers illegally turned again and steered customers keep away from shopping for off-lease (used) vehicles, or leasing used vehicles having unsure mileage. If the vehicles actually had 50,000 miles, and the odometer learn 30,000, then the timing belts would fail lengthy earlier than the brand new homeowners anticipated them to fail LS swap alternator.
What’s an “interference engine”?
Rubber timing belts are often utilized in “interference” engines by which the
valves open additional and venture additional into the combustion chamber than in a “free-running” engine. This permits exterior air at atmospheric strain to move sooner into the combustion chamber by way of the bigger valve openings, permitting the engine to inhale extra air, be smaller and nonetheless create as a lot energy whereas decreasing its manufactured value and guaranteeing future restore enterprise for the seller.