Car Repair World

When To Replace Timing Belt Timing belts have replaced timing chains on many of today's engines. Not to be confused with “V-belts” or “Serpentine belts”, which are located on the outside of the motor to drive accessories, timing belts perform a much more vital role. The purpose of a timing belt is to provide a connection between the camshaft and crankshaft to ensure that the pistons and valves operate together in proper sequence. Timing belts have proven to be lighter, quieter and more efficient than chains, but those benefits come at a cost - they require more frequent replacement than chains. Timing belts are used in two types of engines designated as "free-running" and "interference". If the timing belt breaks on a “free-running” design, the engine will stop and you will need a tow to the repair shop. There is enough clearance between the pistons and valves so no mechanical damage usually occurs. The installation of a new belt is usually all that is neede...

Faulty Hose Composition leads to Smelly Audi A4 Quattro wagon  Noticed an odd smell from the car, so he stopped at a shop to get it checked out. He was told that the coolant reservoir was cracked and needed to be replaced. Not satisfied with this diagnosis, he later drove to our shop. We performed a pressure test on the reservoir and discovered that the hose between the coolant reservoir and the engine was weeping coolant through the hose material. If the coolant reservoir appears to be leaking, the technician should also check these possible leak sources before replacing the reservoir. May be caused by the coolant hose (1) between coolant reservoir and radiator or the coolant hose (2) between coolant reservoir and engine which may have internal cracks (Image 19-A116). Internal cracks can cause coolant to get inside the coolant hose material and leak from connections to the coolant reservoir (arrows) due to the capillary effect. The following tools (or equivalents) are require...

2004 Dodge Durango noticed a different kind of pulsation It only would occur when lightly applied the brakes over 60 mph. The vehicle may exhibit pulsation or vibration in the brake pedal and/or steering wheel when the brakes are applied. The condition is most noticeable at speed over 50 MPH but can occur at lower speeds. If the customer indicates that the condition is present, perform the Repair Procedure. The procedure involves installing brake pads, resurfacing the rotors and checking rotor runout. 1 Set of Brake Pads , P/N 05139733AA, will be required to complete the repair. Applicable Vehicles: 2004-2005 Durango (HB) Repair Procedure: (Review safety procedures in the ALLDATAdiy.com ® before beginning) 1. Inspect the front brakes for any signs of abnormal wear or damage. Repair as necessary. 2. Resurface the front brake rotors with a Chrysler® approved on-car brake lathe. If an on-car lathe is not available, the rotor resurfacing must be sublet to a facility with an approved on...