![]() Timing belts are typically located in front of the engine and are often behind a cover for protection against dust and debris. Replacement of the engine's water pump at the same time is often recommended, since the water pump is also subject to wear and easily accessed during the replacement of the timing belt. The main disadvantage is that belts wear over time, therefore belt replacement is recommended at specific intervals. ![]() ![]() The advantages of timing belts are typically a lower cost, reduced friction losses, less noise and that belts traditionally do not require lubrication. The phrase "timing belt" usually refers to a rubber toothed belt. Timing belts were common on mass-production cars until the 1970s and 1980s, however since the 1990s timing chains have become more common due to the replacement intervals required when using timing belts. Overhead camshaft engines mostly use timing belts or timing chains, since these are better suited to transferring drive over larger distances. In many older overhead valve engines, the camshaft is located in the block near the crankshaft, therefore a simple gear system is often used to drive the camshaft. The teeth of the belt/chain/gears mesh with both the crankshaft and camshaft(s), thereby synchronising their motion. The most common devices to transfer the drive are toothed rubber belts, metal timing chains or a set of gears. These valves allow the engine to inhale air (or an air/fuel mixture) and exhale the exhaust gasses. The crankshaft drives the camshaft (via a timing belt, timing chain or gears), which in turn actuates the intake and exhaust valves. In most piston engines, the camshaft(s) are mechanically connected to the crankshaft. This synchronisation ensures that the engine's valves open and close at the correct times in relation to the position of the pistons. In a piston engine, either a timing belt (also called a cambelt) or timing chain or set of timing gears is used to synchronize the rotation of the crankshaft and the camshaft. The torque specification is 28lb/ft and be sure to retain the factory washer that's sandwiched between the oil pump and your billet tensioner bracket.A timing chain (installed around the two circular cam sprockets) You will also want to apply some common grease to the shank of the bolt which holds the tensioner to the oil pump and a dot of blue Loctite on the threads of the bolt to keep oil from seeping out of the engine, as its retaining hole is through-hole. If the valve tip were to break off it can damage the combustion chamber, piston and other various components as well.ĭuring installation, the lock washer on the idler pulley will be deleted and we recommend a drop of red Loctite in its place. ![]() If the bolt or belt break during operation, the majority of aftermarket camshafts will cause the pistons to hit the valves, bending or breaking them and requiring a cylinder head overhaul. Once this happens the timing belt itself can fail, or the bolt can fail as the movement of the engine can cause the bolt to break. While there are many well constructed aftermarket unbushed steel tensioners on the market, when used for a long service interval - as you would find on a street car or road race vehicle, over time the lubricant used during installation will be displaced and the bolt can fuse to the tensioner. They will continuously wear and eventually they will interfere, bind, and seize. Galling is wear caused by adhesion between sliding surfaces. The bronze bushing is of paramount importance due to the susceptibility of like-material galling. All tool paths in our tensioner have the longest possible radii to make the part as strong as possible while still fitting in the OEM location. It is constructed out of 6061 Aluminum and utilizes an oil impregnated bronze bushing, as well as a steel insert for the factory hydraulic belt tensioner to ride on. Introducing the new Real Street Performance 2JZ Billet Timing Belt Tensioner Bracket (Part Number: RS02-0002).
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