How Often Should You Replace Your Timing Belt? | The Family Handyman
Accept you lot ever wondered if information technology'southward time to replace a timing belt? For the answer, mind to your engine and follow your vehicle'south maintenance schedule.
Timing belts themselves are relatively inexpensive but can easily cause thousands of dollars of damage if they break while the engine is running.
Engines come in two configurations: Interference and non-interference. When a timing chugalug fails the camshaft(southward) stops turning and the valves stop moving, but the crankshaft still rotates for a few seconds. An interference engine has insufficient clearance between the valves and pistons. Because the crankshaft keeps rotating, pistons will slam into any valves stuck in the open up position, causing catastrophic engine damage. A timing belt failure in a non-interference engine volition get out you inconveniently stranded.
Timing belts are a maintenance item; they tin can vesture out and fail without warning. Check your possessor's manual. It pays to know which kind of engine you take and the recommended replacement intervals.
What Is a Timing Belt?
A timing belt is similar to an engine drive chugalug, except timing belts have teeth. In many engines, timing belts take replaced metallic timing chains (like to a bicycle chain) connecting the camshaft and crankshaft gears. The camshaft and crankshaft must piece of work in perfect harmony, called valve timing, during the four-stroke combustion cycle (intake, compression, power, exhaust).
Engines using timing chains can also be interference or non-interference engines. Timing belts are usually molded from rubber or neoprene, have strong fibers or steel running the length of the belt (similar to a tire) and produce less noise than metallic timing chains. This makes them strong and durable. But they don't last forever.
How Can You Tell a Timing Chugalug Needs To Exist Replaced?
Consult a repair manual to run into if y'all tin easily remove the timing belt cover. A repair manual is different from an possessor'due south manual because information technology lists footstep-by-stride repair procedures. Most auto parts stores carry vehicle repair manuals, and many lend them to their customers at no cost.
Many timing belt covers are difficult reach, making visual access to the belt impossible. If you can't go to the encompass without taking half the engine compartment apart, leave it to the pros to determine if your vehicle's timing belt needs to be replaced.
If yous can get to the belt, information technology should be taut, with about a 1/4-in. to ane/two-in. deflection when pressed with your thumb along its longest run betwixt gears. It should be smooth and flat (no rounded edges), not glossy or shiny, have no chunks missing, be free of large cracks or peeling and evidence no signs of fraying. Small surface cracks are okay, only spider cracking on the surface signals farthermost habiliment.
Replace the belt if any teeth are missing or contaminated past an oil or coolant leak.
How Often Should a Timing Belt Be Replaced?
There is no simple reply. Beginning, cheque your owner'southward manual for the recommended maintenance schedule. Some manufacturers recommend replacing the timing belt every 30,000 miles, while others suggest 120,000 miles. Several other factors should be office of the equation when considering replacing a timing chugalug, including:
- Engine functioning I: A poor running engine could indicate a loose timing belt skewing engine valve timing.
- Engine performance 2: Engine misfire from a bad spark plug wire or ringlet places undo stress on a timing chugalug, shortening its life.
- Clicking or squealing noise from the front of the engine: Missing teeth tin can crusade a timing belt to make a clicking racket. A weak or defective timing belt tensioner or glazed idler pulley will produce high-pitched squealing, rattling or squeaking noises.
- Driving conditions: Lots of metropolis stop-and-go driving, heavy acceleration and extreme temperatures place additional stress on timing belts.
- Common sense: If you lot buy a used car with more than l,000 miles and the seller cannot show proof the timing belt was ever replaced.
How Much Does DIY Timing Belt Replacement Cost?
Timing belt replacement should be left to the pros. It can exist complicated to replace the timing belt on most engines, especially those with dual camshafts or lots of bulldoze accessories that need to be removed.
In many cases, special tools are needed to correctly install a timing belt. Plus, other parts may need replacing. Timing gear indexing (precisely adjustment the camshaft gears and crankshaft gear to the manufacturers specs) is critical. Even if i gear is one tooth "off," engine valve timing will exist out of sync, dissentious your engine or causing it to run crude.
However, if you insist on replacing a timing belt yourself:
- Review a repair manual earlier starting and keep it handy.
- Ensure yous have the correct tools, including any specialty tools needed to adapt the chugalug tension to eliminate chugalug deflection.
- Ready aside an unabridged twenty-four hour period.
- Plan to replace the drive belts ($25 to $75), change the motor oil and filter ($15 to $fifty) and, if replacing the water pump, flushing the cooling organization ($x to $45).
It pays to buy a timing belt kit rather than the private items. Depending on the specific make and model, a typical timing chugalug kit ($100 to $500) includes a timing belt, timing chugalug tensioner, idler gears or pulleys, water pump, gaskets, O-rings and seals and other hardware.
Whether you or your mechanic replaces the timing chugalug, it'southward ever a expert idea to replace these other components at the same time.
How Much Does Professional Timing Chugalug Replacement Cost?
The price the pros charge to supersede a timing belt ($350 to $one,500) varies depending on the engine, make, model and year. It also matters whether an independent repair store or dealer'southward service department makes the repair.
Source: https://www.familyhandyman.com/article/when-to-replace-your-timing-belt/
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