When it comes to engine components, one question that often arises is whether timing chains require replacing or if they last the lifetime of a car. Unlike timing belts, which typically have a recommended replacement interval, timing chains are designed to be durable and long-lasting. However, like any part of your vehicle, timing chains can still experience wear and may eventually require replacement.

A normal result is 4 red blood cells per high power field (RBC/HPF) or less when the sample is examined under a microscope.

A clean-catch urine sample is needed. The clean-catch method is used to prevent germs from the penis or vagina from getting into a urine sample. To collect your urine, your health care provider may give you a special clean-catch kit that contains a cleansing solution and sterile wipes. Follow instructions exactly so that the results are accurate.

Krishnan A, Levin A. Laboratory assessment of kidney disease: glomerular filtration rate, urinalysis, and proteinuria. In: Yu ASL, Chertow GM, Luyckx VA, Marsden PA, Skorecki K, Taal MW, eds. Brenner and Rector's The Kidney. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 23.

The example above is a common measurement for a result of this test. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test result.

A random sample of urine is collected. Random means that the sample is collected at any time either at the lab or at home.

Despite their durability, timing chains can still wear out over time. Common symptoms of timing chain wear include rattling or clicking noises coming from the engine, rough idling or misfires, and decreased engine performance. If you experience any of these symptoms, have your timing chain inspected by a professional technician at our auto service shop.

Krishnan A, Levin A. Laboratory assessment of kidney disease: glomerular filtration rate, urinalysis, and proteinuria. In: Yu ASL, Chertow GM, Luyckx VA, Marsden PA, Skorecki K, Taal MW, eds. Brenner and Rector's The Kidney. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 23.Lamb EJ, Jones GRD. Kidney function tests. In: Rifai N, Chiu RWK, Young I, Burnham CD, Wittwer CT, eds. Tietz Textbook of Laboratory Medicine. 7th ed. St Louis, MO: Elsevier; 2023:chap 34.Riley RS, McPherson RA. Basic examination of urine. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 29.

The design of your engine can also impact the lifespan of the timing chain. Some engines are equipped with more durable timing chains or have additional components, such as tensioners and guides, to help maintain proper tension and reduce wear. Engines with poor design or known issues with the timing chain may be more prone to premature failure.

A higher than normal number of RBCs in the urine may be due to:Kidney and other urinary tract problems, such as infection, or stonesKidney inflammation or injuryProstate problemsBladder, kidney, or urinary tract cancer

Riley RS, McPherson RA. Basic examination of urine. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 29.

While timing chains are designed to last longer than timing belts, they are not immune to wear and may eventually require replacement. If your vehicle is experiencing symptoms of timing chain wear or if you're unsure about the condition of your timing chain, schedule a timing chain inspection with The Garage Automotive Solutions.

Harsh driving conditions, such as frequent stop-and-go traffic, towing heavy loads, or driving in extreme temperatures, can put additional strain on the timing chain and contribute to accelerated wear. If you frequently subject your vehicle to these conditions, your timing chain may wear out faster than expected.

A random sample of urine is collected. Random means that the sample is collected at any time either at the lab or at home.A clean-catch urine sample is needed. The clean-catch method is used to prevent germs from the penis or vagina from getting into a urine sample. To collect your urine, your health care provider may give you a special clean-catch kit that contains a cleansing solution and sterile wipes. Follow instructions exactly so that the results are accurate.

Lamb EJ, Jones GRD. Kidney function tests. In: Rifai N, Chiu RWK, Young I, Burnham CD, Wittwer CT, eds. Tietz Textbook of Laboratory Medicine. 7th ed. St Louis, MO: Elsevier; 2023:chap 34.

In many cases, timing chains can indeed last the lifetime of a car without needing replacement. However, there are several factors that can affect the lifespan of a timing chain and increase the likelihood of it needing replacement.

Reviewed by: Jacob Berman, MD, MPH, Clinical Assistant Professor of Medicine, Division of General Internal Medicine, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

Timing chains play a crucial role in the operation of your engine, synchronizing the rotation of the crankshaft and camshaft to ensure proper valve timing. Unlike timing belts, which are made of rubber and have teeth that can wear down over time, timing chains are typically made of metal and are designed to last longer.

A normal result is 4 red blood cells per high power field (RBC/HPF) or less when the sample is examined under a microscope.The example above is a common measurement for a result of this test. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test result.

Proper maintenance is essential for maximizing the lifespan of your timing chain. Regular oil changes are particularly important, as clean oil helps lubricate the timing chain and prevent premature wear. Neglecting oil changes can lead to accelerated wear on the timing chain and other engine components.