The following are the three primary problems you may encounter with the 2.4 EcoTec timing chain. In this article, we shall have an in-depth dive into the timing chain problems. Some issues you may encounter with the 2.4 EcoTec include timing chain problems, excessive oil consumption, carbon build-up, and leaking oil. One thing about this engine is that it doesn't have a long list of troubles. Given its small design, the 2.4 EcoTec produces between 164 and 182 horsepower.Īlthough it is an excellent engine that offers reliable fuel efficiency, the 2.4 EcoTec is an engine like any other, and it's not perfect.Ĭommon Problems with the 2.4 EcoTec Engine The engine is applied in several GM, Chevrolet, Pontiac, Buick, and Saturn vehicles. The last vehicle to use the 2.4 EcoTec was the Polaris Slingshot. If these parts aren’t replaced at the same time as the chain, expect the job to take no more than three hours.General Motors manufactured the 2.4 EcoTec engine from 2006 to 2019. This time includes the time needed to replace other parts, as mentioned above. Someone with limited knowledge will take longer. How Long Does It Take To Replace A Timing Chain?Īn experienced mechanic will take 3 to 4 hours to replace a timing chain. Gears can be stretched slightly too – although rare – so for a cost of $40 per gear, it just makes economic sense to do this. Once the mechanic has access to the chain, you should replace your car’s tensioners, camshaft gear, and crankshaft gear. Labor is the main cost of replacing the timing chain. Other Parts That Need Replacing At The Same Time. If it’s broken, the pistons won’t move, no fuel is burnt, and the car won’t move. Will a Car Run With a Broken Timing Chain?Ī timing chain’s job is to synchronize each piston’s intervals up and down in each cylinder. A stretched chain can cause a cam or crankshaft gear to skip a notch, causing the timing of the engine to get out of sync.
It is possible your car will suffer misfires while driving if the timing between the valves and pistons is wrong, which has a bearing on the engine’s firing sequence. What Happens If The Timing Chain Is Loose? If it’s stretched, it’s best to get the car checked ASAP.Ī new chain, gears, and tensioners will be a fraction of the cost of an engine rebuild if the chain snaps. It may last thousands of miles more or could snap the next time you drive it. Without taking off the chain cover and inspecting the condition of the gear teeth, tensioners, and the chain itself, it’s guesswork. If each stretch 1mm over time, a 1.5 cm increase in the chain length will occur. Not only does this cause slack in the chain, but it also affects the oil pressure. Do you notice any metal fragments in the oil? If the belt is loose, it may be because the teeth on the crankshaft and camshaft are fragmenting. Pull out the dipstick and check the oil on it. This can cause the fuel not to be combusted efficiently and result in it being discharged with exhaust gases through the tailpipe. Excess Exhaust SmokeĪ loose timing chain stops the pistons from working within the cylinder as they were designed to. It’s important to fix the chain as if it does come off the gears it can cause catastrophic damage to your car’s engine. When this happens, it may temporarily cause a reduction in performance until it catches a gear tooth again.Īs time goes on, this erratic performance will increase. If the teeth on the camshaft and crankshaft gears have started to wear because the timing chain is loose, it will slip. In extreme circumstances, you may notice a reduction in miles per gallon of up to 10 miles. If the pistons aren’t working in unison with each other, it’ll result in inefficient fuel combustion. The tensioners won’t be pushed against the chain if the pressure is too low, and the looseness will remain. The tensioner’s job is to ensure that happens, but sometimes they get clogged up with oil deposits, especially if oil filters and oil changes aren’t maintained. There should never be any slack on the chain. The timing chain tensioner is likely faulty as these need oil pressure to maintain the chain’s tightness. Therefore it’s important to get your ear down to the valve or chain cover area to see if the rattle is coming from the timing chain or not. Let’s look at each in more detail Loose Timing Chain Belt Symptoms A Rattle When You Start The EngineĪ rattle on startup could be caused by many parts vibrating in sync with the engine. You’re informed enough to know the risks of driving with a loose or stretched timing chain and are looking for confirmation that the chain is loose.īefore we get into the detail, the loose timing chain signs are
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