How many kilometers does the engine timing chain need to be replaced? Or do you never need to change it? The repairman will inform you on site

Today, I just dismantled a chain machine. I didn't expect this most durable chain machine? It's actually broken too. This is a B12 engine with dual camshafts, not disassembled, but can friends see this chain? It's very loose. Let's open the front cover and see what's causing the chain to break inside. Under normal circumstances, if the gap becomes larger and causes tooth jumping again, the engine is likely to be scrapped.

So, this chain engine doesn't necessarily have to be more durable than a real engine. If it's not well maintained, the chance of it breaking down is even greater. Let me take it apart first and see what caused it. Is it a human error or a problem with the engine itself? As you can see now, we just opened the valve cover, and its way out is at this position where the chain is very loose. Fortunately, the car owner has been driving for several days and said he missed me. Please open it quickly, and he said he can wait for another two days. I really can't wait anymore.

When opened, this chain is so obvious that we can almost see it. If the teeth of this wheel are wrong, it will instantly cause this timing misalignment, which may lead to the direct scrapping of the engine. Let's quickly open this front cover, and you can see if the guide plate is broken, the tensioner is broken, or the chain is pulled due to insufficient oil, all of which can be seen. We have now dismantled all the screws, and now we can see that the direction of the lid inside is very large compared to our husband's appearance. Let's take a look and see if the chain stopper is on both sides together, and one on each side is a stopper for the chain

It's chain waste. Overall, this chain is not damaged, and the tensioner is also not damaged. It is stretching and retracting normally. In this situation, it is obvious that the chain is elongated. What is the main reason? It's still that car owners don't change this type of oil so frequently. Additionally, the wear of the engine itself is not resistant to wear, resulting in the overall elongation of the chain and the wear of the cracked teeth, which is why the chain is so loose

Why is it said to be scrapped? We can see from this position that this is the entire crankshaft, and the lower part is connected to the piston, which is a small bearing. When it rotates? This piston moves up and down, but if the bottom and top cannot synchronize and are not on the timing, if I go up again, it will directly destroy the valve, so it is very dangerous. This car is just one step away from danger, and we can see that when we rotate, the bottom shaft and top shaft are synchronized, but it's okay.

Just like this, when the engine is working, it is also easy to cause sunlight. Every time? It will have an impact like this, so it's really dangerous to be just one step away from non-stop. If we were to replace it now, we would need to replace this wheel, as well as the entire chain, including this chapter, because this is a replacement set, and if it breaks down, the effect will be better.

If it is a timing belt, this is a belt. I have told us that it must be replaced before 100000 kilometers. If the timing belt is replaced, it is not such a hassle. It is very simple, and we can handle it in the car in two hours. If we change this chain, what do friends think? We need to remove the entire engine, which means it won't take two hours or even a day or two.