Symptom: perhaps due to design reasons, the Honda Accord sedan on the pump more easily than other vehicles early damage, resulting in water temperature is too high. And after changing the pump, the engine vibration and noise, often causing dissatisfaction with the customer.
    Troubleshooting: Why for the pump, the engine will increase for no reason vibration, noise becomes bigger?
    In the replacement of the pump must be removed when the timing belt, and some Honda Accord cars timing belt and other models of different. It has not only other models have camshaft timing belt, there are general models do not have the balance axis timing belt. And adjust the balance axis timing method and the general method of adjusting the timing of the camshaft is different, easily lead to balance axis timing error, the final performance of the engine balance deterioration and vibration intensified. At the same time, due to the balance axis timing belt in the unbalanced state of operation, resulting in periodic noise, so that the engine noise becomes larger.
    General engine in order to simplify the structure, with a balance block to solve the engine balance problem, and the pursuit of perfect Honda, in addition to balance with the block, but also uses a relatively complex double balance shaft structure; in order to reduce the engine vibration. The double balance shaft is driven by the balance axis timing belt, and the timing method at the time of installation has its particularity, as shown in Fig. When the balance shaft is in time, remove the bolt 8 and insert it into the hole with a length of 140 mm and 10 mm bolts 9 and turn the corresponding balance shaft until 9 is set in the shaft hole, indicating that the time point has been reached and the timing After the belt 9 removed, and then installed on the 8 can.