Is engine leakage difficult to repair? Looking at the disassembled engine and gearbox, the car owner understood

A Cheetah car arrived at the store in 2018, and the owner described the problem as: the antifreeze is always lacking and has been added multiple times. See where the problem lies.

The master first opened the engine hood, and the antifreeze in the antifreeze pot was indeed lacking. After checking the antifreeze pipes, water tanks, and other components that are prone to problems, there were no issues. However, many traces of antifreeze leakage were found on the cylinder block, which is relatively rare!

After lifting the car up and confirming again, the master told the owner that the problem of leaking antifreeze in your car is difficult to fix and very special. It requires removing both the engine and gearbox to repair, which is very difficult!

Can't the car owner repair it without dismantling the engine and gearbox? The master is very certain that it cannot be done. Now let's take a look at what's going on through a set of pictures.

As shown in the picture below, the engine and gearbox have been removed, leaving the cabin empty.

As shown in the figure below, this is the disassembled engine and gearbox assembly. The engine has a 1.5-liter displacement with turbocharging, and the gearbox is of CVT type.

Looking at the turbocharger side, which is the exhaust manifold side, there are many blue marks on the cylinder block, which are signs of antifreeze leakage.

After removing the turbocharger and exhaust manifold, the specific situation of water leakage can be seen.

This sensor is a knock sensor, there are very obvious rust marks on the outer side of the water blockage

Among the three water blockages on this side of the intake manifold, two are particularly leaking and the other is severely rusted.

The master said that the engine cylinder block is made of cast iron material, with three on the turbocharger side, three on the intake manifold side, and one at the rear of the engine, which is on the transmission side, as shown in the figure below, located exactly at the fixed position of the transmission! The master also said that the water blockage and leakage are very serious. The leaked water directly enters between the engine and gearbox, and obvious signs of leakage can be seen at the bottom.

The master used a connecting rod to knock the new water plug into the cylinder block, and a thin layer of sealant was applied to the side of the water plug. We looked at the installed water plug, and the master said that this would prevent further leakage.

Why does water blockage corrode like this? The master said that it is likely because the quality of the antifreeze is too poor and the corrosiveness is too strong. Good antifreeze has anti rust function and this situation is unlikely to occur.