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Why, after replacing the expansion tank cap, the problems with the cooling system begin

  • August 22, 2023
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Many motorists are familiar with the situation when, after replacing such a trifle as an expansion tank plug, the car has problems. It even comes to the point

Why, after replacing the expansion tank cap, the problems with the cooling system begin
Many motorists are familiar with the situation when, after replacing such a trifle as an expansion tank plug, the car has problems. It even comes to the point that the rubber tubes simply burst, which leads to antifreeze leakage. The AvtoVzglyad portal tells about the causes of problems.

For example, the problem is known to the owners of UAZ Patriot. It seems that they are constantly doing their best to make the lucky owner of an SUV suffer. The fact is that the cover is not just a plastic part. It has two valves – safety and vacuum. The Patriot has a situation where the nominal pressure at which the safety valve opens does not match the calculated pressure. As a result, the air does not leave the system and the pressure slowly but surely rises.

From this, rubber pipes become covered with cracks, or they simply tear, and the plastic tank is bursting at the seams. Drivers act drastically and change the tank to a foreign car. Or insert a soft metal tube into the neck. It acts as a spacer and protects the loose cap from coolant splashes that constantly occur in the tank.

Other cars have the same problem. Often they arise from ignorance of the owner. Let’s say someone changed the lid to a nicer lid. The result – the antifreeze boiled, the engine overheated, or in general it came to a burnout of the cylinder head gasket.

The reason is that this cover should not be selected based on color or shape, but based on the workload in the car system. Here are online forums to help. There is a lot of information and all the technical data.

Of course, you should definitely buy a quality product, but this is the problem. There are a lot of spare parts, but good ones – the cat cried. In the car market you can buy a new part that completely ceases to hold pressure and twists very much, or the plastic is deformed after the first heating. In both cases there is a risk of overheating.

Other plugs do not fit into the thread at all. So it is better not to choose a cheap Chinese name, but the original. To be honest, let it be expensive. In any case, overheating the engine costs a lot of money.

Photo: www.allstate.com

For example, the problem is known to the owners of UAZ Patriot. It seems that they are constantly doing their best to make the lucky owner of an SUV suffer. The fact is that the cover is not just a plastic part. It has two valves – safety and vacuum. The “Patriot” gets a situation where the nominal pressure at which the safety valve opens does not correspond to the calculated one. As a result, the air does not leave the system and the pressure slowly but surely rises.

From this, rubber pipes become covered with cracks, or they simply tear, and the plastic tank is bursting at the seams. Drivers act drastically and change the tank to a foreign car. Or insert a soft metal tube into the neck. It acts as a spacer and protects the loose cap from coolant splashes that constantly occur in the tank.

Other cars have the same problem. Often they arise from ignorance of the owner. Let’s say someone changed the lid to a nicer lid. The result – the antifreeze boiled, the engine overheated, or in general it came to a burnout of the cylinder head gasket.

The reason is that this cover should not be selected based on color or shape, but based on the workload in the car system. Here are online forums to help. There is a lot of information and all the technical data.

Of course, you should definitely buy a quality product, but this is the problem. There are a lot of spare parts, but good ones – the cat cried. In the car market you can buy a new part that completely ceases to hold pressure and twists very much, or the plastic is deformed after the first heating. In both cases there is a risk of overheating.

Other plugs do not fit into the thread at all. So it is better not to choose a cheap Chinese name, but the original. To be honest, let it be expensive. In any case, overheating the engine costs a lot of money.

Source: Avto Vzglyad

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