Author: Four Seasons Italy

Air-cooled vs water-cooled intercooler

Changes in the vehicle parc are reshaping aftermarket catalogues, even within well-established product families. The intercooler is a good example. Alongside traditional air-cooled units, liquid-cooled intercoolers are becoming increasingly common. This is a more recent solution, used mainly on the latest generation of turbocharged engines, and it works on a different principle.

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Technical Notice FT106001M

Demand for the product in question as a replacement part is very high. We therefore analyse the causes that lead to the replacement of the thermostat housing, both in general terms and specifically in relation to the PSA 2.0 HDi engine with code DW10.

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Expansion valve

Despite its compact size, the thermal expansion valve is a key component of the air conditioning system: it precisely regulates the flow of refrigerant into the evaporator, where the fluid changes from liquid to gas, absorbing heat and cooling the air. It also separates the high and low pressure sides, helping to maintain overall system efficiency.

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System Cleaning

When a compressor reaches the end of its service life or suffers a mechanical failure, it releases metal particles, Teflon residues, and contaminated oil into the circuit. These contaminants spread throughout the entire system.
The difference between a long-lasting repair and one that brings the vehicle back to the workshop after a few weeks often lies here: in proper system cleaning.

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O-rings and gaskets

When replacing a component in the engine cooling or air conditioning system, attention is often focused only on the main part.
Radiator, condenser, compressor.
However, there is a much smaller element that determines the sealing of the entire system: the o-rings and gaskets.

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Galvanic corrosion

When a radiator shows micro-perforations, the first reaction is often to assume a manufacturing defect. In most cases, however, this is not the issue.
Stray electrical currents generated by poorly insulated grounds or faulty electrical components can trigger galvanic corrosion.
The result is localized and premature perforation of the fins or tubes.

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