Unboxing of the Volvo D7D Engine
In a world of increasingly complex technological solutions, the Volvo D7D engine stands out as the last bastion of reliability and solid construction. In our latest video, we take a close look at it – join us for the unboxing of this exceptional power unit.
A Design That Still Impresses
The Volvo D7D is an engine that, contrary to appearances, has a lot in common with Deutz units – their design was the starting point, and Volvo made modifications tailored to its own needs. What distinguishes this unit?
- Fuel system based on pumps with additional coils.
- Fuel dosing control via a fuel rail and computer, without Common Rail technology.
- Traditional injectors and classic control via the camshaft.
All of this makes this engine the last representative of solid, analog solutions.
Refined Design and Sensor Precision
Although the D7D is a mechanical design, it is not lacking in sensors – especially in versions with crawler excavators:
- Intercooler, turbocharger, and intake manifold form an advanced intake system.
- Revolution sensor at the oil pump allows for precise control of engine operation.
- The engine breather is connected to the intake manifold – to meet ecological requirements.
Thanks to this, the engine was ready for new challenges, while not losing its classic soul.
Why Avoid the Successor – Volvo D7E?
In the material, we also compare the D7D with its successor – the D7E engine, which has been equipped with a Common Rail system. Unfortunately, with this modernity came problems:
- Cylinder sleeves drop in the block, leading to burning of the head gaskets.
- There are compression blow-by issues into the cooling system.
- Durability and reliability are no longer at the same level.
In the video, we show exactly what this flaw entails – using another, but very similar engine block as an example.
Summary: The Last "Good" Volvo Engine?
The Volvo D7D engine is a design that still gains recognition from mechanics and heavy machinery operators. It combines mechanical solutions with basic measurement, while avoiding typical problems associated with Common Rail.
