Volvo D5252T
2.5 L · inline-5 · turbocharged · diesel · 1995–present
Also known as: d5252t, d5252, 2.5 tdi volvo, volvo 850 diesel
The 2.5 turbodiesel in the Volvo 850, S70 and V70.
⚑ It is a VM Motori engine, not a Volvo one, and the catalogue's own rows say so. That matters because the later D5244T five-cylinder — the engine most people mean by a Volvo diesel — is Volvo's own and shares nothing with it. Two five-cylinder diesels, two companies, one marque.
It is an indirect-injection engine with a mechanical pump: no common rail, no particulate filter, nothing to regenerate. Almost every modern diesel complaint is inapplicable.
Its known weakness is the cylinder head, and specifically that VM used individual heads per cylinder — an unusual design that makes a head gasket failure a different and more involved job than on any other engine in this catalogue. Coolant loss with no external leak is the tell, and the repair is not the routine one.
Parts and specialist knowledge are both very thin now, which is usually what decides whether one of these cars is worth keeping.
Cars fitted with this engine
2 generations, across 1 make. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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