Volvo engines and the work we know inside out
Volvos are well engineered, and they reward proper, knowledgeable care. Here is some of what we see day to day across the range, and how we keep these engines and gearboxes healthy.
Drive-E (VEA) 2.0 petrol and diesel engines
Volvo’s modular Drive-E engines power most modern models, from the XC40 and V60 to the XC90, in petrol, diesel and plug-in hybrid form. On the earlier 2014 to 2016 cars we keep a close eye on the timing chain tensioner, where a cold-start rattle should never be ignored, and we carry out chain and tensioner replacement before any damage is done. We also tackle intake carbon build-up on the direct-injection petrols, cooling-system leaks from ageing plastics and seals, and oil consumption, all kept in check with correct-spec oil services on a sensible interval.
Older five-cylinder petrol engines (PCV and cam belts)
The much-loved five-cylinder petrol turbos in the older S60, V60, V70 and XC models are strong engines when looked after. The two big jobs are the crankcase breather system and the cam belt. Volvo uses an oil separator and hose arrangement rather than a simple PCV valve, and when it blocks it raises crankcase pressure and pushes oil past seals, so we service it properly. The cam belt is an interference design, so we replace the belt, tensioner and rollers on schedule, generally every 105,000 miles or ten years, to protect the valves. We also look after the turbo plumbing and the cooling-system plastics that harden with age.
Diesel models (DPF and EGR servicing)
The five-cylinder D5 and the later D3, D4 and twin-turbo diesels are economical and refined, but the emissions hardware needs care, especially on cars used for lots of short trips. We diagnose and clean or replace clogged EGR valves, a well-known issue on the D4 and D5, keep the DPF healthy and carry out forced regeneration where soot levels are high, and look after AdBlue dosing on the newer engines. We also handle injector faults, intake and boost leaks, and the swirl and breather components, so the engine pulls cleanly and passes its MOT emissions test.
Aisin gearbox and electrical systems
Many automatic Volvos use the Aisin TF-80SC six-speed gearbox. Fresh fluid is the single best thing for it: as the valve body bores wear, owners notice a flare in revs or a clunk on the change, so we carry out a proper fluid and filter service to keep shifts crisp, and watch for heat, the number one enemy of this gearbox on heavier SUVs. On the electrical side we run dealer-level diagnostics for everything from sensor and module faults to battery registration, City Safety and driver-assistance systems, coding and software, plus the usual oil-leak diagnosis and repair across the range.