Nissan SR20 (SR family, 1.8 and 2.0)
2.0 L · inline-4 · naturally aspirated · petrol · 1989–present
Also known as: sr20de, sr20det, sr20ve, sr20, sr engine, 200sx engine, silvia engine, sr18de, sr18
Nissan's 2.0 four — in the Primera and Sentra, and, as the turbocharged SR20DET, in the Silvia and 200SX.
⚑ It is one of the most heavily modified engines in this catalogue, and that changes the diagnosis before it starts. An SR20DET swapped into a car that left the factory with something else is common; so is a rebuilt engine whose stamped code no longer describes what is inside it. Confirm what is actually fitted before trusting any specification — compression ratio, fuel requirement and boost target all move.
On a standard engine the recurring items are ordinary. The crank angle sensor sits in the distributor and fails with heat, giving an intermittent stall and no-start that clears when cool; valve cover and oil pan gaskets leak with age; and the timing chain guides rattle on a cold start at high mileage.
Its known weakness is the oiling system under sustained high load, which is why bearing failures are discussed so much — but that is a track-use conversation, not a road-car one. On a standard car the oil interval is what matters, and on a modified one the oil system is a design question rather than a maintenance one.
The SR20VE is a variable-lift engine and behaves differently above its switch point; treating it as a plain SR20DE misreads what a loss of top-end power means.
Cars fitted with this engine
5 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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