CriticalCommonEngine

Nissan Silvia: SR20DET rod bearing wear — tight clearances that do not forgive neglected oil or added boost

SR20DET rod bearing wear — tight clearances that do not forgive neglected oil or added boost is a common engine fault on the Nissan Silvia on the 1991–2002 cars, and we rate it critical. Putting it right costs $3,000 to $12,000 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 10 documented faults on the Nissan Silvia.

Vehicle: Nissan Silvia
Engine: SR20-DET
Years: 1991–2002
Fuel: petrol
System: Engine

This page covers the Nissan Silvia as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Nissan Silvia faults10 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

The SR20DET runs deliberately tight bearing clearances, which is part of why it feels so tight when healthy and why it is unforgiving when it is not. Hot oil, raised boost and stretched oil-change intervals all thin the oil film at the big-end bearings, and once that film breaks down the bearings wear and the engine develops a knock. The standard rods are generally regarded as beyond their limit somewhere around 300 wheel horsepower sustained, so a car running more boost than standard without an oil cooler and a fastidious owner is a car on borrowed time. This is the failure that ends these engines, and unlike most of the list it is not repairable cheaply.

What you would notice

A deep knocking or rumbling from low in the engine, worst under load and on a warm engine
Oil pressure light flickering at idle when hot
Boost raised above standard with no oil cooler fitted
Metallic glitter in the oil or on the drain plug
Knock that appears when you lift off after accelerating

How to check it

Where to look. Big-end bearings in the bottom of the engine

Get the car thoroughly warm and then listen from outside with the bonnet up while somebody blips the throttle — big-end knock is a deep rumble low down, not a tick from the top. Listen especially as the revs fall back after a blip, which is when it is loudest. On the road, accelerate firmly in a high gear and listen through the pull rather than at idle. Look at the dipstick and the oil filler for any metallic sparkle. Then look at what has been done to the car: ask directly what boost it runs, whether it is standard, and whether an oil cooler has been fitted. A modified car with no oil cooler and no receipts should be priced as though the engine is due. If a workshop inspection is possible: a compression and leak-down test, and an oil-pressure gauge on it hot, will tell you far more than any listening.

What it costs to put right

$3,000 to $12,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Is the boost standard, and if not, what does it run and who set it up?”
“Is an oil cooler fitted?”
“Has the engine ever been rebuilt, and do you have the receipts?”
“Has it ever been tracked or drifted?”

Now check the Nissan Silvia you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

JDMBuySell — SR20DET engine specifications, tuning and chassis guide
NICOclub Nissan Forums — 'SR20DET rod bearings'
Driftworks forum — 'Silvia S14a SR20DET rod knock?'

Nissan Silvia buyer questions

Is sr20det rod bearing wear — tight clearances that do not forgive neglected oil or added boost serious on a Nissan Silvia?

We rate it critical and common on the Nissan Silvia. The SR20DET runs deliberately tight bearing clearances, which is part of why it feels so tight when healthy and why it is unforgiving when it is not. Hot oil, raised boost and stretched oil-change intervals all thin the oil film at the big-end bearings, and once that film breaks down the bearings wear and the engine develops a knock. The standard rods are generally regarded as beyond their limit somewhere around 300 wheel horsepower sustained, so a car running more boost than standard without an oil cooler and a fastidious owner is a car on borrowed time. This is the failure that ends these engines, and unlike most of the list it is not repairable cheaply.

How much does it cost to fix on a Nissan Silvia?

$3,000 to $12,000 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Nissan Silvia years are affected?

Our research records this fault on the 1991–2002 Nissan Silvia. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.