Mobile Classic Car Service — we come to you

Classic Car Servicing: Because Your Triumph Deserves Better Than a Bloke Who Just Unplugs His Laptop and Shrugs

Take your classic car to a modern garage and watch what happens. The mechanic plugs in his OBD reader, stares at it for thirty seconds, sees nothing, and then slowly suggests that perhaps you should think about a newer car. What he won't do is understand that your SU carburettors need balancing, that your points gap needs checking with a feeler gauge, or that the ignition timing wants a degree of fine-tuning rather than a firmware update. Classic cars — anything from a proper British icon of the 1960s through to the analogue, pre-CAN-bus machines of the early 1990s — need a mechanic who actually knows how they work. Not guesses. Not YouTube confidence. Actual mechanical knowledge of distributors, condensers, dynamos, choke mechanisms, and the particular personality quirks that your specific classic has developed over fifty-odd years of British weather. SOS CarFix brings that knowledge to your driveway, your garage, or your storage unit. No trailer needed. No drama. Just a proper service done properly.

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The short version

Mobile classic car servicing at your driveway or storage — points, carbs, ignition timing, sympathetic maintenance by people who actually know what a dynamo is. Get a quote.

How it actually works

The fundamental difference between a classic engine and a modern one is that the classic is entirely mechanical — it cannot lie to you via a sensor reading, and it cannot hide its problems behind a fault code. That is either charming or terrifying, depending on whether you know what you're looking at. Older petrol engines (broadly, pre-1990s carburetted units) use a distributor to divide the ignition spark between cylinders in sequence. Inside the distributor sits a set of contact breaker points — a mechanical switch that opens and closes to trigger the coil. Points wear down over time and their gap drifts, retarding the timing and flattening performance. A condenser sits alongside and prevents the points arcing to destruction. Get the points gap wrong (typically 0.35–0.40mm on many British classics, but always checked against the specific car) and you'll have a misfire, poor fuel economy, or a car that simply won't start on a cold morning in January, which is exactly when you most want it to. Ignition timing is then set dynamically — strobe light against a timing mark on the pulley, advance curve checked against the vacuum advance — and the carburettors tuned for mixture and balance. On twin-SU setups this means synchronising airflow with a Unisyn or similar gauge. It is satisfying, methodical work. The modern alternative is an electronic ignition conversion — reliable, maintenance-free, and invisible under the distributor cap, so the car still looks original.

“SOS CarFix brings that knowledge to your driveway, your garage, or your storage unit.”

The warning signs

Sound familiar?

Your classic starts fine when warm but needs ten minutes of choke coaxing from cold — and the choke mechanism itself has the consistency of a mood ring.

There's a flat spot when you open the throttle — that brief hesitation before it reluctantly decides to accelerate, like it's reconsidering its life choices.

The engine runs lumpy at idle, occasionally fires on fewer cylinders than God intended, or sets off on a hunt that no amount of tickling the carb will cure.

You can smell petrol in the engine bay, particularly near the carburettor — either the float needle is leaking or an ancient rubber fuel line has developed honest opinions about its age.

The dynamo warning light flickers or stays stubbornly on, suggesting the charging system has quietly retired without telling anyone.

Oil consumption is climbing — a pint per 500 miles is charming; a pint per 200 miles means the rings or valve stem seals are contributing to the UK's carbon footprint in a particularly localised way.

The brakes need a longer pedal travel than they used to, or one rear drum pulls noticeably — classic drum brake adjusters have a habit of seizing solid and then being forgotten about entirely.

Common causes

So what's behind it?

1Points and condenser wear — contact breaker points have a natural service life, typically 12,000–15,000 miles or annually, and when they're done they cause misfires, hard starting and poor economy.

2Carburettor jets and needles wearing or clogging — decades of fuel varnish, debris from an old steel tank, or simply a jet that has never been properly cleaned since the Carter administration.

3Ignition timing drift — the advance mechanism inside a distributor uses mechanical weights and a vacuum capsule, both of which wear, stick or crack with age, shifting your timing away from where it should be.

4Perished rubber: fuel lines, coolant hoses and carburettor diaphragms deteriorate with age and heat cycling regardless of mileage — a classic that has sat unused for five years may have worse rubber than one that has been driven regularly.

5Old-style positive-earth or early negative-earth electrical systems with dynamos rather than alternators have a charging output that drops at low revs, meaning lots of town driving gradually drains the battery.

6Brake adjustment neglect — drum brake shoes on classic rear axles require periodic manual adjustment as the linings wear; unlike modern self-adjusting systems, if nobody does it they just get further and further from the drum.

7Incorrect modern parts substitution — well-meaning previous owners fitting modern synthetic oils, modern spark plugs with the wrong heat range, or ethanol-blend fuel through rubber that was never designed for it.

What we do — at your door

We come to you — driveway, storage unit, lock-up, or farmyard corner where the car has been sleeping under a tarpaulin since 2019. We carry the tools that classic work actually needs: feeler gauges, a strobe timing light, Unisyn and Carbalancer for twin-carb synchronisation, compression tester, coil and condenser test equipment, and a genuine understanding of what the service schedule in a 1973 workshop manual actually means in practice. A classic service typically covers: engine oil and filter change (using the correct viscosity for older, wider-tolerance engines — not whatever the supermarket had on offer), points and condenser replacement or electronic ignition fitment, plug replacement with the correct heat range, ignition timing set dynamically, carburettor cleaning and mixture adjustment, all fluid levels, cooling system inspection (classic thermostats and hoses have strong opinions about failure), brake inspection and drum adjustment, and a general look over the car for anything that needs attention before it becomes expensive. We source parts sympathetically — quality aftermarket where it's appropriate, NOS or specialist suppliers where it matters, and we'll tell you honestly when something needs a specialist restorer rather than a roadside spanner.

What affects the price

Classic car servicing cost in the UK varies more than modern car work because the labour is more methodical (setting ignition timing properly takes time; rushing it costs you performance) and parts sourcing can range from a £3 condenser off the shelf to a months-long search for an NOS distributor cap. As a general shape: a full classic service with points, plugs, oil and filters, timing and carburettor tune sits in a different bracket to an oil-and-filter-only interim service. Electronic ignition conversion kits (Pertronix, Aldon Ignitor and similar) add to parts cost but pay back in reliability and reduced maintenance intervals — worth discussing on a case-by-case basis. Carburettor rebuilds vary enormously depending on whether your SU just needs a needle and jet clean or a full diaphragm and spindle overhaul. Brake work on classics — particularly drum brakes that haven't been touched in years — can be straightforward or can involve seized adjusters, hardened shoes and corroded wheel cylinders, so the range is wide. We quote before we start, itemise what's needed and what can wait, and we won't use your car's charm against you to upsell unnecessary work.

Random knowledge you didn't ask for

The SU carburettor — fitted to almost every British classic from MGs to Minis to Jaguars — was invented in 1905 by George Herbert Skinner and his brother Carl. The SU stands for Skinner's Union. It works on a dashpot and needle principle that is mechanically elegant, almost impossible to destroy if maintained, and baffling to anyone who has only ever seen fuel injection.

Classic cars registered before 1 January 1977 are exempt from MOT testing in the UK — but that exemption is a privilege, not an invitation to run unchecked. DVSA can still pull a clearly dangerous vehicle off the road, and your insurer expects the car to be roadworthy. Regular servicing is how you stay on the right side of both.

Lucas electrics — fitted to virtually every British car from the 1950s through the 1980s — earned the nickname 'Prince of Darkness' primarily because the earth return system on positive-earth cars was poorly understood by later owners who converted them to negative earth without updating the wiring. A correctly maintained Lucas system is actually reasonably reliable. The problems mostly start when people tinker without understanding what they're doing.

Questions you're probably asking

My classic hasn't been used for two or three years — where do I even start?

Start with us. A recommissioning inspection covers the things that deteriorate on a standing car regardless of mileage: fuel system (old petrol goes stale and varnishes jets within months), brake hydraulics (master and wheel cylinders corrode internally), coolant hoses and rubber fuel lines, battery and charging system, tyre condition including sidewall cracking, and brakes that may have seized or corroded shoes. It's almost always cheaper to catch this methodically than to find it one failed component at a time on the road.

Can you service my classic at my storage unit or lock-up?

Yes, that's actually one of the most common requests for classic work. We come to wherever the car lives. The only requirements are basic access around the car and, if we're going to need the engine running, reasonable ventilation — not a sealed underground vault. Bring a tea flask and we'll do the rest.

Do I need to use classic-specific oil or will any oil do?

This matters more than people think. Most older engines pre-dating the 1990s have larger clearances and plain bearing designs that were engineered around straight mineral or semi-synthetic oils with high zinc (ZDDP) anti-wear additive content. Modern low-viscosity fully synthetic oils can be too thin and are often formulated for modern catalytic converters — lower in ZDDP because it damages cats. For a 1960s or 70s engine, a 20W-50 mineral or classic-formulated oil (Millers, Castrol Classic and similar) is the correct choice. We'll specify the right grade for your car.

Is electronic ignition worth fitting, or should I keep it original?

Depends what you want from the car. Pertronix Ignitor, Aldon Ignitor and similar kits fit inside the original distributor cap so the car looks entirely stock — no visible modification. You get reliable, maintenance-free ignition without setting points every service. If you're showing the car at concours level where judges open the distributor cap, keep it original. If you drive the car and want it to start first time on a wet Tuesday morning, convert it. Both positions are legitimate.

My classic has drums all round — are they safe compared to modern disc brakes?

Drum brakes get unfair bad press. A properly adjusted, correctly maintained drum brake system — especially on a car that weighed 800kg and had a top speed of 85mph — is more than adequate for the job it was designed to do. The problems arise from neglect: unadjusted shoes sitting 4mm from the drum, seized wheel cylinders that have never been replaced, or hardened friction material that glazes over. Keep them maintained and they do their job. Just don't try to brake from motorway speeds in the style of a modern performance car — that's not what they were designed for.

Classic Car Servicing — sorted at your door

Stop procrastinating. Get a transparent quote and we'll come to you.

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