New owners
You've Just Bought a Stag
Your first month with the car, in the order to do things.
Congratulations. You have bought one of the best-looking British cars of its decade, with a V8 that sounds like nothing else, and you are probably slightly nervous about what you have taken on. That is normal. This page is the first month in order: what to check before you drive it, who to join, and the one system to understand before anything else.
Step 01
Before you drive it anywhere
However keen you are, resist the urge to drive it home and straight out again the next morning. An hour in the garage first will tell you whether the car is safe to use at all. Check the coolant: its level, its colour, and whether there is any sign of oil in it. Check the oil itself. Look underneath for fresh leaks after the car has stood overnight. Look at the tyres for age rather than tread, since a low-mileage classic can wear tyres that are old enough to be dangerous while looking nearly new. Then work the brakes gently somewhere quiet before you need them in anger.
The detail lives elsewhere in the archive: coolant and corrosion protection, engine oil and filter, wheels and tyres, including how to read a tyre's date code, and the braking system.
Step 02
Find out what you have
Before you order a single part, establish exactly which car you own. The commission plate tells you the commission number, and from that the year, the mark and whether the specification matches what the car wears today. The paint and trim codes on the same plate matter when you come to match colour or interior. Half an hour with the Identification page will save you from ordering Mk1 parts for a Mk2, or vice versa.
The Stag Owners Club can obtain factory build records for individual cars, which tell you how yours left Canley: original colour, trim, gearbox and despatch date. That is worth having early, and the club is the place to ask.
Step 03
Join the club
This is said plainly because it is meant: join the Stag Owners Club. It runs the busiest members' forum for the model, publishes eleven magazines a year, holds the factory build records mentioned above and has area meetings across the country. For a new owner it is the single best thing you can do. This archive is a reference, not a substitute for thousands of members who have already solved whatever you are looking at.
The Community page lists the club alongside the other forums and owner groups worth knowing about.
Step 04
Understand the cooling system before you go far
If you read only one technical subject on this site, make it this one. The Stag's reputation was made by overheating, and almost every Stag problem that matters traces back to the cooling system: its coolant, its radiator, its header tank and the corrosion that follows when any of them is neglected. None of this should frighten you. The failure modes are understood, the fixes are known, and a sorted system stays sorted. You do need to know how yours is configured and what good looks like before you cover any real distance.
Start with Overheating & Cooling, then Cylinder Heads & Head Gaskets for what happens when cooling is ignored, and Timing Chains for the other service item that must never be left to chance.
Step 05
What to expect in the first weeks
A few things will catch you out if nobody warns you. The temperature gauge is not always a truthful witness: the original sender reads only one cylinder head, so a calm needle does not guarantee a calm engine, and many owners fit a second sender or check with an infrared thermometer. Hot starting can be awkward after a short stop on a warm day, which is a known trait rather than a fault developing. Some noises are normal for the car and some are not, and learning which is which takes a few weeks of listening.
When something does seem wrong, work through Fault Finding by symptom, and Diagnostics for the method behind it.
Step 06
Paperwork
Two pieces of admin are worth doing early. First, establish where your car stands on MOT and tax exemption, since the historic vehicle rules have conditions that catch people out, particularly around substantial modifications. Second, arrange classic insurance with an agreed value, so that the car is insured for what it is actually worth rather than what a standard policy decides after the event. This archive does not recommend insurers, and you should take your own advice on both.
The background is on MOT & Tax Exemption and Insurance.
Step 07
Start a history file
From the day the car arrives, keep every receipt, photograph the work as it happens, and write down what was done, when, and at what mileage. This is not fussiness. A documented history is what separates a car with a story from a car with proof, and it is worth real money when the car is eventually sold. It is also how you diagnose the car: a note that the coolant was changed two years ago, or that the chains were done at a particular mileage, answers questions you have not thought to ask yet.
Step 08
Where to get parts and help
The Stag is well served for parts, from service consumables to recommissioned Stag-specific components, and the club runs its own spares scheme for members. The Parts & Spares page lists the suppliers, and Resources covers the manuals, books and specialists worth knowing about.
Step 09
What not to panic about
You will, at some point in the first month, lie awake wondering what you have done. Here is the honest position. A sorted Stag is a dependable car. The faults are few, famous and thoroughly understood, and every one of them has been solved by somebody before you, usually many times over, with the answer written down where you can find it. The cars that give trouble are the neglected ones, and neglect is a choice you have already decided not to make by reading this page.
The full argument, including how the car earned its reputation and how the community fixed it, is on Is the Stag Really That Bad?.
Step 10
Your first proper drive
Once the checks are done, the club joined and the cooling system understood, take the car out properly. Roof down, no destination that matters, long enough to get everything fully warm and to start learning the car's noises and manners. Before you go, read Before a Long Run, which covers the few minutes of preparation that make the difference between a fine day out and a story you would rather not tell.
Welcome to Stag ownership. It is a better car than its reputation, and you are going to enjoy it.
Common questions
Asked by everyone at this stage
- Are Triumph Stags reliable?
- A properly sorted and maintained Stag is reliable. The poor reputation dates from the 1970s, when build quality, the wrong coolant and misunderstood service intervals combined against it. Each of those failures has a known fix today. The full answer is on the Reputation page.
- What should I look for when buying a Triumph Stag?
- A stone-cold start, an even radiator temperature, no bubbles in the expansion tank, no mayonnaise under the oil filler cap, quiet timing chains and honest rust in the known places. The Buying Guide walks through every check in the order to do them.
- What are the common Triumph Stag problems?
- Overheating from neglected cooling systems, warped alloy cylinder heads after overheating, worn timing chains, and rust in the usual structural places. All are well understood, and the fault-finding and how-to sections of this archive cover each one.
- How many Triumph Stags are left?
- Triumph built 25,939 Stags between 1970 and 1977, and the survival rate is exceptional for a British car of the era, with well over 40% of UK-registered cars still accounted for. The Production and Survival Data page has the figures.
The site-wide FAQ answers these and many more in a searchable form.