Learning more about cars - Bobbin Threadbare

I have noticed how technologically awesome some of you are on this forum, which leads me to believe that there are vehicle mechanics and hobbyists among you.

I enjoy reading about cars and have a good memory for what the vehicles I see on the roads have inside them, and I can perform very basic maintenance on my own car (y'know; bulbs, oil, water, changing a wheel, tyre care, jump start).

However, I couldn't open a car up and fix something - admittedly most cars have everything sealed in nowadays so you can't fiddle with it, and there's so much electronic wizardry in there as well. I also steer away even from T-Cut as I am afraid of making things worse.

I wondered which car would be a good bet for a beginner to restore - nothing too taxing obviously! I am a scientist, so I do have some idea of how things might work.

Has anyone restored something cool themselves?

Learning more about cars - TeeCee

>I wondered which car would be a good bet for a beginner to restore

Usual advice here is MGB. Plenty around in various states of "need". All parts available cheap as chips. Plenty of specialists to do the bits you can't yourself and loads of advice available when you get stuck, including two of the largest one-make clubs. Aftermarket trim and addon / improvement options are endless, providing scope for tinkering limited only by your wallet.

The bodywork's like one of those kid's jigsaw puzzles with big, easy pieces (or those with pots of cash can just buy a whole new body, they're available too) and the mechanical / electrical bits are about as simple as it gets in a post-war vehicle. No "nasties", everything's pretty easy to get at.

Insurance through the specialist brokers is ludicrously cheap by comparison to what you pay on a modern vehicle. This more than makes up for the fuel consumption. Early ones have no tax.

Rust is a major issue, but name something worth restoring that this caveat does not apply to!

GT is cheaper / more practical, Roadster more fun.

Learning more about cars - Bobbin Threadbare

Thanks TeeCee. Funnily enough, MGBs are exactly what I have been looking at. I really like the unusual shape and there's a lot of interest in them. I've been following a 1971 example for a few days and there'd be no tax, and like you say, very cheap insurance. Fun to drive too, by all accounts.

Learning more about cars - TeeCee

Check for:

1) Rot in the sills. Very common, all parts available to fix but can cost a bit to have done. Temptation here is to smack on an outer sill only, leaving the middle diaphragm rotten. Check for evidence of this.

2) Overheating. Less common on earlier cars, but still occurs. Usual causes are iffy radiator or, the ultimate sin, someone having put on one of those "bellows" type thermostat bypass hoses which are prone to leaking under pressure. Only solution to the latter is to bite the bullet, pull the head and fit a proper one. Common wisdom says that fitting aftermarket thermostatic fans and such improves matters, this is papering over the cracks. A properly sorted standard cooling system will produce no problems. Let it sit at idle for a good long period. The temperature gauge should settle down well before it gets to the "hot end".

3) Fuel pump. If it comes with the standard SU pump with actuator points, replace it with an electronic one ASAP. There's no fun in beating the crud out of one at the side of the road in the peeing rain in an attempt to get home.

4) Drop in a Luminition "Magnetronic" ignition kit to replace the points and condensor. Infinitely more reliable, better starting, smoother idling, better acceleration and eliminates timing drift. Simple DIY job.

5) On roadsters the door skin splits where the quaterlight joins. Skins and doors available but, again, a pain. Always close the door using the handle and not by pulling the quaterlight, however tempting that may be!

6) Warmth in winter is perfectly possible. Just swap the thermostat for the one specified in the book for "cold climates" at the end of autumn and put back the original come spring. Only takes a few minutes, but use a proper cork gasket rather than one of those "cut to shape, one size fits all" things and a load of jointing compound. Makes it easier come next time.

7) Take the time to learn how to set and balance the SU carbs yourself. You'll do a far better job than anyone else, as you'll take the time to get it right. 90% of "my MGB isn't running well" issues I have dealt with are due to someone having a made a pig's ear here.

8) Check the oil pressure gauge reading when warm and running. If it drops much below 25 psi at idle, the bottom end of the engine is not long for this world. That's usually accompanied by the telltale knocking of big ends on cold start. Make sure you get to listen to it being started from cold, if the vendor invents excuses for it always being warm when you see it, walk away. Gauge needle should remain steady at given revolutions and rise and fall smoothly with revs. Any "flicking" here indicates something wrong with the oil pump or a sticking oil pressure relief valve.

9) If you are used to modern engines, a variety of clattering noises from the top end is not a problem, it's just the way things were. OHV pushrod engines with valve clearances nearly always have at least one worn tappet that clacks away continously. They'll do thousands of miles quite happily like that.

10) If it's had hard valve seats fitted to the head for unleaded fuel, so much the better. The alternative is to buy bottles of additive and tip a dose in at each fill.

11) Early cars are fitted with two 6-volt batteries. These are the only really pricey objects on the car. Ensure the ones with the car are Ok (i.e. it turns over briskly when cold). Look at them, they should look about the same age and "scruffiness". If one looks suspiciously newer than the other, expect to be buying another really soon.

Yes, they are great fun to drive. I ran one as my daily driver for eight years and only gave up when I moved abroad. The secret is not to expect it behave like a modern car and just have a service once a year. Listen to it, feel it and when something "seems wrong" work out what it is and fix it before it fails.

Learning more about cars - unthrottled

Take the time to learn how to set and balance the SU carbs yourself. You'll do a far better job than anyone else

So true! How many people think they are 'good with carbs' and 'tune by ear'. The classic error was for an amateur to think the mixture had 'gone wrong' and to start messing with the main mixture screw in order to give the best tip-in throttle response. Of course the main jet isn't responsible for transient response, but never mind! This meant that the engine was running permanently rich under steady state.I reckon half the engines that burned oil had suffered a 'tune up' and ran rich enough to wash the oil off the bores. My last car with a carburettor had a sealed carb and the mixture strength was non adjustable-evidently OEMS wanted to stop people messing it up!

The plastic cover over the engine is a sad sign, but maybe it is for the best...

Edited by unthrottled on 27/05/2011 at 15:23

Learning more about cars - unthrottled

As earlier posters have noted, corrosion is a huge problem in old cars. Corrosion in the undercarriage and steering/braking system is not fun or easy for a DIY mechanic to fix. And you're much more likely to be under the car than under the bennet sadly!

Learning more about cars - jamie745

Has anyone ever seen Wheeler Dealers on Discovery Shed? Some of the stuff that Genius of a mechanic, Ed, can do is just magnificent.

Learning more about cars - Sofa Spud

Land Rovers are good for 'projects' mainly because everything is bolted or screwed together, most bits are easy to get at, spares are easily available and relatively cheap and theres a big enthusiasts' following for them.

Most of the body panels on a Land Rover are aluminium, which doesn't rust, but it does the aluminium equivalent - it turns to white powder! The chassis, bulkhead and various other bits are steel and they do rust, quite badly!

Other bolt-together classics are the Triumph Herald / Vitesse and their close cousins the Triumph Spitfire and GT6.

Edited by Sofa Spud on 27/05/2011 at 16:51

Learning more about cars - daveyjp

If you are going for a classic go for one which has already had substantial work and then keep it fettled - a well looked after classic will retain value.

A friend has had an MG since 1982. In the 30 years it has been completely rebuilt, but it is a better car for it. No signs of rust since it had major work almost 20 years ago, but despite all this work he wouldn't get megabucks for it.

Learning more about cars - Bobbin Threadbare

I think these are probably more of a labour of love than a money-spinner!

I can't (and don't wish) to do anything too complicated as I don't want to have an expensive mess sitting in my garage. I'd really like to tidy up a Triumph Stag for my mum's 50th as they are her favourites.

Land Rover is an interesting idea - I hadn't thought of those.

Thanks everyone for suggestions etc.

Learning more about cars - unthrottled

Mechanical complexity isn't really a huge problem. It just means you have to think a bit harder. It's rusted out components that are the major problem. A seized bolt with a rusty head is a bigger headache for most people than a fuel injection system. The stag shouldn't be a problem in this respect since the V8 was so unreliable that most of them rarely ventured outside!