sepulchrave

I'd check the torsion value since you've had the cambelt changed recently, I suspect the timing is out slightly.

Why not just throw another turbo on it and see if it fixes it? I find it hard to believe the head is damaged as well as the turbo, is it possible you weren't able to measure the compression accurately?

A leisure battery is useless, as you've found out it has no cold cranking capacity whatsoever. It is perfectly safe to jump start a car from another vehicle with the engine running, I've been doing it for forty years and never had a problem, in fact it's better if you connect them up and use your mates alternator to boost charge your battery for a good few minutes before actually trying to start it.

Profitably. There, FYP. There is no need to replace the bolts this thread is asking about, they can safely be reused unless they're actually damaged. They're not stretch bolts so it simply isn't necessary.

I'm a practicing engineering professional, I make technical decisions based upon experience without referring to the Internet. I'm not asking you if some of these bolts are reusable, I'm telling you they are.

There are three ways of tightening bolts: Torque only. Torque + angle Torque + angle to yield. Only the last method utilises stretch bolts which cannot be reused. The reason it's done with angle at all is because of industrial power tools, not because of the fastener itself.

They may not be stretch bolts, I am of the opinion that most bolts are reusable unless they're designed specifically to stretch like cylinder head bolts. Many bolts used which are exposed to the elements have a green anti corrosion coating, this coating is lost from the threads upon installation, simply applying a little anti seize compound before reinstalling replaces the coating and therefore renders the bolt reusable.

Most indies avoid such jobs due to the pyrotechnic pretensioner mechanism.

Generally a power amp has a permanent live and a separate switched input to tell it when to wake up, the DAB aerial uses very little current and can be run from any switched live, the blue and white wire should change state depending if the head unit is switched on or off.

All that white smoke is unburnt fuel mist, hence the wet glow plug. Unfortunately I've seen it before, the valve heads will be slightly canted and not sealing properly, you could fit a complete secondhand cylinder head which is less work than a replacement engine and about half the cost in parts and labour.

That car has slipped it's timing and the pistons have tickled the valve heads, it's a head off job I'm afraid. I'm not saying the vendor knew before selling it to you, but I think it's extremely likely.

Always start with the highest range on a multimeter if you don't know what to expect, then you can turn it down until you get a solid reading.

It's not electrical, that compression is far too low, particularly on number four which suggests valve damage.

For crying out loud, the OP stated the car was a 2010 1.6TDI right near the top so it cannot POSSIBLY be a Mark 1. Let's solve the problem instead of getting hung up on misunderstandings and nomenclature! Don't keep going to different garages, go to an independent VW specialist near you, don't forget a Skoda Fabia is really a VW Polo in disguise, so a VW guy will be able to fix it.

Xtrons head units are really cheap Chinese smartphones in drag, replace it with a proper DAB receiver if you actually want to listen to the radio.

You're right of course, silly me, I should have realised they'd be fine on bigger, heavier cars than the Fabia...

Eventually...

I would say that the damage was caused by an internal component coming adrift and falling into the spinning differential.

The difference is that the Polo and the Fabia look totally different because the bodyshell and all body panels are completely different. Ok?

It could be an inner joint, they don't do any steering, Jack up the car, grab hold of the driveshaft and twist it back and forth listening for a click and feeling for any slop.

CV joint?

I'd give the Avons a miss, they're too hard and not very grippy in either wet or dry, I don't like them at all.

My bad, brainfart.

I think you should check the compression on number four.

Nope, wrong PCD.