Thanks for the replies lads I am just waiting for another call from my mechanic. I'll let you know the outcome in a while.

Well Rev James it looks like your right, this is not a handbrake problem. My mechanic has removed the front propshaft and the vibration has gone. However, he can't get the car to move without selecting diff lock. First of all can anyone now tell me more definately what may be wrong with it...

Four months ago I changed my tyres. I had BFG Macadams on and I got the best part of 25000 out of them. I'm sure it would have been more had I not towed a 2.5 ton trailer round on a regular basis. I replaced them with BFG A/T and they have been on for 4 months now and aren't showing signs of...

Its taken me a while to get back to you and my thread has been hijacked it would seem. Anyhow, I don't have a problem on my prop shafts apparently. It is vibrating violently now and it has been put to me that Discoverys have been known to throw a handbrake shoe and that this could be the problem...

Thanks for the replies Wreckhunter & Odenne. I am on the case and will let you know what I find tomorrow.

First of all Stig, no it's not in diff lock. Funny enough that was the first thing I checked. Hughesy I will get under it 1st thing in the morning and check for movement. I will come back to you.

Revjames I will have to watch what I say with you won't I you wit!! Anyhow thanks for replying and well I would say the noise speeds up with the revs, but is that loud to start with its difficult to say it gets any louder. And as I say the noise isn't there all the time, but the vibration is...

I have an M reg 300Tdi Discovery with 162k on the clock. Quite out of the blue it has started to vibrate heavily when I acclerate. Also sometimes it makes a really loud clanking noise at the same time just like dragging tin cans along the road as I accelerate and move up the gears. I can't hear...

David451 CRACKED IT! :D I just knew that if I carried out certain things from your replies I was bound to hit the right one eventually. It was down to adjusting the Injection pump. When I loosened the 3 nuts on the rear side of the timing case and the 2 that are on the clamp at the back...

David451 Well I managed to talk a local farmer into letting me use one of his byres to look at my motor. I started by looking at the injectors. I had both my Tdi's with me so that I could swap the good ones into the bad car. Unfortunately though I soon came to a halt because I couldn't get...

David451 Yes you are right I did have to re-fuel en-route and infact filled it with nigh on £90 worth of diesel, so almost an entire tank. The problems with smoke were with me well before that though and are still with me now so I think that can be ruled out. The fuel filter was changed just 3...

David451 Thanks again for your detailed notes. Since my last post I have unfortunately spotted smoke again when the engine was hot. I thought I had sorted that bit. I am of course going to investigate all your suggestions, but will not be able to get down to it now until after Monday...

The Biglad Thanks for your input. I will go through your list, however, the fuel filter has already been replaced in the last couple of days and we attempted to drain the sedimenter. That as yet has not been done as we can't move the tap on the bottom and are wary of breaking it. If you have...

Further to my problems with smoke. I have had a garage mechanic, one that I can trust, look at my car. He feels that the engine is tight and in good nick and feels that my problems are definitely fuel linked. Initially he suggested that I put a heavy dose of Redex diesel and injector cleaner...

Its a good while since I was at this yard , but there is a breakers in chaddesden, Derby. It is Looms's and its just off the ASDA island. If you were to leave JNC 25 of the M1 and take the A52 towards Derby, you will come to this Island about 2 miles before you get to the City. Unfortunately I'm...

Kellymike I have just taken the car out and got it up to temperature. With the engine just ticking over I then opened the oil filler cap and found no sign whatsoever of any smoke. I'm hoping this is a good sign! I do have another 300 Tdi which is the same age, but has done 70,000 more miles...

I will checkout what you suggest and get back to you. Thanks for the reply.

I currently have a knock also coming from behind the drivers seat. In my case it is the lower link bushes that have given up the ghost. They are sited somewhere close to the backend of the drivers seat and are attached to the chassis. They are like big rubber bungs each secured to the chassis...

Ok David. I just started the car and it was instantly ropey on tickover. However, as long as I don't touch the throttle it soon settles down to a nice tickover. Infact it settles down faster than I could get round to undoing the injectors. Anyway I slackened them off one by one and sure...

Thanks for a great detailed reply David. I will go and have a look now seeing as we have more daylight this evening. Will let you know my findings.