Vehicle & Technical > Discovery
300tdi belt tensioner
Jake:
James
Check your PM box
:D
muddyjames:
have done
Matt_H:
--- Quote from: "muddyjames" ---Hello. I had the belt tensioner changed last Friday before I went to Wales for the weekend.
The disco had a very small struggle to start on Thursday morning but nothing major. Just thought it was a pre heater gone. .
--- End quote ---
to be honest it's not likely a glow plug or even the whole lot - it's really not cold enough to need them - I don't even bother waiting during the cold weather, I've two batteries though so it helps cold cranking.
--- Quote from: "muddyjames" ---
Drove to Wales. Max speed was 70mph and that was reduced to 60mph up hills. You did say it was sluggish.
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depends what kind of hills really - you should realistically be able to cruise at 70mph on anything the M4 has. I had some in wales where 20 mph was hard enough!
--- Quote from: "muddyjames" ---
Woke up at mates house on Friday, went out side to go out for the day, took ALOT of effort to start up then when it did it wouldn't rev over 1200rpm but did chuck out a massive plume of white smoke out the exhuast for 5 minutes but still no more revs until it had warmed up.
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I noticed it struggling to rev when I came over the other night - very hesitant beyond 1200 rpm, foot flat to the floor it kind of hickups.
Was it white or blue smoke?
Check the oil and water levels cold and hot, if as RedlineMike says it could be the headgasket that's gone somewhere. If engine gasses are getting into the coolant then you may see the water level rise a lot and have gas bubbles in it you won't tend to see white smoke this way round though. If water is getting into the cylinders then the water level will drop slowly over a few days as it is being used up in the engine. When the engine is heating up it is expanding and sealing the gap. Best case you may just be able to re-torque the head bolts (I'm not sure if they use stretch bolts or not tho). Middle case scenario it's head off new gasket and back together, probably about a days work for the home mechanic. Worst case scenario is that the head has warped or cracked in which case it will need milling by a few thou, that would cost probably about £30 to skim but you obviously need to take the engine apart (I've been looking for an excuse to buy some engine stripping tool :-).
If it is blue smoke at tickover then it could be the turbo oil seals (I think the 300 still uses an oil cooled unit). Turbos aren't too expensive to replace despite people often sucking their teeth!
If it's blue smoke at cold then it's could well be the piston rings or valve seals as these expand when they get hot.
--- Quote from: "muddyjames" ---
Belt I had put on the previous day by Keith Gott that had done 200 miles had near enough been stripped and the pully that goes out of the engine was wobbling. So it looks like the key way is bust and the pully for the alternator and the cam belt are both wobbling and loose so I had aht RAC take it away on a low loader today to a garage in Banbury. He is very highly praised for his work by 3 of my mates who take their Landies there and we shall see what happens. Will keep you posted.
--- End quote ---
Now that is interesting. Although I'm not sure what the pully that goes out of the engine is -(????). If the belt has been severely warn then it could be one of the anscilliaries that have gone.. If it is water seeping into the combustion chambers, then it could have run dry or very low, the water pump could have ceised which will have caused the belt problems.
What's the garage in banbury you got it taken too? Have they given you an estimate before starting work etc etc?
Matt
Xtremeteam:
thing is when my HG went it didnt smoke much when cold but when it was warm it was billowing out the back at tickover & when running it would blow the cap of the expansion bottle if you dared unscrew it
the bolts are fixed length & reusable & also doesnt take long to do,as its a 300 takes a bit less but can have the head of in just under/over an hour from starting,takes a bit longer to put back together though (tapets take freckin ages to set)
muddyjames:
I have been told by mates at the weekend who are very land rovery minded that it is probably the key way into the engine hence why the pully was wobbling hence the shreaded belt so the cam belt is probably nearly shreaded as well and if it is wobbling the belt wont be going round the right speed so the timing maybe very slightly out. Thats their thought any way.
I will find out later on today the extend of the damage.
THe garage in Banbury is a one man band guy who used to work on john deer machinery and gave that up quiet a few years back and now specialises in Landies. He charges £25 per hour. No quotes as no idea on exactly what is wrong.
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