Vehicle & Technical > Discovery
300tdi belt tensioner
muddyjames:
I am looking at buying a 300tdi disco with 10 months mot etc etc. m reg 172k miles and the guy has said it has been confirmed by a garage (taking with a pinch of salt as I have learnt not to trust anyone when buying a car) that it needs a new belt tensioner as the bearings are going. He had the cam belt replaced last year. How much of a job is it to do? If it is a garage job how many hours labour am i looking at and how much would the part be and if the part broke what would be the consequences???
Here is the disco I am thinking of. Right price for me and only a few miles down the road. Outside condition is good but havent seen inside yet or heard engine. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4585018851&indexURL=3&photoDisplayType=2#ebayphotohosting
This will determin whether I buy the disco or not.
Cheers
James
Xtremeteam:
thing is the 300 tdi has 2 belt tensioners,
one on the main fan belt on the front of the engine & one that the timing belt runs on,
if the main tensioner fails it knackers the belt & "could" stall the engine so when u fone the aa they tell you the engines seized :evil:
that tentioner is about £60+V & takes approx 20 min to fit,
the timing belt tentioner "shouldve" been replaced when the timing belt was done,to change it would mean preferable a set of tensioner & pulley (£20 each) & about 4 hours labour
Budgie:
Sometimes there is a "squeel" from the main drive belt that sound like either the PAS pump, alt' bearings or the tensioner bearings when it's actually just a pollished belt. A small drop of WD40 on the smooth side of the belt will tell you if it's this. If it is then the noise will stop, returning when the WD40 has gone, just change the belt. ;)
The tentioner has one stud holding it to the front of the engine block and is normally easy to change.
Remove belt from tensioner, remove nut from stud, slide tensioner off stud, put new tensioner in place using location lug, tighten nut and replace belt. Ut's really that easy.
If you get a new one, keep the olod one as a spare because you can get the bearing changed and that's much cheaper than a new tensioner. :D
muddyjames:
thanks for that info. I am now slightly more baffled as there are 2 tensioners!
So when I go to have a look at the disco I need to take some wd40 with me and squirt some on the cam belt. If I cant work out which is the cam belt I could just give a little squirt on all of them?
If the engine does stall and the aa say siezed has it siezed or does it just need a new tensioner or is that the cam belt gone and major problems?
What do you think the chances are of a friendly garage coming and looking at the disco with me? Not much chance I bet.
Oh I dont know what to do now. I will go and have a listen anyway. Thanks alot guys for the help. Really useful. I know more now than i did a few mins agao anyway. Any more help will be welcome. If any one wants to look at it with me in the Basingstoke / Reading area your more than welcome too!!!
Budgie:
James, just to make it a little clearer:
I was talking about the drive belt.
This runs the off the crankshaft pully and powers the fan, PAS pump, water pump and alternator. The other pully is for the injector pump.
Unless the Disco has air-con then this will be the only belt you will see.
The cam belt is inside the front cover on the engine and you won't be able to see this. As Mikee said, if the timing belt has been replaced then this tensioner should have been done at the same time.
The Drive belt tensioner is the more common problem with the 300 TDi, either the bearing goes or the tensioner gets out of alinement and causes the belt to squeel.
Another common problem with this engine is that the rev counter sometimes either jumps all over the place or drops to zero. This is nothing worry about as it's normally just a loose connection on the back of the alternator. But don't tell the sell as it may be a good bargining point!! :wink:
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