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27th April 2010, 07:58 AM
#1
300TDi timing belt
hi i have just bought a 12/94 disco and the existing timing belt has done 90,000 km.
i am fairly competant on the tools and i have a rave manual for 1995 and on in the disco's
my question is is there much drama in changing the timing belt? apart from the obvious pulling a lot of stuff of the front of the motor
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27th April 2010, 08:10 AM
#2
No drama, quite straightforward. Takes about an hour, to an hour and a half.
Not too much to remove. Fan shroud and fan, ac and alt belts and tensioner, crank pulley and timing cover.
Follow the instructions, and it's a piece of cake.
(probably the hardest part is getting the new belt on, but once you loosen the 3 pump bolts, it's not bad. - just make sure you have the pump and flywheel pins in place.)
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28th April 2010, 06:06 PM
#3
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28th April 2010, 09:16 PM
#4
I'd like to concur with the responses above, - no rocket science involved - I'd only add that my first change took me around 6hrs (thats just me - a little slow and cautious). I did my 5th belt change on the weekend for a mate and it still took over 3hrs with both of us working on it. The last two I havent bothered removing the radiator or using the locating pin thru the bellhousing into the flywheel - just set it by eye (still used the pump pin thou). Make sure you have a good puller on hand to remove the harmonic balancer and make sure you do the crank bolt up very tightly during reassembly and use a strong thread locking fluid. I also noticed that the kits are now saying you dont need to rotate the crank after assembly and then re-tension the belt, but I'd recommend still re-tensioning. I had to check one of my changes and noticed that the belt had lost almost all its tension after running for only a few minutes, so I'm glad I checked it. So I would recommend rotating the belt a few revolutions and re-tightening.
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29th April 2010, 08:32 AM
#5
Hi Taz,
Just out of interest how are you determining TDC without locking the flywheel? I can't use the flywheel method as the drive plate was replaced & the notch does not line up for some reason now, I recall the mechanic saying the holes didn't line up on the new drive plate so he had to elongate them a bit, I was 1200k from home so had no option to accept this dodgy work at the time.
When I replace the belt now I just line up the woodruff key on the crank so its at 12 o'clock & hope for the best!
Cheers
Mark
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29th April 2010, 10:11 PM
#6
Hi Mark,
I just lined up the flywheel slot by eye thru the bellhousing hole. I also experiemented a bit by advancing and retarding the timing buy fitting the pump pin when the flywheel slot was off-center. I could advance it by around twice the slot thickness before the onset of diesel knock was evident. This together with the general un-precise nature of the pump pin fitment led be to believe you dont need to be anal about the acuracy - so by getting it close using your method, you could tweak it by ear and get it just as accurate as someone using the flywheel pin.
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