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ridgeback_moor
Member Since: 11 Mar 2008
Location: Gateway to the Moors
Posts: 1603
  
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| Front belt tensioner bearing replacement - with pictures |
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After a few weeks of loud squealing (initially at 2000-2300rpm, but eventually at all revs), the bearing of the front serpentine belt tensioner finally failed recently. I wasn't able to get hold of a complete tensioner on the day I needed it, so I opted to change just the bearing. The following pictures may help anyone looking to do the same.
Here you can see the failed tensioner, sitting off centre due to the lack of ball bearings! I drove about 30 miles with it like this 
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Removing the belt shows the problem a bit clearer. A 3/8 square socket drive (as shown) is used to rotate the tensioner, allowing the belt to be slipped off.
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Once the tensioner is off (by removing the long bolt on the lower part) the problem is quite obvious!
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Removing the remains of the bearing from the tensioner pulley. A hammer and screwdriver will get it out, although it will take a bit of time as it needs to come out bit by bit, rotating it after each tap.
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That did the trick 
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The remains of the inner bearing are easily unbolted from the tensioner arm:
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Tensioner pulley, remains of old bearing, and brand new bearing. The bearing is a standard size - 40mm OD, 17mm ID, 12mm Thick, sealed on both sides. This one's from Brammer (BSL), SKF part number 6203-2RSH. 6203 relates to the sizes, 2RSH is the seal spec. I'm not sure what the H stands for, but a 6203-2RS is also fine. They are cheap on eBay - just google the part number. I needed mine asap hence Brammer, where it cost about 7 quid.
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New bearing ready for pressing in:
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Using a suitable socket (my 32mm socket had a 39.5mm OD which was perfect - make sure the pressure is on the outer part of the new bearing, not the inner) the bearing can be pressed in with the help of a vice and smear of grease. No need to heat anything up - it's not that tight.
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New bearing in place:
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Pulley bolted in place on the tensioner arm:
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Job done 
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The tensioner is then bolted back onto the front of the engine - ideally the fan should be removed to give you enough room to work. An extra pair of hands is also useful to slip the belt back onto the pulleys whilst the tensioner is held back with the 3/8 socket drive, as in the 2nd picture. I didn't take any photos of this stage because I was too busy swearing and trying to make a tool to remove the fan. 1 divorce and 3 upset neighbours later, job done  D3 TDV6 S 2005
Bits replaced so far: Suspension compressor, aircon compressor, wishbones front and rear, all ARB bushes, steering wheel, front wheel bearings, seats.
Previous Landies:
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
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 Fri Jan 29 2010 4:32am |
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Bushwanderer
Member Since: 27 Nov 2007
Location: Sydney, Australia
Posts: 1791
 
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Hi RM,
Great explanation! 
Best Wishes,
Peter The Bearded Dragon
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| Fri Jan 29 2010 5:02am |
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Matty 2332
Member Since: 02 Dec 2008
Location: West Yorkshire
Posts: 381
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Thanks RM, very interesting
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| Fri Jan 29 2010 7:46am |
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discoBizz
Member Since: 20 Sep 2008
Location: Here...
Posts: 1284
 
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Nice one RM!
Cheers!
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| Fri Jan 29 2010 12:25pm |
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MikeT
Member Since: 31 Aug 2008
Location: Lancs
Posts: 241
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great article - well done.
As a foot note, it took my stealer's three, yes 3 visits to do this job under warranty!
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| Fri Jan 29 2010 5:21pm |
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wiggs
Site Sponsor
Member Since: 03 Sep 2006
Location: Sunny Norway this week
Posts: 9079
 
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| Fri Jan 29 2010 5:43pm |
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ronp
Member Since: 29 Nov 2006
Location: in my own space
Posts: 9080
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...... and here's one I made earlier 
 | | Click image to enlarge | If I could think of anything intelligent, poignant or witty, I'd put it here !!!
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1972 Morphy Richards hairdryer 650w
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Exclusive Club Original "Fuji Landmark"
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| Fri Jan 29 2010 5:48pm |
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DISCOJASE
Member Since: 07 Dec 2008
Location: Harrogate
Posts: 351
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Great write up! I had the same problem a few weeks ago, took mine out and was caked in mud  Didnt bother trying to clean it or anything as my local dealer had one it stock (about £30 something). All better now and no squealing now at all! Filming something somewhere...
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| Fri Jan 29 2010 7:44pm |
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ridgeback_moor
Member Since: 11 Mar 2008
Location: Gateway to the Moors
Posts: 1603
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The ball bearings will be on the A30 somewhere between Redruth and Bodmin! Surprisingly, it made less noise without them, but I wouldn't recommend driving far with it like that. Ron, yours looks about the same as mine did - when was that? I think deep mud wading caused mine to eventually fail, but I've done 100,000 miles now so not bad going. D3 TDV6 S 2005
Bits replaced so far: Suspension compressor, aircon compressor, wishbones front and rear, all ARB bushes, steering wheel, front wheel bearings, seats.
Previous Landies:
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
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| Sat Jan 30 2010 3:49am |
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ronp
Member Since: 29 Nov 2006
Location: in my own space
Posts: 9080
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ridgeback_moor wrote: Ron, yours looks about the same as mine did - when was that?
Mine went around 115k last year.
When I first heard it I was pulled up outside an industrial unit in North Tyneside.
Thought the clatter was someone opening up a chain pull roller shutter.
All my bearings would've been strewn down the A19,
as I managed to drive it the 90miles back to North Yorks.
Looking at the condition of it, I was in total amazement that I actually made it If I could think of anything intelligent, poignant or witty, I'd put it here !!!
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1972 Morphy Richards hairdryer 650w
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Exclusive Club Original "Fuji Landmark"
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| Sat Jan 30 2010 12:49pm |
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J@mes
Member Since: 10 Nov 2008
Location: Bomber County
Posts: 2077
 
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Great guide, thanks! Mine has just started to squeal every so often, so I think I'll get it changed before it goes properly! A dog is truly man's best friend, Don't believe me? Well lock your wife and your dog in the boot of your car and 2 hours later open it and see who's happy to see you 
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| Sat Jan 30 2010 1:06pm |
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J@mes
Member Since: 10 Nov 2008
Location: Bomber County
Posts: 2077
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Got any dimensions for your fan removal tool? A dog is truly man's best friend, Don't believe me? Well lock your wife and your dog in the boot of your car and 2 hours later open it and see who's happy to see you
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| Sun Jan 31 2010 6:42pm |
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