300 Tdi Timing Belt Question - Defender Source
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  #1  
Old January 20th, 2008, 01:40 AM
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300 Tdi Timing Belt Question

For you Tdi guys in the know...

I was changing the timing belt on my 300Tdi today getting ready for installation into the 110. I noticed that the crankshaft gear did not have the raised edges, or shoulders, which I believe is the earlier gear. But the tensioner gear does have shoulders. I have a new tensioner gear to install, but it has no shoulders. This would leave the new belt running with no shoulders on any of the gears or bearings, and I am guessing that would be bad, right?

So, what do I need to order? A later, modified crankshaft gear with shoulders, or a tensioner gear with the shoulders? Or both? The belt that came off was actually wearing where it was rubbing on one of the shoulders of the tensioner gear so there was a lot of belt fuzzies inside the timing cover.

Obviously I want to do this right, and only once. Any advise most welcome.

Thanks
Brett
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  #2  
Old January 20th, 2008, 06:16 AM
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you'll be needing the later crankshaft gear with the "shoulders" DONT run with out it.

Use the tensioner and idler with no shoulders.
What did you do with the old 2.5 na?
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new expansion complete. Not only are we the only Rover shop in Eliot Maine...now we're also the biggest.

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  #3  
Old January 20th, 2008, 07:02 AM
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If you get STC4096L from George at RDS, you'll know you'll have all the updated parts - thats the part number for the update kit. Its pictured at the link:

http://www.roversdownsouth.com/defender-engine.htm
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  #4  
Old January 20th, 2008, 10:55 AM
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Although this wasn't your original question... MAKE SURE you tighten the crankshaft gear to the proper tension and I'd recommend a bit of locktight as well (those Tdi's vibrate like crazy). Although it wasn't me, the last owner of my Tdi had a dealer change the timing belt and they didn't properly tighten this down. You can imagine the pain that this caused me and was just a couple of degrees away from causing a great deal more.
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Old January 20th, 2008, 02:14 PM
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Quote:
Originally Posted by bharris
Although this wasn't your original question... MAKE SURE you tighten the crankshaft gear to the proper tension and I'd recommend a bit of locktight as well (those Tdi's vibrate like crazy). Although it wasn't me, the last owner of my Tdi had a dealer change the timing belt and they didn't properly tighten this down. You can imagine the pain that this caused me and was just a couple of degrees away from causing a great deal more.
Yikes I would have expected better of Flatiron!

Definitely locktight of some kind. Very generous amount as well.





I have just a used crank gear that you need if you do not want to buy the entire kit- since you have new idler pulleys already.

JP
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  #6  
Old January 20th, 2008, 07:36 PM
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Quote:
Originally Posted by pendy
Yikes I would have expected better of Flatiron!

Definitely locktight of some kind. Very generous amount as well.


JP
I wasn't going to name names .... but yea, I would have expected better of them as well
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Old January 20th, 2008, 08:02 PM
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Thanks for the info fellows. And thanks for the offer of the gear Jim. I have been told that there are two types of gears. The OME one has the shoulders spot welded on and they tend to come off, causing major damage. The other one, by Bearmach, has a forged shoulder which cannot fail. Which one do you have and what do you want for it?

I always thought changing the timing belt on the 300 seemed like a daunting task, but it isn't really that big a deal. Of course, having out of a vehicle and on a bench makes it that much easier.

Matt, the 2.5 NA is still in the truck, but coming out soonish. I am toying with the idea of putting it and the R380 attached to it into my Series 3, but selling them is the most likely option.

Thanks
Brett
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  #8  
Old January 20th, 2008, 11:22 PM
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spot welded one
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  #9  
Old January 21st, 2008, 08:11 PM
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Well, I need to order a few other bits so I will see is I can find one with the forged shoulder. Thanks though.

Brett
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  #10  
Old January 22nd, 2008, 07:11 AM
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Brett, let me know when (if) you decide to sell the 2.5.

I hadn't heard that about the OEM gears failing. Very interesting, and makes sense I suppose. Makes me nervous thinking about how many of those I've installed.
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new expansion complete. Not only are we the only Rover shop in Eliot Maine...now we're also the biggest.

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  #11  
Old January 22nd, 2008, 10:46 AM
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Here's the post on lr4x4 (http://forums.lr4x4.com/index.php?sh...t=#entry217991)
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  #12  
Old January 22nd, 2008, 03:58 PM
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I think that is more from a warped inner timing cover. Or not pushing the belt back far enough when installing and checking to see if it climbs forward. Easy mistake to make when installing a belt in the vehicle. A one piece gear may not fail like that but a misaligned belt will still climb forward and damage itself. IMO

JP
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