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Getting prepared to do my first TB replacement on 2002 ALH, 2004 BEW will be the following weekend unless I can get through both in 1 weekend. All of the TB kits I have run across come with the cam shaft seal. I am questioning how many of you are changing the cam shaft seal out of preventative maintenance (if it is not leaking) just because you are 95% of the way there during TB change. Is the seal known to be a leaker over time. Same question for the BEW cam shaft seal since my BEW will be next.

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On the 2002, they might have used the older rubber seals. The 2004 should have a teflon seal. IMHO, if you have a seal puller you might as well. If not, I wouldn't change it if it's not leaking.

It's not possible to change the BEW seal unless you have the camshaft pulley counterhold tool (I rent them, see the FAQ) because the bolt is really tight and it's not removed during a TB change.
 
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