Timing belt gear upgrade mileage question

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Timing belt gear upgrade mileage question

Postby 88a5tq » Sun Jun 11, 2017 7:11 pm

So for you guys running these 3b or AAN engines with upgraded, larger cam gears, are you reducing your service mileage for the timing belt. This is for those of you whole cheaped out and didn't buy a larger cf cover hah.
Image
I've cut my stock belt cover off at the top as shown. Pretty common "adjustment" lol.
TIA
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Re: Timing belt gear upgrade mileage question

Postby 88a5tq » Fri Jul 21, 2017 8:12 am

I was advised by a gentleman with the same open air tb scenario that it has made no difference for his belt life. This was on the classic Audi fb page FYI.
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Re: Timing belt gear upgrade mileage question

Postby 88a5tq » Mon Aug 07, 2017 11:41 am

Where do I sign up?!
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Re: Timing belt gear upgrade mileage question

Postby 88a5tq » Fri Sep 01, 2017 11:12 am

An Audi service tech recently brought it to my attention he has seen no negative effects from running no TB cover on the I5's for the full service interval. That was about an hour after I blew $200 on the "bumped out" efiexpress cover lol
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Re: Timing belt gear upgrade mileage question

Postby audifreakjim » Fri Sep 01, 2017 11:59 am

It may not reduce the wear on the belt, but you always run the risk of dropping a bolt in there or a pebble getting in there and shredding the belt. Run the cover if you can :)
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Re: Timing belt gear upgrade mileage question

Postby 88a5tq » Fri Sep 01, 2017 12:06 pm

Exactly how I rationalized my purchase when I read the anecdote lol
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Re: Timing belt gear upgrade mileage question

Postby carl » Mon Sep 04, 2017 11:54 am

audifreakjim wrote:risk of dropping a bolt in there or a pebble getting in there and shredding the belt. Run the cover if you can :)

:metoo:
...or a rodent storing nuts or if you have cold winters and park properly, ice/freezing rain finding it's way to freeze on the crank cog.
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Re: Timing belt gear upgrade mileage question

Postby 88a5tq » Mon Sep 04, 2017 12:01 pm

Anybody run the bumped out efiexpress cf cover over an Autotech 16v gear from 034? Also if so, are you running it with extra spacers beyond the long steel ones, rubber grommets, and the Alan head nuts?
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Re: Timing belt gear upgrade mileage question

Postby PRY4SNO » Mon Sep 04, 2017 4:00 pm

Aron designed the "bumped out" cover to fit the adjustable units such as the Tomis cam gear. If yours is similar in profile, it should fit fine.
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Re: Timing belt gear upgrade mileage question

Postby 88a5tq » Mon Sep 04, 2017 4:34 pm

Ya that's kind of why I'm worried. I didn't know which gear it was made for. I'll have to scavenge the Googles for more info and maybe some profile views if available. Thanks for the heads up, PRAY
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Re: Timing belt gear upgrade mileage question

Postby PRY4SNO » Tue Sep 05, 2017 11:11 pm

Have a look on the group buy thread on S2F re: 3B kevlar covers, IIRC. Think that's the one I kickstarted, back in the day.
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Re: Timing belt gear upgrade mileage question

Postby 88a5tq » Wed Sep 06, 2017 10:39 am

Those look awesome! One thing that's killing me is not being able to find this build thread using reverse image searching :wah:
adj3bcambelt_zps9a7b31d2.jpg
adj3bcambelt_zps9a7b31d2.jpg (112.62 KiB) Viewed 511 times


I'm being told that the efiexpress cover should fit over the 16v Autotech gear since it's not terribly unique in design from the others available.

My main concern was really it's center section since when I would push down on the cover, every part would flex except that center area. It's supposed to fit fine though so I will do a start up later today with the cover nuts loose and slowly tighten them while observing any noises.

I am surprised how common the belt "flapping" against the inside cover is. I would like to diminish belt damage from it before changing the TB components of course. Maybe "my belt needs cinched up slightly" :hammer: between the cam gear and water pump lol
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