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Join Date: Oct 2004
Location: minneapolis MN
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Chain tensioner question

I'm looking to find a way to NOT use the Carrera tensioners. I can't scrap up the change for them right now and I'm in the midst of a full rebuild. The originals haven't failed and they lasted 35 years. Do the make a rebuild kit for these ('70 911T)??
THanks in Advance
Nabil

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Old 09-16-2006, 09:37 AM
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Yes, or put on the collars.
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Old 09-17-2006, 06:01 AM
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Or you could go with the mechanical tensioners... but they require more maintenance.
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Old 09-17-2006, 06:56 AM
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I would rebuild the tensioners and use the collars for added safety.
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Old 09-17-2006, 07:55 AM
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Nabil,

Yes, the tensioners can be rebuilt. Kits, pn# 911.105.901.01 are available from several sources, including Pelican:

CHAIN ADJ.REPAIR KIT
- This is a special-order, non-returnable, part
(availability and shipping charges may vary).
OEM-91110590101 $22.51

My suggestions are:

1. Install safety collars ASAP!

2. Install five new black and one brown chain ramp ASAP! Crumbling chain ramps can cause as much damage as a failed tensioner!

3. Acquire rebuild kits and plan on rebuilding the existing tensioners.

4. Plan on replacing your chain wheel supports [idler arms] with the 1980.5+ style, double bushing versions as funds become available. PN# 930.105.509.00 & 930.105.510.00.

When the double-bushing idler arms are installed ... you have two choices: mill off 10.0 mm from the back side of your tensioner mounts to clear the 'thicker' idler arms, or install 930.105.053.00 -- 1980.5+ tensioners. Getting your tensioners milled is not that difficult!

Good luck!
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Old 09-17-2006, 08:24 AM
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Thanks a million for the great heads-up fellas. I sold a '70 T coupe with a stuck motor (some friend I am) to a buddy for $3k, he's mechanically inclined but zero for Porsche experience. I've become his go-to guy for everything (he doesn't own a computer, lawn service guy). I don't mind at all as its been a great learning experience for me and its always fun to have a buddy who shares the same obsession. He got most of his motor stuff back from Olie's (I recommended them based on there reputation, and if something goes wrong with the engine its kinda on my head!) after the $4.2k bill from them (all case work, heads redone and ported and polished) and $1.3k for all the other hardware/gaskets from our host, he's getting tight!! can't blame him, so when he asked me about those I could have been lazy and said "gotta get the Carrera Tensioner" but I knew there had to be another way out! Hopefully we get it back together in time to actually drive it once or twice before it snows!! My guessis that he will be really hard pressed for motivation to bring it back to viper green and tidy up the interior this winter if all he got to do was take it apart and blow a bunch of $$'s on it!! Stay tuned, if it starts and drives soon I'll post some pics of the progress. I'll post some pics of the engine parts now that there back from Olie's, they did some really pretty work, just not cheap. I guess you get what you pay for.
Nabil
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Old 09-17-2006, 07:05 PM
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I rebuilt mine with the above mentioned kit. Not a simple process but I thought I got them right. They collapsed not much later. I'm glad I had the safety collars. I have spoken to others who had the same experience. I now put 930 tensioners in. Carrera tensioners have been know to fail as well.

joe
Old 09-17-2006, 07:10 PM
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Targa T,
Are the 930 tensioners 'plug and play" or did they require some "milling" as well? How are they better than the originals? thanks
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Old 09-17-2006, 09:26 PM
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This thread is now shown on the Pelican Parts list next to 911 105 901 01-the rebuild kit for timing chain tensioners-the kit is NLA from Pelican but is available from others. Any reason not to use it? My chains have started rattling on my 82 SC.
Thanks to all for responding.

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Old 03-04-2009, 03:45 PM
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