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911uk.com Forum Index > 997 (2004 - 2012) > 997 gen 2 drive belt Tensioner failure .

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deMort
Long Beach

Joined: 21 Mar 2015
Posts: 6632
Location: Brighton

Posted: Sun Feb 03, 2019 8:34 pm Post subject: 997 gen 2 drive belt Tensioner failure .

See the image below .. No.1 . T50 bolt that locates it. No.2 the pivot , it looks like a washer but isnt .. its a pivot . No.3 the 30 or 32mm nut you adjust it with , i forget which size off hand. You move No 3 .. if the bolt moves then No.2 is siezed .. you need the top part of the tensioner replaceing . The lower damper only needs changeing if its leaking , again the roller pully is optional . Damage can occur if its left .. think of the bolt doing up or unwinding as it moves , and this is what happens .. 4k RPM and it lets go .. expensive . i dont want to scare but i have seen an engine replacement due to this .. only once and thats since the Gen 2 came out , but it snapped the block fixing for this part ... ( warrenty ) I will say that a lot of mechanics out there dont realise this ... a lot do .. but not all ... Its an easy check to prove as above . Just an advise as its a silly item that can be easily be over looked . Gratitude to Windy101 for the image . EDIT .. bolts are T50 not T30 .. for some reason i had it in my head they were T30 .. geting old i guess _________________ . My Daughter's Crowdfunding page Here 7pm - 9pm Now At An Indy. Last edited by deMort on Fri Feb 22, 2019 8:19 pm; edited 1 time in total

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Windy101
Monza

Joined: 05 Jun 2015
Posts: 231

Posted: Sun Feb 03, 2019 9:01 pm Post subject:

I would just like to add my sentiments to those many others have already expressed. deMort, you are a total gentleman and helpful beyond measure.

HSC911
Long Beach

Joined: 23 Jul 2014
Posts: 6456
Location: Bedford

Posted: Mon Feb 04, 2019 1:20 am Post subject:

Windy101
Monza

Joined: 05 Jun 2015
Posts: 231

Posted: Fri Feb 22, 2019 7:14 pm Post subject:

I have managed to DIY this job with the help of advice from deMort and the following guides. https://rennlist.com/forums/997-forum/986494-do-we-have-a-diy-on-belt-tensioner-replacement-for-a-997-2-a.html https://rennlist.com/forums/997-forum/991008-belt-tensioner-replacement-997-2-a.html

deMort
Long Beach

Joined: 21 Mar 2015
Posts: 6632
Location: Brighton

Posted: Fri Feb 22, 2019 8:20 pm Post subject:

Edited my original post to reflect the bolts are T50 .. no idea why i thought they were T30 .. getting old i guess !! _________________ . My Daughter's Crowdfunding page Here 7pm - 9pm Now At An Indy.

MarkC4S
Monza

Joined: 05 Jul 2016
Posts: 184

Posted: Tue May 14, 2019 9:18 am Post subject:

Thanks to Iain for his wise and informed advice on this issue.

Windy101
Monza

Joined: 05 Jun 2015
Posts: 231

Posted: Tue May 14, 2019 10:34 am Post subject:

MarkC4S wrote:

Thanks to Iain for his wise and informed advice on this issue.

My problem was subtly different, my tensioner was slow to return, I guess it was partially siezed.

Thanks again DeMort for the help and advice.

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