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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Sun Feb 03, 2019 8:34 pm    Post subject: 997 gen 2 drive belt Tensioner failure . Reply with quote

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 Smile
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Last edited by deMort on Fri Feb 22, 2019 8:19 pm; edited 1 time in total
 



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Windy101
Spa-Francorchamps


Joined: 05 Jun 2015
Posts: 286



PostPosted: Sun Feb 03, 2019 9:01 pm    Post subject: Reply with quote

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.
 
  
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HSC911
Long Beach


Joined: 23 Jul 2014
Posts: 6754
Location: Bedford


PostPosted: Mon Feb 04, 2019 1:20 am    Post subject: Reply with quote

Yeah
 
  
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Windy101
Spa-Francorchamps


Joined: 05 Jun 2015
Posts: 286



PostPosted: Fri Feb 22, 2019 7:14 pm    Post subject: Reply with quote

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
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Fri Feb 22, 2019 8:20 pm    Post subject: Reply with quote

Edited my original post to reflect the bolts are T50 .. no idea why i thought they were T30 .. getting old i guess !!
_________________
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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MarkC4S
Monza


Joined: 05 Jul 2016
Posts: 198



PostPosted: Tue May 14, 2019 9:18 am    Post subject: Reply with quote

Thanks to Iain for his wise and informed advice on this issue.
 
  
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Windy101
Spa-Francorchamps


Joined: 05 Jun 2015
Posts: 286



PostPosted: Tue May 14, 2019 10:34 am    Post subject: Reply with quote

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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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Sun Jun 16, 2019 7:41 pm    Post subject: Reply with quote

A slightly better picture of the tensioner i took from a 991 ... you can see the Torx bolt , the Washer which is a pivot and the " 30 " mm head size to move it .

Once again , 30 mm spanner and turn the tensioner .. if the torx bolt moves then its seized and needs replacing .

I'll just add .. Boxster / Cayman and 991 don't tend to suffer from this due to the protected location .. Gen 2 997 do though .
_________________
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 



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hermes
Silverstone


Joined: 08 May 2017
Posts: 122



PostPosted: Mon Jun 17, 2019 5:11 am    Post subject: Reply with quote

So would this also apply to the Gen 2 3.8 in the Cayman GT4?

Should I be asking the OPC to check something?

Cheers
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Mon Jun 17, 2019 7:15 pm    Post subject: Reply with quote

hermes wrote:
So would this also apply to the Gen 2 3.8 in the Cayman GT4?

Should I be asking the OPC to check something?

Cheers


Yours will be the same , pretty much gen 2 onwards uses this system but its only the 997 gen 2 that seems to suffer from a seized tensioner ..

My last post above mentioned this Smile

It's probably due to the fact all the other models have more protection or basically .. lumps of metal in the way of the tensioner that stop water ingress and these corroding .

There is nothing you need to do or have anyone check imho .

Every garage should know full well about this problem by now but owing to the fact i've had a couple of messages about these still being overlooked when a service or a belt change has been done then i keep banging on about it Very Happy

Prevention is far better than a fix afterwards !!
_________________
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My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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hermes
Silverstone


Joined: 08 May 2017
Posts: 122



PostPosted: Tue Jun 18, 2019 5:06 am    Post subject: Reply with quote

thumbsup
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Thu Jun 27, 2019 7:14 pm    Post subject: Reply with quote

Just an update with some better pictures to explain this fault .

Yup i've seen yet another one of these being seized this week .

Images below explain it , i marked the bush that should pivot so you can see it moves ..

This car i moved the tensioner and it stayed where i moved it to .. belt was very slack as after this .. it was seized !
_________________
.
My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 



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PJ997
Newbie


Joined: 30 May 2016
Posts: 37



PostPosted: Fri Jun 28, 2019 2:03 pm    Post subject: Reply with quote

What is the part under of the actual bit that gets seized (i.e. the bit I need to order)? I ask as the is says part 9A1 10221100 is a roller, rather than the metal pivot thing. Phil UPDATE . . . . ignore me. It also says 'Lever' so I'm being stupid.
 



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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Fri Jun 28, 2019 6:45 pm    Post subject: Reply with quote

Its number one .. i would change the bolts as well just to be safe .. any obvious leaks from the tensioner and that as well .. tensioner is no.3 .
_________________
.
My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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P9XX
Newbie


Joined: 04 Oct 2018
Posts: 24
Location: Hertfordshire


PostPosted: Wed Jul 03, 2019 9:23 pm    Post subject: Reply with quote

Checked mine after visit to Precision Porsche last Saturday.

Unfortunately, turning the 30 mm hex clockwise, the pivot bolt turned as well.
Therefore seized but not broken yet.
The tensioner had to be turned back with the spanner, it should spring back.

My car is 2008, 40,000 miles.

My local indie has seen several instances of completely snapped off tensioners.
Bolt No. 4 in the parts diagram snaps behind the tensioner.
Worst case, the whole water pump and housing to which the tensioner lever is attached has to be replaced, due to damaged threads.

New tensioner to be fitted next week.
_________________
2008 997.2 C2S PDK Basalt Black
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Thu Jul 04, 2019 7:19 pm    Post subject: Reply with quote

And this is why i keep banging on about this fault .. excellent news you checked it and found an issue .. well not excellent but better to find out before something happened !

Air box removal wasn't hard i take it Smile

Btw .. a pleasure to chat on saturday , hopefully you enjoyed the chat and the look around the workshop .
_________________
.
My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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PS1000
Newbie


Joined: 25 Nov 2016
Posts: 40



PostPosted: Thu Jul 11, 2019 3:06 pm    Post subject: Thanks Iain Reply with quote

Extremely helpful post as always. Checked mine today and all is well

(Dead easy to check folks - really recommend doing it just in case)

Regards

Pete
 
  
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PJ997
Newbie


Joined: 30 May 2016
Posts: 37



PostPosted: Tue Jul 23, 2019 9:24 am    Post subject: Reply with quote

Have you got any tips on reinstalling the tensioner and lever? Getting it out was a complete ball ache as there’s hardly any room to get the two bolts out. For reinstalling I’m thinking the belt needs to be off the roller so that there is absolutely no tension in the mechanism, I loosely put the top bolt in, then lift the lever up and down while trying to locate the bottom bolt . . . sound right? I’m dreading it!

In terms of tools . . .. .
I had to grind a torx bit down in order to get the top bolt out (ring spanner, with a bar to loosen, then slowly remove using mole grips)
The bottom bolt was a torx bit taped to a ring spanner, with a bar to loosen, followed by torx in ratchet spanner (taped one side to stop it falling out) taped to a big screwdriver . . . removing a click at a time!
. . . . has anyone got a better suggestion in terms of tools?

Any help appreciated.

Phil
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7585
Location: Brighton


PostPosted: Tue Jul 23, 2019 6:10 pm    Post subject: Reply with quote

Sorry for the late reply ... i'm afraid i work all day and as such am only ever here for 2 hrs of an evening .

The belt should be well out of the way when refitting the tensioner . its basically a case of screwing in the top bolt loose then crawling underneath and fitting the bottom tensioner bolt .. i can just about get my hands in there so dont have too much trouble .

A cut down torx and i use a spanner on it to undo .. then wind out with fingers ... A pry bar levering the engine carrier bar to give a few more mms of clearance also helps .

To refit the belt then you use the 30 mm spanner to move the tensioner down and then pull the belt over the idler wheel .. you have to make sure the belt is seated in all the pulleys otherwise you won't come close to refitting it .
_________________
.
My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
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PJ997
Newbie


Joined: 30 May 2016
Posts: 37



PostPosted: Wed Jul 24, 2019 8:09 am    Post subject: Reply with quote

Cheers DeMort . . . . you're a star. I didn't think I could get the bottom bolt from underneath, but you can (just about - and after removing a H&S exhaust hanger).
Thanks
 
  
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