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Belts/rollers/tensioners.
https://forums.tipec.net/viewtopic.php?f=25&t=23847		 Page 1 of 2
Author:  pauly [ Wed Mar 06, 2019 12:56 am ]
Post subject:  Belts/rollers/tensioners.
So it's about time I changed the belts etc on my turbo. Full kits don't always specify manufacturers, and I suspect some vendors are over charging for the convenience. The 2 Gates belts are less than £50 on ebay, but I get conflicting part numbers for the 4 INA rollers/tensioners?
Author:  Wh1t3Kn1ght [ Wed Mar 06, 2019 11:42 am ]
Post subject:  Re: Belts/rollers/tensioners.
Hi Pauly,

I just recently did this on my turbo and you are best searching with the Porsche Part numbers as most of the cheaper ebay sellers have the correct Porsche part number against the item.

You can also check the INA catalogue (but I think it has a few errors) -

https://porschedocs.s3.eu-west-2.amazonaws.com/pdf/INA_belt_drive_components_pc.pdf

I bought my tensioners from these folks for a pretty good price -

https://www.ebay.co.uk/itm/PORSCHE-944-2-5-Timing-Belt-Tensioner-87-to-90-INA-94410563106-Quality-New/232562738370?epid=942233707&hash=item3625d1c4c2:g:o2sAAOSwridaDAFZ:rk:2:pf:1

I still have the INA boxes from when I did mine so I've taken the part numbers off the box and entered them below :)

Timing Belt Idler Roller - 94410524104 - INA 532004310
Timing Belt Tensioner Roller - 94410563106 - INA 531072410 (there are two INA part numbers for this but it was identical to the one I removed from my car)
Balance Belt Idler Roller - 94410227706 - INA 532042110
Balance Belt Tensioning Roller - 94410202507 - INA 531005710

Cheers
Author:  Waylander [ Wed Mar 06, 2019 11:47 am ]
Post subject:  Re: Belts/rollers/tensioners.
531 0060 10 944 105 631 10
531 0057 10 944 102 025 07
532 0043 10 944 105 241 04
532 0421 10 944 102 277 06
532 0048 10 944 105 241 02

balance 5463XS
Cam Belt 5094XS
Author:  pauly [ Wed Mar 06, 2019 3:27 pm ]
Post subject:  Re: Belts/rollers/tensioners.
Thanks guys, spot on. This reminded me I'd kept the INA boxes from Promax when I changed the parts last time. Only 14k miles since, but 7.5 years. I have inspected the belts every couple of years, but anyone reading this, do as I do at your own risk.
Author:  Waylander [ Wed Mar 06, 2019 3:40 pm ]
Post subject:  Re: Belts/rollers/tensioners.
I know a man with a 968 tip the belts are 12 years old, I stil cant get him to change them,
Author:  ampegboy1 [ Wed Mar 06, 2019 6:26 pm ]
Post subject:  Re: Belts/rollers/tensioners.
Waylander wrote:
I know a man with a 968 tip the belts are 12 years old, I stil cant get him to change them,

Show him this picture of the cracks and fraying on mine after less than half that time/18,300 miles, hopefully he'll reconsider - they looked alright when I checked them in-situ! :shock:
Image

Michael
Author:  pauly [ Wed Mar 06, 2019 7:37 pm ]
Post subject:  Re: Belts/rollers/tensioners.
What brand are those belts?
Author:  ampegboy1 [ Wed Mar 06, 2019 8:05 pm ]
Post subject:  Re: Belts/rollers/tensioners.
The timing belt was a Porsche-branded Dayco belt (both logos printed on the belt), but I can't read what's left of any markings on the balance shaft belt. The garage who changed it said at the time that they would only fit Porsche belts, I assume the balance shaft belt was a Porsche/Dayco belt as well.

Michael
Author:  Wh1t3Kn1ght [ Wed Mar 06, 2019 10:37 pm ]
Post subject:  Re: Belts/rollers/tensioners.
pauly wrote:
Thanks guys, spot on. This reminded me I'd kept the INA boxes from Promax when I changed the parts last time. Only 14k miles since, but 7.5 years. I have inspected the belts every couple of years, but anyone reading this, do as I do at your own risk.


Mine were last done by Promax back in 2011 (car has been off the road though for almost 5 years)
Author:  pauly [ Thu Mar 07, 2019 1:44 am ]
Post subject:  Re: Belts/rollers/tensioners.
Waylander wrote:
I know a man with a 968 tip the belts are 12 years old, I stil cant get him to change them,


:shock: How much is a 968 head repair/cams these days?
Author:  Waylander [ Thu Mar 07, 2019 7:56 am ]
Post subject:  Re: Belts/rollers/tensioners.
Cams are £1200 a pair, the rest with a head refurb 4K ish
Author:  pauly [ Thu Mar 07, 2019 2:18 pm ]
Post subject:  Re: Belts/rollers/tensioners.
Waylander wrote:
Cams are £1200 a pair, the rest with a head refurb 4K ish


When I nearly bought a 968 from a Porsche Indy 11 or 12 years ago I asked him about the cams, he showed me how much he could buy them for, and I think they were about £350. Back on topic I ordered the 4 INA rollers/tensioners and 2 Gates belts today. The ebay £133 is less than the Promax kit 8 years ago.
Author:  Waylander [ Thu Mar 07, 2019 3:48 pm ]
Post subject:  Re: Belts/rollers/tensioners.
pauly wrote:
Waylander wrote:
Cams are £1200 a pair, the rest with a head refurb 4K ish


When I nearly bought a 968 from a Porsche Indy 11 or 12 years ago I asked him about the cams, he showed me how much he could buy them for, and I think they were about £350. Back on topic I ordered the 4 INA rollers/tensioners and 2 Gates belts today. The ebay £133 is less than the Promax kit 8 years ago.


I just checked PET, the cams are now £947.00 each, so plus your head set,all the other bits and bobs for a full head refresh

Set of Valve springs 16 at £29.00 Guides and seats cut, I think 4K is a bit on the conservative side
Author:  pauly [ Thu Mar 07, 2019 6:11 pm ]
Post subject:  Re: Belts/rollers/tensioners.
Waylander wrote:
pauly wrote:
Waylander wrote:
Cams are £1200 a pair, the rest with a head refurb 4K ish


When I nearly bought a 968 from a Porsche Indy 11 or 12 years ago I asked him about the cams, he showed me how much he could buy them for, and I think they were about £350. Back on topic I ordered the 4 INA rollers/tensioners and 2 Gates belts today. The ebay £133 is less than the Promax kit 8 years ago.


I just checked PET, the cams are now £947.00 each, so plus your head set,all the other bits and bobs for a full head refresh

Set of Valve springs 16 at £29.00 Guides and seats cut, I think 4K is a bit on the conservative side


Close to the point for sticking on a 2.7 head, some low comp pistons, and converting it to turbocharged :) .
Author:  tr7v8 [ Tue Mar 12, 2019 10:15 am ]
Post subject:  Re: Belts/rollers/tensioners.
I have heard of 944 16V & 968 cambelt failure totaling the engine. Valves damaging bores when they clash & also the head breaks irreparably. 8V normally damage the valve guides as well as the valves.
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