Imo000

........and you'll never know the belt is too loose until its all too late either.

Norton928

Based on it's design, does the ProKen tensioner eleminate the need to check/retension a new belt?

Leon Speed

Thanks for the tips and links guys. Thanks for the porkensioner tip. I am kind of leaning towards doing a complete front end refresh. Need to think it through some more.

Dwayne's page is amazing. Looks like you can do it on a rainy Sunday afternoon with one hand turning the wrench en the other holding a cold beer. Of course that's with an unrealistically clean engine, all tools at hand (even the odd ones) and no bolts breaking.

Landseer

Notice, though, in several shots his block has been patched due to water pump failure.

cold_beer839

It keeps the proper amount of tension on the belt. As the block expands with heat or belt stretches with age, it extends or retracts to keep proper amount of tension on the TB. This takes pressure off the cam gears and water pump that could result from over-tensioning the stock tensioner. Just replace the TB and PKsn'r pulley every 5 years, regardless of how they look.

Internet engineers, you can't take them anywhere......

Dean_Fuller

What did 928 owners do before the addition of the TB warning light? I guess thats a reason to avoid ownership of those models...... I think not.

I'm fine running the sealed Audi system...change on time...In my mind when you hold both in you hands...the Audi tensioner has less to go wrong.

Landseer

I've got 4 stock ones and a spare rebuild kit.
Pretty simple and inexpensive refurb.
Dwayne's pictures really are helpful if its the first time you've done a rebuild.
Kind of a non-issue to me once you know its maintained.

Am watching for changes in tracking on all of them and lights too on the later cars.

Theres one here with the audi-based system, too.

Imo000

Nahhhh... try first had experience.

I had a couple of early 90's Mitsubishi 2.0L's that have the same tensioner design and at first glance they are very close to the Audi units (even made comments regarding this when Ken was first developing the kit). The Mitsubishi tensioners were well known for loosing pressure and getting the belt so loose that it would jump. Even the ones that were operating as designed, had major issues when the factory turbochanrged engines received heavy modifications. The two engines I had and worked on kept loosing the pressure and I resorted to manually over ride it and make it into a static tensioner system. My neighbour loost several valves on 3 seperate occasions to this on his modified Talon TSI. This was over 6 years ago but since the Audi pensioner works on the same principle, re instating the factory belt warning light wouldn't be a bad idea.

cold_beer839

That's comparing apples to oranges. I trust the system Ken has developed and tested. They have been on countless cars for a few years now with no issues reported.

Everyone has varying opinions on everything about these cars, and I respect yours. The stock tensioner is a time tested design, but there is a better system available now, IMO.

It would be nice to have the warning light integrated into the PKsn'r for added engine safety and peace of mind though.

NoVector

Has anyone had a PKtensioner failure? I think they've been on the street since 2008. (not counting Audi's...) The way the pulley flops around on the tensioner, it doesn't seem like it would take much to put a sensor that would ground if the pulley moved too far. Maybe that will be on the new and improved model when we all replace them in a couple years.

dprantl

I have been running one for 1.5 years and 15k miles on a boosted engine without problems so far.

Dan
'91 928GT S/C 475hp/460lb.ft

Landseer

I haven't had a failure of a stock tensioner / belt either. (talk about tempting the fates)

Norton928

Anyone track cars out there usng the PKtensioner? I do some lapping from time to time and would be interested in switching to this product if it has a good 'track' record, pardon the pun.

Leon Speed

What happened, I can't express my feelings in a title anymore?

cold_beer839

Only in folk song titles. And you must sing as well.