Tensioner upgrade

Skytrooper · Skytrooper's Garage

My '76 does not have the Carrera tensioner upgrade. This would be an excellent winter project for me. I do however have a couple questions.

What parts currently installed are reusable ? ( assuming no mechanical damage exists)

What would be the best " while you are in there" tasks that could be done in conjuction ?

I am planning to replace some seals and gaskets (once I get the engine out I will be better able to assess which ones), so this will most likely last most of the winter.

Funding is a factor so be gentle.

Fast Corners · 10-01-2009, 08:21 AM

Do you know when the last re-build was on the engine? This may set the tone of the "while you are in there" question. Assuming that the engine is in good running order, the Carrera Update kit has almost everything you need however, I would recommend upgrading the idler arms while you are at it. The spacers that allow the old stlye idlers work with the new tensioners are not the best way to go. You should replace the chain ramps (low cost so why not) and depending on how many miles are on the chains you should consider them too. If you use a masterlink chain you will not have to split the case. BTW, if you replace the chains you will have to rest the cam timing which will cost you extra in getting the right tools to do the job correctly.

Other than that you should take the opportunity to replace failing seals, vacuum lines, intake boots (is still CIS equipped) and adjust the valves. If you have oil leaks at the rocker shafts then it would be a great time to install the rocker shaft seals (which are a great upgrade an makes the motor much dryer. Since you have a Mag case it would also be worth while to check the head studs to see if you have either a pulled or broken stud. Keep us informed and don't hesitate to ask questions.

Skytrooper · Skytrooper's Garage

Do you have a part number for the idler arms ?

Chain ramps are inexpensive...

Car still has looks to be original fuel injection system (CIS?)

Rocker shaft seals...do you have a part number for those also ?

I left a message with the german auto repair shop that I bought the car from, to find out when last rebuild was. They owned the car for a coupe years and were doing work on it all along. It looks like the head stud nuts are brand new, but who knows until I get confirmation.

I definitely want to do as much as I can "while I am in there" to help preclude problems down the road.

kenikh · 10-01-2009, 08:55 AM

930 tensioners with collars are extremely reliable and pretty inexpensive. If you have find a used set (I have a box full, hint hint), all you need is an inexpensive rebuild kit and you are off and running.

BURN-BROS · 10-01-2009, 09:26 AM

The real upgrade are the wide tensioner arms.

Fast Corners · 10-01-2009, 09:35 AM

The idler arms are 930-105-510-00 and 930-105-509-00 and total in at about $400. The ramps are about $7 each and you need 6 (5 black & 1 Brown). The rocker shaft seals are on the pelican web site and are $4 each but they work great for getting rid of oil leaks. and help with wandering rocker shafts.

quicksix · quicksix's Garage

Hey Kenik, I am looking for a rebuild kit for my tensioners where do you get them from?

Eagledriver · 10-02-2009, 08:49 PM

See if you can find the idler arms from a used parts place. I got mine at Partsheaven. I don't like to put new chains on old sprockets. If the rocker shafts aren't leaking don't mess with them.

-Andy

kenikh · 10-06-2009, 03:34 PM

Quote:

Originally Posted by quicksix

Hey Kenik, I am looking for a rebuild kit for my tensioners where do you get them from?

Sorry for going missing - here's the part numer:

911-105-901-01

Looks like Pelican can't get it anymore, but it looks like EBS and Porsche still have them.

quicksix · quicksix's Garage

Thanks for the number, I will try EBS,I tried my local dealer and they were not able/willing to get them.

Henry Schmidt · Henry Schmidt's Garage

Quote:

Originally Posted by Fast Corners

The idler arms are 930-105-510-00 and 930-105-509-00 and total in at about $400. The ramps are about $7 each and you need 6 (5 black & 1 Brown). The rocker shaft seals are on the pelican web site and are $4 each but they work great for getting rid of oil leaks. and help with wandering rocker shafts.

Or there is another option.
Supertec idler arms. $ 230 / pair exchange. race proven and 50,000+ miles of testing.
Available now.

RoninLB · 10-09-2009, 06:37 PM

external oil feed line to case mounting kit about $25