Dragging chain out of garbage can. Kno what that means?

I'm kind of new at this...does my '78 SC have the double-bushing chain sprockets?

Another question. From looking over the procedure, I'm wondering if it's necessary to buy some kind of device to hold the chain in place. I think the Pelican article mentioned tying them with wire or sticking in a staub of wood or something...

The parts guy at the Porsche dealership says chaines are changed only at engine rebuild. Thought I was crazy for doubting the chain. After the tensioners fill with oil on morning startup (couple seconds), that whole system is quiet as a mouse. 93K makes your '83 a toddler. Not broke in yet.

The tensioner upgrade is a pretty easy installation.

I used stainless steel bolts on the exhaust of my SC and it was a mistake. They all seized and twisted and sheared off upon removal, weeks later. Perhaps they were the wrong grade, but this result is not surprizing to many who hear the story. Steel bolts. And anti-seize.

All high performance motors are 'interference' motors. There are not many motors made in the last twenty years that can survive a broken timing belt/chain. Some, but not many.

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'83 SC

Shaken,

I think I upgraded my way around the tensioner problem -- it's a 1993 engine.

So, of course I have upgraded: the distibutor belt vent, and bypassed the other problem areas by replacing the flywheel and eliminating the power steering pump.

Hope I haven't missed anything.

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Jack Olsen
1973 911 T (3.6) sunroof coupe
jackolsen@mediaone.net

Shake,

I had that exactly same problem on my car, no carrera tensioners, at iddle it would make a big chain rattle sound.....but over 2k rpm the motor sound perfect.
I took to my mechanic and he said there is a kind of hydralic piston that keeps the chain tensioned. Some times it looses preasure. So he just fixed it preasurising it,with out droping the motor or replacing any parts. It took him half a day.
This hapened 1 year ago....and I didnīt have a problem with the chains again.....

Lee,

No, the SCs didn't get the double bushing carriers until mid-year 1980 production.

And, no, you don't have to buy a special tool to hold the chains in place. Safety wire, or Wire Ties can be used in place of a tool ... if you are careful!

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Warren Hall
1973 911S Targa

Ok, it's saturday and I have decided to poke around to see if the tensioner has failed. I've got the cover off and started the engine and everything looks fine, no slack in the chain. No broken ramps, tensioner is working, no noise...what gives?

Chris

Now I'm wondering if the rattling sound might have been a leaking exhaust between the heat exchangers and the muffler. While having the pan off, I decided to pull the valance and put on this anza type dual in dual out, twin pipe exhaust. I am no longer hearing the rattling sound. I noticed on the muffler flange that exhaust had been leaking..Could this have been the culprit? Car is running OK but I think I may have some bad plug wires because it is still missing between 2000-3000rpm and I can see some arcing on the plug wires near the dust cap.

Chris,

Sounds like you found your rattle! If your wires are bad, the actual wire is breaking down, then you could replace the wire with aftermarket bulk 7 mm wire. But, you still need to check the Beru connectors for good continuity in the 3-4000 Ohm range! If multiple Beru's are bad, you may want to get a '65-'73 unshielded set as a replacement. Your braid from the old set could be installed on the early set, or left off ... it isn't really needed.

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Warren Hall
1973 911S Targa

Ok, I decided for my own sanity to go forward with the Carrerra tensioner update to my 1974 Coupe. Hendrick Porsche says the right side of the kit has been back ordered from Germany since November with no ETA available. While returning from a business trip today I routed the return to stop by Stuttgart Haus in Mooresville, NC. The owner Bill had 2 new kits for $420 ea and 1 used kit off a dismantled Carrerra for $270.00. I opted for the new kit. I wish Pelican would have had it, I would rather support this site, but at least I am supporting the independent shop owner (to the tune of the extra $$$). It turns out that the owner, Bill Swart is a really nice guy and is a Drivers Ed instructor with the Carolinas Region PCA. I felt much better after the purchase to find out that his favorite wine is Chateau Ste. Michelle, the company that I work for. I haven't given him much business in the past but after looking around his shop...and drooling after all the salvaged parts he has collected, I'll add his shop to my location for new and used parts. (Pelican 1st). Wish me luck...now to print out the tech article...

Chris