Be on the look out.

[Henry Schmidt]

It seems that a new product has reached our shores that purports to be "OE" Porsche rockers.
They are not and in fact are a prime example of the challenges of sourcing high quality parts for air-cooled Porsche projects.
The give away is the bulky nature of the product. It seems that the material is incompatible with Porsche cams hence, rapid wear and eventual cam and rocker failure.


Picture courtesy of DRC.

[proporsche]

good to know Henry..the top is the original ,right?

Ivan

[charlie.tango]

Originally Posted by Henry Schmidt

It seems that a new product has reached our shores that purports to be "OE" Porsche rockers.
They are not and in fact are a prime example of the challenges of sourcing high quality parts for air-cooled Porsche projects.
The give away is the bulky nature of the product. It seems that the material is incompatible with Porsche cams hence, rapid wear and eventual cam and rocker failure.


Picture courtesy of DRC.

What brand is it and where was it bought?

[jpnovak]

Those are wiped clean... thanks Henry for the heads up.

[Henry Schmidt]

Originally Posted by proporsche

good to know Henry..the top is the original ,right?

Ivan

The top one is an early factory rocker.
Over the years there have been many different styles and manufacturers.
The top one would be considered one of the best candidates for refurbishing.
Very early cast rockers with no bushing are the best (IMHO) but require an additional step during rebuild.

[Henry Schmidt]

Originally Posted by charlie.tango

What brand is it and where was it bought?

My understanding is that it came from Stoddard. That is of course second hand information so take it with a grain of salt.
A little more research shows them for sale on Pelican as genuine Porsche parts.

PLEASE BARE IN MIND: THIS IS NOT A CRITICISM OF STODDARD OR PELICAN. IT JUST SUGGESTS THAT PORSCHE'S PARTS CHAIN IS NOT INFALLIBLE.




https://www.pelicanparts.com/More_Info/93010504305OEM.htm?pn=930-105-043-05-OEM&bt=Y&fs=0&SVSVSI=0787

[proporsche]

Henry..i have plenty of semi damaged rockers, where do you to refurbish..you do it??

thanx

Ivan

[FrenchToast]

Editor's note: This post was written based on an incorrect assumption.

Respectfully, if you want genuine parts, get them from a Porsche-approved dealer.

In most cases, it is economically impossible for another vendor to have a better price (excluding tax and shipping) than the dealer for a genuine part. Unless it is a slight benefit from a bulk order, a warehouse overstock situation, the vendor is taking a loss, etc.

A third party vendor is buying parts from a dealer or direct from Porsche because in most cases the component manufacturer can only sell a Porsche part, built to Porsche's specification, to Porsche. There are of course exceptions.

With any third party vendor you always run the risk of a non-genuine article.

Originally Posted by Henry Schmidt

PLEASE BARE IN MIND: THIS IS NOT A CRITICISM OF STODDARD OR PELICAN. IT JUST SUGGESTS THAT PORSCHE'S PARTS CHAIN IS NOT INFALLIBLE.

The parts chain to which you refer is that of the open market, not of Porsche's. Stoddard or Pelican may sell some genuine parts but have no legal obligation to do so.

You don't need a license to be a parts vendor. Anyone can go to the dealer, buy 1,000 things, and sell them under another name. Or, they can sell fake things and call them genuine. Or, maybe (but rarely) they make better things.

I've seen pictures of fake parts in convincing (but still fake) Porsche packaging. As an end user you must research the quality you want.

FWIW, the bushings in the fake rockers aren't even centered in the casting.

[Henry Schmidt]

Originally Posted by FrenchToast

Respectfully, if you want genuine parts, get them from the dealer.

In most cases, it economically impossible for another vendor to have a better price than the dealer for a genuine part. Unless it is a slight benefit from a bulk order, a warehouse overstock situation, the vendor is taking a loss, etc.

A third party vendor is buying parts from a dealer or direct from Porsche because in most cases the component manufacturer can only sell to Porsche. There are of course exceptions.

With any third party vendor you always run the risk of a non-genuine article.

Respectfully.....what does this mean? Are you suggesting that any vendor selling parts at or below dealer retail is selling a bogus part?
As a relatively small vendor, I can still buy parts from the dealer cheap enough to make a fair profit and still sell genuine parts under retail.

[Henry Schmidt]

Originally Posted by proporsche

Henry..i have plenty of semi damaged rockers, where do you to refurbish..you do it??

thanx

Ivan

We do almost everything in-house.

Rocker process:

We remove the old bushing and adjuster (if present)
Clean adjuster threads with 8x1.0 forming tap.
Ream the bushing hole
Black Oxide the rocker
Press in the new DP-4 bushing and burnish
Surface the contact pad
Blast and coat the contact pad with Moly dry film (TLML 2)
Drill the oiling hole.
Coat with light oil film to prevent rusting during Cryo.
Treat the rocker to a Cryogenic conversion process.

[Henry Schmidt]

Originally Posted by FrenchToast

The parts chain to which you refer is that of the open market, not of Porsche's. Stoddard or Pelican may sell some genuine parts but have no legal obligation to do so.

I wonder if you're aware that Porsche outsources most of their parts?
When I say "supply chain" I am referring to the fact that Porsche is capable of sourcing sub-standard parts just like the rest of us. Because of that fact, they are also capable of selling sub-standard parts. These rockers appear to fall into that category.
Much like the chain sprockets we saw last year and early Dilavar studs we saw for years and the batch of faulty valve springs we saw in the 78-79 911 SC.

[proporsche]

ok cool i get my stuff together and will contact you...
thanx

ivan

[FrenchToast]

Originally Posted by Henry Schmidt

I wonder if you're aware that Porsche outsources most of their parts?
When I say "supply chain" I am referring to the fact that Porsche is capable of sourcing sub-standard parts just like the rest of us. Because of that fact, they are also capable of selling sub-standard parts. These rockers appear to fall into that category.
Much like the chain sprockets we saw last year and early Dilavar studs we saw for years and the batch of faulty valve springs we saw in the 78-79 911 SC.

My mistake then.

I thought the offending parts were fakes, made by a manufacturer not approved by Porsche and they copied all the Porsche logos/numbers in the casting.

I did not realize the bad part is actually the official Porsche part.

I am aware that virtually all parts, with the general exception of some body and engine parts, are outsourced to a manufacturer other than Porsche.

Quality generally does go down after the original run of parts is no longer needed for new cars and/or as they find ways to further value-engineer the component. In some cases it is improved, but, not in this case.

I intended no offense toward you and apologize for the misunderstanding.

[pmax]

Originally Posted by Henry Schmidt

It seems that a new product has reached our shores that purports to be "OE" Porsche rockers.
They are not and in fact are a prime example of the challenges of sourcing high quality parts for air-cooled Porsche projects.
The give away is the bulky nature of the product. It seems that the material is incompatible with Porsche cams hence, rapid wear and eventual cam and rocker failure.


Picture courtesy of DRC.

No triangle.

What’s LG ?

[pmax]

The link to the pelican part also shows LG stamped.

Can anyone at Pelican track this down ?

[gled49]

Correct me if I’m wrong, but early rocker with short foot, had no markings. Rockers marked with the triangle or “B” were long foot later ones like found in SC’s. I’m not sure if large cam bearings had anything to do with long foot, (long contact pad)

[MBAtarga]

Originally Posted by pmax

No triangle.

What’s LG ?

Life's Good?

[G450X]

Any info on the boxes the rockers were in and/or country of origin markings?

I have new camshafts and I had planned on buying new rocker arms, I don’t want to accidentally buy junk, and Schrick or Pauter rockers are overkill on a street engine (not to mention $$$).