dutchcrunch

Don’t use the Porsche rear main seal, stupid new design, get the Erling, it’s the same as the original.

dutchcrunch

It was smart choice to replace the tensionerstensioner

blueboxster393

Thank You all for your inputs

revolution993

I am ordering pretty much all those parts in that list looks expensive lol
My builder been building race porsche motors for years and he tells me the glyco twr etc.. is all porsche stuff without the fancy box..

peterpullin

your builder is right for the past. in the presence you can google for rod bearing or oilpump seal. results speak for themselves.
trw is complete different, they make their own products. seem to be good.

cobalt

Well if you don't listen to your engine builder you will always have to worry if something goes wrong will he blame the parts? It certainly makes his life easier if everything says Porsche on it. Was this list compiled from parts needed after a tear down or just a blanket list?

Was this engine ever addressed for the open TSB requiring different cylinders and heads? If not what is his plan to address it or I would have to question his capabilities or working knowledge of these engines if he just plans to slap it back together with just new parts. Some of the parts can be tested and if within spec can be reused. Any good mechanic will inspect the components prior to installing Porsche OE or not. Many of the seals are standard items and can be purchased for far less for the identical product. Why do you need rennline valve covers? The old mag covers can be easily reworked assuming they haven't degraded past the point of reuse. Factory aluminum covers are fine. Why isn't he ordering the parts? If he has a legitimate business he has access to wholesale pricing from, Porsche, worldpac, northside or other sources which will sell him the proper parts for far less. Can't tell you how many factory parts I compared to parts supplied by other sources and the factory part which cost considerably more were nothing but the same sealed tube of sealant with a Porsche sticker slapped on it. Fact is Viton seals are viton seals whether they come from Porsche or not and you won't see any variations if purchased from a reputable supplier. Pricing will vary by as much as 110% or more at times. Also TRW which has been sold now to ZF has issues with some of their parts. You need to check the country of origin some are not as good as others.

Catorce

This fact was lightly addressed at the beginning of this thread, but I'd like to elaborate on the fact that Porsche makes exactly NONE of their own parts. Not the case, not the gaskets, NOTHING.

How do I know this? My neighbor is an OEM supplier to Porsche and other manufacturers. He makes gears and diffs for a living as well as a multitude of other parts. Porsche sets the standards, then farms production out to OEM suppliers. They buy the parts from the OEM at .25 to .33 cents on the retail dollar.

My neighbor makes parts with BMW, VW, and Porsche stamped on them.

I am not saying they are bad parts - they aren't at all. They are excellent parts, but you need to realize that all it is is a set of standards that Porsche sets.

Oh, and my neighbor's company also sells the exact same parts without the branding.

They are the same part, so don't get wrapped around the axle on OEM.

jeff33702

Seems like we could use a solid cross-reference guide for who makes what.

revolution993

I heard some glyco rod bearings are made in south africa and didn’t fit well..

Navaros911

Even that isn't static. During production things changed and from leaving the factory till now a lot of changes have happened. Even original Porsche parts are not necessarily the same as 30 odd years ago.

I put my trust in parts suppliers to some extent. They often know what is going on in this arena better than us, buyers. I never go with generic parts suppliers for the reason that they don't see enough of a certain part go over the counter... specialist suppliers on the other hand do have a higher probability of giving sound advice.

cobalt

I don't think anyone thinks Porsche makes the parts just the cars. Although there are OE parts that differ from OEM parts. I have put OE parts side by side with their OEM counterpart and in some cases coatings and or tolerances were not as precise as the OE parts with Porsche part number. At times the OEM part contractually has to be different or in some cases are seconds they can't sell to the end user. Many times the OEM parts have the OE markings ground off. I agree with Navaros911's comments. I purchased a 993TT brake master cylinder from Porsche. Thankfully it was cheaper than the OEM source but when I received it after waiting 4 weeks for it to come from Germany it was the same TRW part I could have sourced elsewhere without the metal plate and Porsche part number the older ZF versions had. The quality was IMO inferior to what came on the 993TT's originally. Same thing happened back in 2005 when Porsche released the Speedline for Porsche wheels used on the 94 turbos. Compared to what came on my car the newer release wheels had all sorts of issues like having a lower case i in SPEEDLiNE, the bolts having a blueish cast and the clear coat not as smooth and these were sourced from Speedline using the original tooling sent in Porsche boxes. Porsche eventually figured it out and made the necessary corrections but now charge $10k vs $4100.

jeff33702

Yes but it seems like this price increase is in response/proportion to the increase in the values of the cars as a whole.

cobalt

I don't disagree. They are cashing in and why not. It has also been nearly 15 years and prices in general increase due to inflation and economy.

bb964

During the Porsche Zuffenhausen factory tour last year I asked the question and the tour guide (factory employee) confirmed that Porsche does NOT make any parts. The parts come from suppliers in and the factory assembles the cars.

cobalt

^^^ They might not manufacture them however they do have quality centers that inspect parts for just in time delivery. Parts still get rejected by Porsche. If you do some searching of these forums you will find this is nothing new. We have been discussing this since the 993 arrived. It isn't economical to make parts in house and it hasn't been so for many decades. That still doesn't mean there aren't quality differences and some parts IMO should have Porsche's stamp of approval on them. You also have a warranty with Porsche parts you don't get from the OEM suppliers. Although there are aftermarket parts that are superior to what Porsche offers if you know what you're looking at. There are also a lot of companies making claims to make superior products without proof.

The aerospace industry switched over to this approach nearly 30 years ago and they make things in far smaller quantities.