When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I am building up the cam towers now and use a the gaskets from a complete Victor Reinz engine gasket set. It appeared to me that the 50 x 5 rings around the so called camshaft bearings are fitting rather loose when installing the bearings into the camshaft housings.
I also noticed that there is no gasket between the camshaft beaurings and the camshaft housing. I noticed quite a bit of liquid gasket around the old ones, now I understand and I feel tempted to do the same. I think otherwise oil will seep out.
Another worry is the 23 x 2 O-ring that sits inside the groove in the bushing around the sahft of the camshadt. These O-rings measure uo indeed 23 x 2 mm but the old ones came out 26 mm outside diameter. See picture. There is no way I can get the 23 x 2 mm properly seated in the bushing. I feel very tempted to put in the old rings but this is not what I am used to when installiong Porsche parts. I noticed 1 O-ring in the set that measures up like 25 x 2 mm but that must be for another purpose. The WSM asks for 23 x 2 mm and that is the actual dimension. But there is no way I can get these around the shaft when it is not seated properly in the bushing. Is there a trick to do this?
In the picture on the left is old and new ring 23 x 2 mm
In the picture on the right is the 23 x 2 ring inside the bushing where it is supposed to go according to drawing 103-05.
I am building up the cam towers now and use a the gaskets from a complete Victor Reinz engine gasket set. It appeared to me that the 50 x 5 rings around the so called camshaft bearings are fitting rather loose when installing the bearings into the camshaft housings. If the cam bearing end pieces are original, you should be using the 52 x 4 O-ring in this position, as the 50 x 5 did not occur until sometime later. Generally, the gasket sets contain both o-rings. This can get confusing if you are not familiar with the changes, over the years. (A clue for all O-rings.....just remember that the O-ring needs to extend above the surface of the groove it sits in, to be able to seal against the whatever is on the outside. Oil is generally not sufficient to get O-rings to easily slide. I use Wurth HSS on O-rings.....other people have their favorite "slick" stuff. Regardless of what you use, if there is zero resistance, it's wrong. If you have to "pound" on it to get it to slide together, it's wrong.)
I also noticed that there is no gasket between the camshaft beaurings and the camshaft housing. I noticed quite a bit of liquid gasket around the old ones, now I understand and I feel tempted to do the same. I think otherwise oil will seep out. No sealant required/desired. The O-ring above seals this.
Another worry is the 23 x 2 O-ring that sits inside the groove in the bushing around the sahft of the camshadt. These O-rings measure uo indeed 23 x 2 mm but the old ones came out 26 mm outside diameter. See picture. There is no way I can get the 23 x 2 mm properly seated in the bushing. I feel very tempted to put in the old rings but this is not what I am used to when installiong Porsche parts. I noticed 1 O-ring in the set that measures up like 25 x 2 mm but that must be for another purpose. The WSM asks for 23 x 2 mm and that is the actual dimension. But there is no way I can get these around the shaft when it is not seated properly in the bushing. Is there a trick to do this? 23 x 2 is correct....except that is an internal measurement, not an external measurement.....see below.
In the picture on the left is old and new ring 23 x 2 mm
In the picture on the right is the 23 x 2 ring inside the bushing where it is supposed to go according to drawing 103-05.
Any help is appreciated.
You're confused because Porsche sizes on these O-rings are ID x thickness, not OD x thickness (So a 52 x 4 O-ring measures 60mm on the OD and a 23 x 2 O-ring measures 27mm on the OD.)
The aftermarket gasket sets are economical to purchase, but you need to know enough to pick out the incorrect pieces and substitute in the correct ones....there's many pieces in these sets that I don't use and substitute in the "correct" pieces.
For instance, You'll need a boat load of good luck with the gasket between the head and the cam carrier. There's volumes written about people having to "redo" this particular gasket (which is absolutely no fun with the engine in the car).....you might want to do a bit of reading. (I make a custom gasket, for this application, because the stock gasket rarely works.....send them all over the world.)
You're confused because Porsche sizes on these O-rings are ID x thickness, not OD x thickness (So a 52 x 4 O-ring measures 60mm on the OD and a 23 x 2 O-ring measures 27mm on the OD.)
The aftermarket gasket sets are economical to purchase, but you need to know enough to pick out the incorrect pieces and substitute in the correct ones....there's many pieces in these sets that I don't use and substitute in the "correct" pieces.
For instance, You'll need a boat load of good luck with the gasket between the head and the cam carrier. There's volumes written about people having to "redo" this particular gasket (which is absolutely no fun with the engine in the car).....you might want to do a bit of reading. (I make a custom gasket, for this application, because the stock gasket rarely works.....send them all over the world.)
Thank tou Mr Greg. You helped me a lot in the past and appreciate your answers todat because you confirm what I suspected. The 50 x 5 ring actually measures 51 ID and 59 OD with 4 mm thickness. That was wjhat came out and that is what is new in my set. Upon closer inspection, as you mentioned, the O ring isn't thick enogh to raise above the groove, see picture.
I guess an O ring with 5 mm thickness will be easy to find. We have specialist suppliers for that in the Netherlands. But why isn't the right size in the set? Now I understand the amount of rubberized liquid gasket I found in this area.
Same goes for the small O-rings that go in the bbushings. You mentioned that 23 x 2 is actually the inside diameter. When I buy these things it is mentioned as the outside diameter. So I need 25 x 2 to make it fit.
About the camshaft tower gasket,
I once bought a set from Roger. It could be your gasket. When I look at it, it is actually a bit thinner than the gasket supplied in the set. Is this correct? What makes the original so bad?
The complete set also has the crankshaft oil seals of which there has been much debate. I bought a set separately that is said to overcome the leakae problems (forgot the brand name).
Conclusion,
Quite a few gaskets and rings that came with the complete engine gasket set are actually not the correct size or quality for my car. Did I buy the wrong set?
928 100 901 00 (VR 04-2175-02) Covers all 4.5L 16v engines from 1978 to 1982 both CIS & LJet.
So gaskets and seals are included for variations over that engine range.
I always recommend using the Porsche seal between the oil pick up pipe and the block as the VR one is a little suspect.
Also take into account anything that GB adds.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
I ordered new rings from Porsche. The small 23 x 2 ring that fits in the bushing on the camshaft and the big 50 x 5 rings that seal the camshaft housings. The ones in the VR set were actually not thick enough to seal anything. I measured them up and they were 50 x 4. The ones from Porsche actually were 50 x 5 and softer and more elastic than the same size rings you can buy in the hardware shop for less than a dollar. The standard ones from the hardware shop are to hard so you can't get the bearing inside the housing. The original ones from Porsche fit like a glove and make a perfect seal of the bearing inside the camshaft housing.In the picture you can see that the seal sticks out above the groove just enough to make the seal.
Now I understand why there was so much rubberized liquid sealant in the bearing. A PO must have encountered the same problem.
The small rings also are the same dinmensions as the old ones. So bigger than the rings found in the VR set.
Happy to proceed now.
see the gap. Rings are part # 999 701 602 40
left is the tring that came in the VR set. Rings are part # 999 701 592 40
As I am pulling my engine today to do a reseal job, I was wondering if there any o-rings / gaskets from the VR set (besides what are mentioned here) that should be replaced with Porsche parts.
Engine Gasket Set 77 to 82 4.5L 928 100 901 00
Engine Gasket Set 83-84(80-86 Euro 16v) 4.7L OEM 928 100 901 01
Engine Gasket Set US 85 to 86 Porsche 928 100 901 02
Engine Gasket Set 87 to 95 - Was 03 928 100 901 04
The above part numbers are for the VR engine gasket sets - I stock them all.
On the 16v engines I add the GB Thicker Cam Tower Gaskets and the Porsche oil pick up pipe to block O ring.
On the 32v cars - if you have had the heads shaved you will need the thicker head gaskets to compensate.
That's it as far as I am concerned. Great value for money compared to a Porsche set.
Now I am totally confused. At first, I tried fitting the ring for the bearing carrier on the camshhaft housing that was in the Victor Reinz engine gasket set but found out it was not thick enough to seal between the carrier and the camshaft housing. See my first picture. The bearing carrier has one big groove for the ring. A new original Porsche ring did the job eventually. Now
I have a 1977 camshaft housing with bearing carrier from my spare 1977 engine and it has 2 grooves, less in width and depth than my 1978 part with one groove and the exact same part number. The groove in the 1977 bearing carrier is not wide enough for either the original Porsche ring or the Victor Reinz ring. The bearing carrier will just not allow to be installed into the camshaft housing, even with the old ring in it.
How can 2 parts with the exact same part number be so different?
Engine Gasket Set 77 to 82 4.5L 928 100 901 00
Engine Gasket Set 83-84(80-86 Euro 16v) 4.7L OEM 928 100 901 01
Engine Gasket Set US 85 to 86 Porsche 928 100 901 02
Engine Gasket Set 87 to 95 - Was 03 928 100 901 04
The above part numbers are for the VR engine gasket sets - I stock them all.
On the 16v engines I add the GB Thicker Cam Tower Gaskets and the Porsche oil pick up pipe to block O ring.
On the 32v cars - if you have had the heads shaved you will need the thicker head gaskets to compensate.
That's it as far as I am concerned. Great value for money compared to a Porsche set.
So I've purchased the kit:
P/N: 92810090100 VictorReinz OEM
Cross References: 012417502, W01331647233
I have a base 928 Euro, 1982. I have not opened the package, and I have not turned a wrench on the engine yet.(in regards to the gasket refresh).
Is there anywhere that cross reference the gaskets in the kit as to what goes where so I can plan and organize before I pull the engine?
And what gaskets should I just go ahead and toss and order custom/OEM? Who should I give that business to?
10-05-2019, 02:16 PM
Questions about Victor Reinz engine gasket set
George Layton March 2014
