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US 1984. In the process of a TER and replacing the gaskets on the water bridge. I did a search and I could not find a definitive answer on whether or not you should use paper gaskets in combination with the orange silicone ones that go into the flanges of the arms which mate to the heads. I did find one thread where the guy had removed the bridge on his GTS and it had both paper and the silicone gasket. He claims it was the first time the bridge had been off and therefore was how it left the factory.
When I took mine off there was no paper gasket just the orange silicone gaskets. But that doesn't mean its correct. So I have both the silicone and paper gasket and am inclined to leave the paper gasket off. However, to add to the confusion, as you can see, that paper gasket (P/N 928-106-197-03) has a silicone bead on both sides. So maybe doubling up is the way to go?
Hi Nate, I thought those orange gaskets were nla. I used rubber o rings instead combined with those silicon gaskets in my 1985 S2 and no problems one year later. However, I would like to get hold of those orange silicons for future use. Where did you get yours please ?
Originally Posted by GT6ixer
US 1984. In the process of a TER and replacing the gaskets on the water bridge. I did a search and I could not find a definitive answer on whether or not you should use paper gaskets in combination with the orange silicone ones that go into the flanges of the arms which mate to the heads. I did find one thread where the guy had removed the bridge on his GTS and it had both paper and the silicone gasket. He claims it was the first time the bridge had been off and therefore was how it left the factory.
When I took mine off there was no paper gasket just the orange silicone gaskets. But that doesn't mean its correct. So I have both the silicone and paper gasket and am inclined to leave the paper gasket off. However, to add to the confusion, as you can see, that paper gasket (P/N 928-106-197-03) has a silicone bead on both sides. So maybe doubling up is the way to go?
Interesting that the silicone gaskets fitted your USA 84. Technically they were only used on the 84 to 86 ROW S2 cars. Maybe someone swapped out the water bridge on your car at some time.
928 106 197 03 - yes we had them made for the ROW S2 cars as they are NLA.
"Others" sell them as fitting all 16v engines.
On later cars 87+ Porsche recommended using a thicker paper gasket along with a red silicone original gasket.
Should not be needed on the earlier S2 cars but would not do any harm.
__________________
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."
Interesting observation Roger. The part number on my bridge is 928.106.161.6R and doesn't exist in the USA/Canada version of my PET. Is this the ROW P/N?
I got the gaskets from 928 Intl. So as you see below my pet showed what looks to be the paper gasket as #32. This is listed as P/N 928 106 197 03. On 928 Intl's website they show both a -03 and a -04 gasket. Same picture. Since they are inexpensive I decided to get both cause I wasn't sure of the difference. Also my PET lists the 04 gasket but as an unillustrated part. So when they arrived I got one paper gasket and one bag with the two orange gaskets. So I'm not sure what went on there but I guess it's dumb luck because my bridge needs these orange gaskets.
Hi Roger, Do these orange silicon gaskets fit regulator housing 928 106 016 14 (my car)?
My version of the pet shows the p/n you quoted 928 106 197 03 as being up to '84 only.
Originally Posted by ROG100
Interesting that the silicone gaskets fitted your USA 84. Technically they were only used on the 84 to 86 ROW S2 cars. Maybe someone swapped out the water bridge on your car at some time.
928 106 197 03 - yes we had them made for the ROW S2 cars as they are NLA.
"Others" sell them as fitting all 16v engines.
On later cars 87+ Porsche recommended using a thicker paper gasket along with a red silicone original gasket.
Should not be needed on the earlier S2 cars but would not do any harm.
Hi John,
The paper gasket with the silicone bead was part number 928 106 197 00 which superseded to 928 106 197 01 which in turn SS to 928 106 197 04. Used an 16v cars 77 to 83 ROW & 16v 77 to 84 USA/CAN.
The silicone gasket is part number 928 106 197 03 and technically used on 84 to 86 16v ROW S2 cars. Part is still NLA with Porsche. My part number is 928 106 197 03S and price is $5 each.
So yes the correct part number for M28.21/22 engines with water bridge 928 106 016 14 is 928 106 197 03S.
Nate,
The manufacturer'specification stamp on your water bridge 928 106 161 6R is the same as on my 1985 euro s2. The Porsche part number for this is 928 106 016 14. I know this because I had to buy a new one from Porsche and they didn't have the orange gaskets to fit (nla). At first I used the later type supposed replacement gaskets but they leaked. I solved the problem by using rubber o rings together with later gaskets but I would like to get the orange ones for future use. Checking with Roger that his will fit my bridge.
Originally Posted by GT6ixer
Interesting observation Roger. The part number on my bridge is 928.106.161.6R and doesn't exist in the USA/Canada version of my PET. Is this the ROW P/N?
I got the gaskets from 928 Intl. So as you see below my pet showed what looks to be the paper gasket as #32. This is listed as P/N 928 106 197 03. On 928 Intl's website they show both a -03 and a -04 gasket. Same picture. Since they are inexpensive I decided to get both cause I wasn't sure of the difference. Also my PET lists the 04 gasket but as an unillustrated part. So when they arrived I got one paper gasket and one bag with the two orange gaskets. So I'm not sure what went on there but I guess it's dumb luck because my bridge needs these orange gaskets.
Hi Roger,
Thanks for that.I will have 2 of your Orange ones please 928 106 197 03S and can you send me a paypal invoice please ?
Originally Posted by ROG100
Hi John,
The paper gasket with the silicone bead was part number 928 106 197 00 which superseded to 928 106 197 01 which in turn SS to 928 106 197 04. Used an 16v cars 77 to 83 ROW & 16v 77 to 84 USA/CAN.
The silicone gasket is part number 928 106 197 03 and technically used on 84 to 86 16v ROW S2 cars. Part is still NLA with Porsche. My part number is 928 106 197 03S and price is $5 each.
So yes the correct part number for M28.21/22 engines with water bridge 928 106 016 14 is 928 106 197 03S.
Interesting that the silicone gaskets fitted your USA 84. Technically they were only used on the 84 to 86 ROW S2 cars. Maybe someone swapped out the water bridge on your car at some time.
Originally Posted by murray928
Nate,
The manufacturer'specification stamp on your water bridge 928 106 161 6R is the same as on my 1985 euro s2.
At one point someone also swapped the speedometer out with one that reads in km/hr. My guess is that they had access to a ROW parts car. Otherwise why not just use US replacements?
I've got the exact same model and a few weeks ago I purchased the same gaskets and placed them back into the car.
I started the car and everything ran fine (idle) during a few minutes, but as the engine came up to temperature I got all of a sudden a big geyser of coolant spreading exactly from where the gasket was (passenger side, in case that makes any difference).
Of course i stopped the car immediately. At first, I thought the problem was with the gasket (either a defect on it, or more likely a defect on myself when installing it ). But it turns out that the gasket itself is actually fine, and the problem is with the bridge itself. On the photo below, you can see that a small piece of metal broke and is missing, just where the gasket is placed.
You can see a small piece of metal is missing.
I'm looking separately for a replacement for the water bridge, hopefully i can find one in Europe where i live.
But my question here is about that small piece of metal which is now missing in action : most likely, when it broke out, it fell into the small hole that you see on the photo below. I guess I need to get it out of here before trying to restart anything... Based on the configuration of the engine and on the likely size of that piece of metal, can anyone guess where it must be now within the engine, and what do I need to open to find it?
As a side note, although it's not that important now, I'd be curious if anyone has had this kind of problem before. Presumably there is not that much pressure or mechanical constraint where this gasket is placed so how can a piece of metal like this break all of a sudden??
Yves, It would be a good idea to test fit your WB to see how its fits the heads.without any O ring or gaskets,
Use a feeler gauge to see the clearance of the flanges,
if its close then minimum finishing should be required so you could use one gasket per side to repair.
That said you can fix your part ,
You will fill in the groove completely on both sides of the WB.
clean the sealing groove well,
use some blue tape to mask off the area, and form a dam area where the broken piece of metal was
mix some JB weld and fill the slot till its flush with the surface, let it cure .
Finish the surface so its flat,
get new flat gaskets, 2 per side and install with some silicone sealant
Hi and thank you for the advice, I'm trying to find a replacement part at an affordable price, but if i can't find anything I will definitely consider this option.
The clearance between the WB and the heads look fine but I just did a visual inspection, I will double-check with a proper gauge.
Any thoughts about tracking down the small broken piece of metal ?
08-13-2016, 03:34 AM
Water Bridge Gasket
George Layton March 2014
). But it turns out that the gasket itself is actually fine, and the problem is with the bridge itself. On the photo below, you can see that a small piece of metal broke and is missing, just where the gasket is placed.
