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i pulled the water bridge to replace the dry rotted big o ring and the oil filler neck gasket. Question: the euro s2 has the orange Nla silicone gaskets. They were not leaking. I received two paper gaskets from roger as show below. What is the best practice? Use original silicone o ring and gasket with rtv? Or should I just use the original o ring since they weren't leaking and add some dc111 to them? Or I read roger has a replacement orange o ring?
Have you removed the thermostat to replace the rear T stat seal?. its also wise to swap in a new T stat and O ring.
First get new bolts for the bridge and the T stat housing use anti seize on them or PTFE non setting pipe sealant Loctite 720
From your picture I would suggest to put some dreibond 1209 on both sides of the paper gasket and a smear onto the orange O ring in the bridge,
and put it together.
Use DC111 on the center O rings and the rear T stat seal face.
I have the silicone gaskets but keep forgetting you are working on an S2.
I will ship you two tomorrow gratis.
__________________
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."
Have you removed the thermostat to replace the rear T stat seal?. its also wise to swap in a new T stat and O ring.
First get new bolts for the bridge and the T stat housing use anti seize on them or PTFE non setting pipe sealant Loctite 720
From your picture I would suggest to put some dreibond 1209 on both sides of the paper gasket and a smear onto the orange O ring in the bridge,
and put it together.
Use DC111 on the center O rings and the rear T stat seal face.
Have you removed the thermostat to replace the rear T stat seal? YES.Check.
Iits also wise to swap in a new T stat and O ring. Yes. Check.
First get new bolts for the bridge and the T stat housing use anti seize on them or PTFE non setting pipe sealant Loctite 720. Check.
From your picture I would suggest to put some dreibond 1209 on both sides of the paper gasket and a smear onto the orange O ring in the bridge,
and put it together. Looks like Roger is sending me the correct ones. CHECK.
Use DC111 on the center O rings and the rear T stat seal face. Yes. CHECK.
Thanks Stan!
After getting into the inner thermostat seal, the rubber fell off leaving the metal band. Tips or tricks from removing metal band that is remaining from old seal?
take a long thin screwdriver and press it between the metal ring and the bore of the seal,
once the metal is pushed into the center of the hole the ring will come free
i pulled the water bridge to replace the dry rotted big o ring and the oil filler neck gasket. Question: the euro s2 has the orange Nla silicone gaskets. They were not leaking. I received two paper gaskets from roger as show below. What is the best practice? Use original silicone o ring and gasket with rtv? Or should I just use the original o ring since they weren't leaking and add some dc111 to them? Or I read roger has a replacement orange o ring?
Thanks!
New O-rings and a thin layer of Dreibond 1209.
Use new hardware and the proper never seize in the threads on the head, so it will come apart, next time.
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
Forgot to add if the heads have been cut then you should remove the center fat O ring and dry fit the water bridge to the engine, put the bolts in finger snug
then use a feeler gauge to see how much the feet are off from a flush mating,
if they are off more than .010 in. then you should use the paper gaskets as well as the orange O ring seal.
Also consider surfacing the feet to change the angle of the water bridge if the clearance is excessive.
NOTE this would be a last resort as fitting thicker head gaskets is a whole lotta extra work VS reangling the feet
A SA was issued to use these paper gaskets as well as the O rings due to mismatching of the feet to the heads this was creating leaks
New bolts on way. Got the inner metal ring off. Used a small flat blade to atleast lift up and push a bit toward the middle and then used a small vice grip to pull out. I will verify the thickness at the heads later tonight. I presuming that if the original o rings caused no leakages, the new ones should be good. here are some pics:
Since you posted a picture thats not looking correct.
in the picture the T stat is backwards, the smaller flat piece seals the inner rear seal so it should be turned 180 degrees from the picture
also the O ring that seals it. appears to have been placed into the bore first.
put the T stat in,
then the O ring ,
then inlet .
use antiseize on the bolts and DC 111 on the O rings
Since you posted a picture thats not looking correct.
in the picture the T stat is backwards, the smaller flat piece seals the inner rear seal so it should be turned 180 degrees from the picture
also the O ring that seals it. appears to have been placed into the bore first.
put the T stat in,
then the O ring ,
then inlet .
use antiseize on the bolts and DC 111 on the O rings
thanks stan for catching that...must of been getting late in the day!!
03-23-2019, 11:07 PM
84 euro & waterbridge head gasket help
George Layton March 2014
