New improved blue case through bolts o-rings? No need for the green vitons?

[Tippy]

I spoke with a local Porsche shop that is pretty reputable and they told me that they no longer use the green viton o-rings.

They told me the new blue ones are tougher and have a 550 degree operating range versus the previous 350 degree range.

I said my kit came with blue ones from Victor-Reinz and he said, "yes, they made the change a couple of years ago to the new improved blue ones".

He also said they have had no problems with the new blue ones......

Anyone know about this?

I'm still hesitant due to this board.

Please set my mind at ease on which direction to go.

[lindy 911]

I used the blue ones and they leaked like a stuck pig! They came in the gasket set I sourced from our host last year. I had to replace them all with green Vinton o-rings and grease. NO SILICONE. The blue rings pushed out from under the washers when tightened.

Lindy

[Tippy]

Dangit!

[john walker's workshop]

the green ones work, so try the blue ones if you want to take a chance. lots of fun doing another teardown. keeps your chops up.

[brads911sc]

They are 50 cents each. Not sure why you would even think about cutting a corner there. Buy the $12 worth of green ones... its nothing in the 12k price of a rebuild. You probably spent more than that on the brake cleaner you used to clean it. EBS or Henry have them in stock and you will have them within a few days.

Originally Posted by Tippy

I spoke with a local Porsche shop that is pretty reputable and they told me that they no longer use the green viton o-rings.

They told me the new blue ones are tougher and have a 550 degree operating range versus the previous 350 degree range.

I said my kit came with blue ones from Victor-Reinz and he said, "yes, they made the change a couple of years ago to the new improved blue ones".

He also said they have had no problems with the new blue ones......

Anyone know about this?

I'm still hesitant due to this board.

Please set my mind at ease on which direction to go.

[cstreit]

Never had a problem with the blue ones, but I lube them up pretty good when tightening the thru bolts so they don't tear as much.

[Tippy]

Originally Posted by john walker's workshop

the green ones work, so try the blue ones if you want to take a chance. lots of fun doing another teardown. keeps your chops up.

Nope, only want to do it once...fingers crossed

Originally Posted by brads911sc

They are 50 cents each. Not sure why you would even think about cutting a corner there. Buy the $12 worth of green ones... its nothing in the 12k price of a rebuild. You probably spent more than that on the brake cleaner you used to clean it. EBS or Henry have them in stock and you will have them within a few days.

I am not trying to cut corners.

1. I asked a question that if in fact the blue ones are as good as the green ones now.
2. Why would you order a common o-ring that you can buy at a local auto parts?

Originally Posted by cstreit

Never had a problem with the blue ones, but I lube them up pretty good when tightening the thru bolts so they don't tear as much.

"Tear as much".....nuff said...

[4sd911]

If you use the green ones just make sure the washers seat againist the case, I had a issue of them holding the washers off the case. Look at the face of the case where the washers seat to see if it is still flat, the washers can dig into the case a bit. Also see if there is a chamfer on the case.

[lindy 911]

Tippy,

If you are absolutely sure the the locally sourced rings are the same, go for it. But you need to make sure; something tells me they are not. With regard to the case having a chamfer, mine did not and the 3.0 litre cases I've seen do not. I don't know that a chamfer cut is necessary as mine is stock and came from the factory without a chamfer and did not leak. I'm not saying it's a bad idea just that it worked before the way it is without the case chamfer.

I must take exception to Waynes recommendation of using silicone with the o-rings. That in itself might be why the blue ones have a hard time staying in place during installation and squeeze out. The green ones may do the same if you try to use RTV or the like. I used silicone grease and the green ones the second time around and would only do it that way in the future. I'm a "If it works don't fix it" kind of guy.

Lindy

[Henry Schmidt]

We have been seeing absolutely atrocious quality in the Victor Rienz gaskets.
The most recent ( just this week) were 2.7 CE rings that are so cheap I wouldn't use them for a ring toss and out of round base gaskets. So badly out of round that they wouldn't fit on the cylinders.
Wrightwood Racing gaskets are the only way to go.

[88-diamondblue]

Agree with Henry. I used the Wrightwood racing set on mine and green viton o-rings. No leaks and quality was good

[Tippy]

Originally Posted by 4sd911

If you use the green ones just make sure the washers seat againist the case, I had a issue of them holding the washers off the case. Look at the face of the case where the washers seat to see if it is still flat, the washers can dig into the case a bit. Also see if there is a chamfer on the case.

Will keep an eye out, thanks.

Originally Posted by lindy 911

Tippy,

If you are absolutely sure the the locally sourced rings are the same, go for it. But you need to make sure; something tells me they are not.

Yes, I will make sure, not going to jeopardize it. Viton is used in AC stuff BTW.

Originally Posted by Henry Schmidt

We have been seeing absolutely atrocious quality in the Victor Rienz gaskets.

Argh....I've spent 100's of hours (over 27 months down) on this board researching and I have never heard of their quality being bad. I would have paid more if I'd have known...

Originally Posted by 88-diamondblue

Agree with Henry. I used the Wrightwood racing set on mine and green viton o-rings. No leaks and quality was good

Yeah, like I said above, I knew about the blue o-rings but not that Victor-Reinz quality is bad....

[Ian Fulton]

Cory, for my rebuild I had read about this issues somewhere else on the forum.
That clinched the deal as far as I was concerned to go with the general consensus of using the green ones.
That is what I have now ordered for my rebuild

Ian (from one of those days)

[Tippy]

Originally Posted by Ian Fulton

Cory, for my rebuild I had read about this issues somewhere else on the forum.
That clinched the deal as far as I was concerned to go with the general consensus of using the green ones.
That is what I have now ordered for my rebuild

Ian (from one of those days)

Yeah, I have to get them this weekend.

I will report back if I in fact do find them in a parts house.

BTW, GL with your build!

[ALEX P]

When I tore mine down it had the blue ones in there, I ordered a new set and they arrived black but for what they cost I just wasn't prepared to take the risk so got a set of green ones.

Good luck.

[Ken911]

where do you get wrightwood gaskets?

[john walker's workshop]

viton can be black too.

[sjf911]

Originally Posted by ken911

where do you get wrightwood gaskets?

1+

[Henry Schmidt]

Originally Posted by Ken911

where do you get wrightwood gaskets?

Supertec

[ChrisBennet]

Here's what the blue o-rings do (scroll down to my post) for pictures:

http://forums.pelicanparts.com/911-engine-rebuilding-forum/291553-through-
bolts-seals.html