Balance Shaft Seals: 968 Seals in a 944?
04-30-2018, 11:40 PM
#1
Burning Brakes
Thread Starter
Balance Shaft Seals: 968 Seals in a 944?
I'm resealing the front end of my '86 and have some questions about the balance shaft seals. First, I see there are newer seals specified for the 968 which Paragon says fit the 944 but I can find nearly no online reference to using these seals in a 944 so do they work ok in an 86 951? Is it a better seal than the 944 version? What's the difference between them? I did see one comment that the 968 seals have two lips while the 944 seals have one but the post was not really that certain so not sure if that's actually true or not.
Also, I see there are a ton of people who have oil leaks immediately upon replacing their seals so what are the things to look out for in hopes that I don't have any problems? It seems many who have issues are using Reinz seals but again, not sure if that's a certainty or not.
Any help appreciated....
Also, I see there are a ton of people who have oil leaks immediately upon replacing their seals so what are the things to look out for in hopes that I don't have any problems? It seems many who have issues are using Reinz seals but again, not sure if that's a certainty or not.
Any help appreciated....
05-01-2018, 01:24 AM
#2
Rainman
Rennlist Member
Rennlist Member
front BS seals are identical 944 or 968.
the rear seal was changed around 1987 MY. so a 1987+ 944 would use the same seal as 968, up to 86 uses a different seal.
you'd have to do the job really wrong to get oil leaks immediately after replacing the seals. also, Reinz is the only option, no one else makes seals for 944. any other "brand" you buy will be repackaged Reinz (owned by Dana aka Mahle aka Victor Reinz aka... )
the rear seal was changed around 1987 MY. so a 1987+ 944 would use the same seal as 968, up to 86 uses a different seal.
you'd have to do the job really wrong to get oil leaks immediately after replacing the seals. also, Reinz is the only option, no one else makes seals for 944. any other "brand" you buy will be repackaged Reinz (owned by Dana aka Mahle aka Victor Reinz aka... )
05-01-2018, 03:20 AM
#3
Burning Brakes
Thread Starter
front BS seals are identical 944 or 968.
the rear seal was changed around 1987 MY. so a 1987+ 944 would use the same seal as 968, up to 86 uses a different seal.
you'd have to do the job really wrong to get oil leaks immediately after replacing the seals. also, Reinz is the only option, no one else makes seals for 944. any other "brand" you buy will be repackaged Reinz (owned by Dana aka Mahle aka Victor Reinz aka... )
the rear seal was changed around 1987 MY. so a 1987+ 944 would use the same seal as 968, up to 86 uses a different seal.
you'd have to do the job really wrong to get oil leaks immediately after replacing the seals. also, Reinz is the only option, no one else makes seals for 944. any other "brand" you buy will be repackaged Reinz (owned by Dana aka Mahle aka Victor Reinz aka... )
And there is also Kaco who make the OEM Porsche seals which Pelican sells. Furthermore, my old seals which I just pulled out of my car are Kaco. These may actually be the original seals as I've never replaced them.
05-01-2018, 10:27 AM
#5
Three Wheelin'
I'd recommend genuine Porsche seals because I've had trouble with the aftermarket seals from the usual places. Mine leaked almost immediately after I first changed them (upper balance shaft). When I was replacing them, I also found that the crank seal was way too loose. I couldn't tell if it was actually leaking because of all the oil from the upper balance shaft seal, but it probably was. See my thread here. (and the related thread it links to). So far I've had zero issues after going with the Porsche crank seal so I'll go this route in future. In fact I think I'll do this for any seal that's not trivially easy to get to.
05-02-2018, 12:17 AM
#6
Race Car
Victor Reinz is industry standard and used in every shop that I am familiar with, including myself.
As long as the metric dimensions (ie 30mmid/48mmod) are the same, they will interchange.
The outer lip on the seal Humbold posted has no oil sealing function.
Only the lip with the garter spring on either seal serves as sealing.
T
As long as the metric dimensions (ie 30mmid/48mmod) are the same, they will interchange.
The outer lip on the seal Humbold posted has no oil sealing function.
Only the lip with the garter spring on either seal serves as sealing.
T
05-02-2018, 05:11 AM
#7
Drifting
You know personally I've never seen a "968" seal. Just seen this thread and looked on eBay, took photos and posted. I've only used the correct "944" seals at their proper upper or lower locations with new sleeves and never had any problems. Also I've never seen different front seals other than the two I have always used like Spencer has pointed out. If you don't want it to leak use a new sleeve and make sure the translucent gasket is in place behind it and make sure you place the proper front seal in its location. They have arrows on the front of the seal indicating which direction it will work when the balance shaft is spinning. There is only one direction either of the balance shafts spin so pay attention to the arrows on the front seals and you'll be good to go. Just use all new sleeves with a reseal job and it should have no issues. And rubber will grove metal, so don't listen to anyone behind a parts counter that may argue against that. I have had a real winner try to tell me there is no way rubber will grove metal, yep there is a reason he was behind a parts counter.
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05-02-2018, 07:26 AM
#8
Race Car
Its probably the grit at the seal lip that really causes the groove wear.
Also probably why the later seal has the additional dust lip.
Inside automatics, sizeable teflon rings that you can cut with your fingernail and pressure will machine an 1/8" groove in a steel stator sleeve though.
I doubt the 944 seals are virgin rubber, most likely viton.
T
Also probably why the later seal has the additional dust lip.
Inside automatics, sizeable teflon rings that you can cut with your fingernail and pressure will machine an 1/8" groove in a steel stator sleeve though.
I doubt the 944 seals are virgin rubber, most likely viton.
T