Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

Rear Main Seal Leaking After Replacement

Thread Tools
 
Search this Thread
 
Old 05-25-2017, 12:59 PM
  #61  
blueskies
Track Day
 
blueskies's Avatar
 
Join Date: May 2017
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts
Default

Regarding the leaking replacement oil seals, I really don't understand why manufacturers make inferior seals and why vendors sell them, especially after they hear of the problems people have with them. At that point, the manufacturers and vendors should step up and make it right, which means paying parts and labor for doing the work the second time around.

I used to work as a building contractor. One year, the asphalt shingle manufacturer put out a bad batch of shingles. They blistered within a year or so. To my surprise, the manufacturer stepped up and provided new materials and paid for the labor to replace the defective product, without any argument. IMO, that should be the standard, not the exception.

So far I have not had experienced poor quality reproduction parts with the 928, but have lots of experience with poor reproduction parts for Austin Healeys. It is very frustrating when, after paying the money and doing everything right, the new part won't work as designed.
Old 05-25-2017, 06:17 PM
  #62  
Ad0911
Rennlist Member
 
Ad0911's Avatar
 
Join Date: Jan 2003
Location: Netherlands
Posts: 1,954
Received 61 Likes on 28 Posts
Default

I must apologise to both Roger and Greg for sharing the adress where I bought the seals in Europe. I wasn't aware that by doing so I compromised your business. It just felt logical to me that European parts can be bought in Europe to avoid taxes when importing from the states. Be aware that any parts bought in the states must be imported into Europe. This adds approx 25% to the costs.
I cannot ephasize enough how high I value the excellent service provided by Roger and Greg.
Old 05-25-2017, 09:18 PM
  #63  
worf928
Addict
Rennlist Member
 
worf928's Avatar
 
Join Date: Oct 2003
Location: Gone. On the Open Road
Posts: 16,322
Received 1,542 Likes on 1,006 Posts
Default

Originally Posted by GregBBRD
My son walks into my office, hands me a copy of this thread, and asks me, "Why do you bother telling people what you know? How did the time you spent figuring this out and then telling people what seal works best benefit you?"

Truthfully, I just stared at the thread for a few minutes and finally said, "I don't know."

He says, "It's time for you to apply what you know only to your own clients and retire from telling people how to solve their problems on the Internet."
Besides everything else everyone else has written to provide counter-point ...

Let's take a step back and think this through.

What's the downside of sharing hard-won knowledge (yours, Stan's, Sean's, mine) on the Internet?

What's your backlog for non-trivial client projects right now? Last we talked it was more than mine and mine's at about a year.

Are you losing business because folks are 'using' your secrets?

Are you going to lose business because folks now know to use the Elring seals?

Are you going to lose profit by not selling Elring seals?

(I doubt you were planning to sell them in meaningful quantities. What follows is not for you - I 'spect you know it already, so it's for folks that aren't in 'business'...

Your margin on those seals would be way, way less after packing and shipping than it is when you're billing labor hours. The opportunity cost is too much. You'll make more profit by billing labor hours and selling your custom-made parts. So, there's no downside to letting Roger - who's got a 'factory' setup for shipping parts - sell those seals.)

What's the up-side to sharing your knowledge?

More good-condition 928s all-over? Raises average prices? Brings in buyers who not only value recent maintenance but are willing to pay for it?

Folks read rennlist and know who knows what they're doing?

Those folks talk to 928 owners that aren't on rennlist.

Let's keep in mind that there is at least one lurker on the 928 forum who never posts for every forum member that posts even a bit.

How many of your clients are rennlist posters?

How many read rennlist but don't post?

If your clients are like mine it's about an 80% ratio of lurkers to posters.

Bottom line: sharing knowledge builds reputation. It's a marketing expense. Folks talk. They figure things out and those that don't DIY figure out who to bring their 928s to.

Has your backlog grown or shrunk since you became active on rennlist?

The minimal downside to sharing knowledge about 928s is offset by the upside.

I spend 40-50% of my labor hours with the 928 owner 'teaching them.' Imagine what your son might say about that? The sky is falling! The sky is falling!

I'm not losing business. My backlog's not getting shorter. These folks are doing the routine work now. They aren't scared to do a little work on their 928s and they aren't scared about owning and maintaining a 928 until it's RIP time: they know I've got their backs. They are eager to tackle projects and more-often-than not come to me to continue the 'education.'

No downside. I get to work on more challenging (i.e. fun) stuff than fluid changes.
Old 05-25-2017, 09:21 PM
  #64  
worf928
Addict
Rennlist Member
 
worf928's Avatar
 
Join Date: Oct 2003
Location: Gone. On the Open Road
Posts: 16,322
Received 1,542 Likes on 1,006 Posts
Default

Originally Posted by Ad0911
I must apologise to both Roger and Greg for sharing the adress...
There's no need to apologize. You've actually sent more business to Roger since he's going to be able to offer them at a lower price (because he - preseumably - bought in quantity and can amortize the transaction cost with volume.)
Old 06-21-2017, 12:15 PM
  #65  
the flyin' scotsman
Rennlist Member
 
the flyin' scotsman's Avatar
 
Join Date: Oct 2004
Location: Southern Alberta, Canada
Posts: 10,709
Received 52 Likes on 21 Posts
Default

my care package arrived from Tx with the Elring RMS.

Shall pull the clutch and review........other than clean engine oil any other tips on install?
Old 06-21-2017, 09:54 PM
  #66  
Mrmerlin
Team Owner
 
Mrmerlin's Avatar
 
Join Date: May 2004
Location: Philly PA
Posts: 27,870
Received 2,243 Likes on 1,241 Posts
Default

make sure the seal removal cut out is burr free ,
I use STP to lube the crank surface and the seal lip
Old 06-23-2017, 09:39 AM
  #67  
mj1pate
Rennlist Member
 
mj1pate's Avatar
 
Join Date: Apr 2007
Posts: 1,689
Received 95 Likes on 63 Posts
Default

Originally Posted by Mrmerlin
make sure the seal removal cut out is burr free ,
I use STP to lube the crank surface and the seal lip
This is by no means intended to divert an excellent technical solution thread. But I feel the need to mention this. After replacing the seeping rear crank seal on my 2006 Pontiac GTP a few years ago, using the upgraded seal and installation too; the new seal seeped right away. The front seal had begun seeping as well. Utter frustration followed, and I applied a container of ATP205. No affiilition. The seeping completely stopped within days and did not resume. Manufacturers statement is that its a polymer, not a seal softener. It had a consistency like water. User testimony is that once the crankcase is emptied of the product, that the seeping may resume over time. I applied 12 oz to my 86.5 auto trans in response to a pesky fluid pump seal seep and the seepage stopped completely. That was a year ago. I applied 6 oz to my sons decrepit civic engine over 2 oil change intervals. Oil consumption is believed due to old valve seals and I was encouraged of how the magnitude of usage decreased as long as its in the crankcase.
Having used this ubiquitously, I don't have anything negative to report yet. Further, this is likely not the only polymer based product out there, The mechanic I occasionally use has his own similar product that he uses almost to the excision of crank seal replacements.
Old 06-23-2017, 09:40 AM
  #68  
sendarius
Pro
 
sendarius's Avatar
 
Join Date: Mar 2004
Location: Perth, Western Australia
Posts: 715
Likes: 0
Received 13 Likes on 12 Posts
Default

I just discovered this thread, and it makes me glad that I completely forgot about the RMS when I did all the work on my car recently.

As an Aussie, living in the most remote state capital in the world, there is simply no way that Greg will ever be working on my car - to my loss.
As a result, I GREATLY appreciate the fact that Greg is so generous with his knowledge.

Just as I am IMMENSELY grateful that Roger ships parts to this outpost of former empire..
Old 09-15-2018, 03:49 AM
  #69  
Ad0911
Rennlist Member
 
Ad0911's Avatar
 
Join Date: Jan 2003
Location: Netherlands
Posts: 1,954
Received 61 Likes on 28 Posts
Default

I just viewed the Porsche 924 episode of Wheeler Dealer where Ant Anstead applies some lubrication around the crankshaft seal to ease the installation. Afterwards I looked at the WSM and didn't see any mentioning of applying lubrication prior to installation. Did I overlook this or is lubrication not required or even a bad habit? Will this lubrication cause premature leakage or will it help to install the seal properly so thereby decreasing the chance of leakage?

Another interesting repair was a modification of the WUR. But that's for another thread I guess.
Old 09-15-2018, 07:00 PM
  #70  
davek9
Rennlist Member
 
davek9's Avatar
 
Join Date: Jul 2006
Location: Bloomfield, MI
Posts: 5,111
Received 324 Likes on 177 Posts
Default

The Shaft where the seal rides should not be dry when a new seal is installed, also lube the Lip that runs on the shaft
This will keep friction at a minimum until Engine oil reaches it.
Use Assembly Lube or STP as Stan suggested, I prefer assembly lube, even engine oil but not dry.

On the Front and Rear main seals; Always make sure you press the seal into the seat far enough to cover the Removal Notch with the outer rubber of the seal (this depth varies per seal manufacture).

Dave K
Old 09-15-2018, 07:04 PM
  #71  
Ad0911
Rennlist Member
 
Ad0911's Avatar
 
Join Date: Jan 2003
Location: Netherlands
Posts: 1,954
Received 61 Likes on 28 Posts
Default

OK but the question really was if the outer diameter of the crankshaft seal should be lubricated prior to installation. This is what Ant Anstead does on this episode of Wheeler Dealers
Old 09-15-2018, 07:56 PM
  #72  
GregBBRD
Rennlist
Basic Site Sponsor
 
GregBBRD's Avatar
 
Join Date: Feb 2005
Location: Anaheim
Posts: 15,219
Received 2,451 Likes on 1,459 Posts
Default

Originally Posted by Ad0911
OK but the question really was if the outer diameter of the crankshaft seal should be lubricated prior to installation. This is what Ant Anstead does on this episode of Wheeler Dealers
Yes. Nothing special required. A thin coat of engine oil works great.
__________________
greg brown




714 879 9072
GregBBRD@aol.com

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!








Quick Reply: Rear Main Seal Leaking After Replacement



All times are GMT -3. The time now is 01:10 AM.