Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 04-28-2020, 03:36 AM   #1
Registered User
 
Join Date: Oct 2018
Location: New England
Posts: 47
RMS, IMS, or other leak?

In the midst of a clutch replacement and am doing the IMS, RMS, etc. It's a 99 Box with about 42K miles. I purchased it about 18 mos ago with 39K miles on it. Has been running great so far.

I pulled the trans and flywheel. The engine has a lot of grime on the engine/trans underside and inside the trans bell housing. I expected to see obvious leaking from the RMS or IMS seal. See photos of the bell housing, and of the IMS/RMS. Where do you think the leak is originating from that's causing all the grimy buildup?





geekdaddy is offline   Reply With Quote
Old 04-28-2020, 04:06 AM   #2
Motorist & Coffee Drinker
 
78F350's Avatar
 
Join Date: Jul 2014
Location: Oklahoma
Posts: 2,535
Garage
I bet that it's the IMS flange seal. That's how one of my '99s looked and the RMS was still good at about 127k miles. My leak was bad enough that it would leave an oil spot under the car and the bearing itself still looked good when we replaced it with a LN dual row. Still, get a good look at the input shaft on the transmission before it all goes back together.
__________________
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.

Last edited by 78F350; 04-28-2020 at 04:08 AM.
78F350 is offline   Reply With Quote
Old 04-28-2020, 08:27 AM   #3
Registered User
 
Join Date: Oct 2018
Location: New England
Posts: 47
Additional pic with throw out bearing and fork removed. Still not sure but perhaps a mainshaft seal leak?

Also looks like my pilot bearing is stuck on the shaft in stead of the flywheel.

geekdaddy is offline   Reply With Quote
Old 04-28-2020, 09:54 AM   #4
Motorist & Coffee Drinker
 
78F350's Avatar
 
Join Date: Jul 2014
Location: Oklahoma
Posts: 2,535
Garage
The transmission is very similar to the 01E transmission used in Audis and a few VWs. If you can't find much Boxster specific stuff there's more on the 01E if you are looking at seals or bearings in general.
stuff like this https://forums.quattroworld.com/s4s6/threads/28360.phtml
__________________
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
78F350 is offline   Reply With Quote
Old 04-28-2020, 11:36 AM   #5
Registered User
 
Join Date: Oct 2018
Location: New England
Posts: 47
THANK YOU -- that was helpful! I'll inspect and likely replace the input shaft seal.
I was wrong about the pilot bearing -- it's still in the flywheel.
I popped it out and it looks to be in good condition although I will put a fresh one on.

Quote:
Originally Posted by 78F350 View Post
The transmission is very similar to the 01E transmission used in Audis and a few VWs. If you can't find much Boxster specific stuff there's more on the 01E if you are looking at seals or bearings in general.
stuff like this https://forums.quattroworld.com/s4s6/threads/28360.phtml
geekdaddy is offline   Reply With Quote
Old 04-28-2020, 01:58 PM   #6
Registered User
 
Join Date: Sep 2018
Location: Laval QC
Posts: 144
The RMS and IMS seals look great compared to mine. I'd say that oil seepage is from the transmission side as you suggested.
__________________
Grant
Green 2000 Boxster 5-speed
1978 928 auto
1987 924S 5-speed (Sold)
Blue 2000 Boxster 5-speed (Sold)
elgyqc is offline   Reply With Quote
Old 04-28-2020, 06:48 PM   #7
Registered User
 
Rickvd's Avatar
 
Join Date: Mar 2018
Location: Indiana
Posts: 101
Garage
just curious did you observe the cam shaft deviations before you started, and what did the visual inspection of the removed ims show? Mine is an 04 S, tiptronic with just over 40k miles. Rick
Rickvd is offline   Reply With Quote
Old 04-29-2020, 03:38 AM   #8
Registered User
 
Join Date: Oct 2018
Location: New England
Posts: 47
Not yet -- haven't locked down the crank/cams. Waiting for the tool.

Quote:
Originally Posted by Rickvd View Post
just curious did you observe the cam shaft deviations before you started, and what did the visual inspection of the removed ims show? Mine is an 04 S, tiptronic with just over 40k miles. Rick
geekdaddy is offline   Reply With Quote
Old 05-02-2020, 02:14 PM   #9
Registered User
 
Join Date: Oct 2018
Location: New England
Posts: 47
Whoops I didn't read your question correctly. I don't have a durametric so not checking them.
Quote:
Originally Posted by Rickvd View Post
just curious did you observe the cam shaft deviations before you started, and what did the visual inspection of the removed ims show? Mine is an 04 S, tiptronic with just over 40k miles. Rick
geekdaddy is offline   Reply With Quote
Old 05-02-2020, 07:07 PM   #10
Registered User
 
Rickvd's Avatar
 
Join Date: Mar 2018
Location: Indiana
Posts: 101
Garage
No problem. Mine has the original ims and I am monitoring the cam deviations as an indicator of ims health so just curious. Still interested in you evaluation of the old ims when you get it out. Have a great weekend.
Rickvd is offline   Reply With Quote
Old 05-02-2020, 11:13 PM   #11
Registered User
 
Join Date: Jul 2019
Location: Finland
Posts: 75
Quote:
Originally Posted by Rickvd View Post
No problem. Mine has the original ims and I am monitoring the cam deviations as an indicator of ims health so just curious. Still interested in you evaluation of the old ims when you get it out. Have a great weekend.
What would be the limit for cam deviation to be concerned of possible IMS issue?
I have durametric and will check this out - even though oil filter inspection by cutting it open is very clean.
__________________
Boxter 2.7 2001
pilot4fn is offline   Reply With Quote
Old 05-03-2020, 07:18 AM   #12
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,283
Quote:
Originally Posted by pilot4fn View Post
What would be the limit for cam deviation to be concerned of possible IMS issue?
I have durametric and will check this out - even though oil filter inspection by cutting it open is very clean.
+/- 6 degrees.
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 05-03-2020, 10:01 AM   #13
Registered User
 
Join Date: Jul 2019
Location: Finland
Posts: 75
Quote:
Originally Posted by JFP in PA View Post
+/- 6 degrees.
Thanks JFP!
__________________
Boxter 2.7 2001
pilot4fn is offline   Reply With Quote
Old 05-03-2020, 07:03 PM   #14
Registered User
 
Rickvd's Avatar
 
Join Date: Mar 2018
Location: Indiana
Posts: 101
Garage
When you graph the cam deviations if they are jumping around that is an issue. I have a copy of an article from a vibration analyst I can send if you are interested.
Rickvd is offline   Reply With Quote
Old 05-03-2020, 07:06 PM   #15
Registered User
 
Rickvd's Avatar
 
Join Date: Mar 2018
Location: Indiana
Posts: 101
Garage
The article is here Good Vibrations
Interesting reading. Rick
Rickvd is offline   Reply With Quote
Old 05-04-2020, 12:07 PM   #16
Registered User
 
Join Date: Jul 2019
Location: Finland
Posts: 75
Quote:
Originally Posted by Rickvd View Post
When you graph the cam deviations if they are jumping around that is an issue. I have a copy of an article from a vibration analyst I can send if you are interested.
Thanks Rick, Interesting reading.
Later on this week I'll check the cam deviation and especially if those are jumping around.

__________________
Boxter 2.7 2001
pilot4fn is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 08:36 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page