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Old 05-12-2013, 01:21 PM   #1
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would a bad AOS cause a strong oily odour around my car after shutting it off?
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Old 05-13-2013, 11:00 PM   #2
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Have any of you replaced the transmission Main Shaft Seal? Any advice? Thinking I want to do that since I have the transmission out.

And Paul, thank you for posting the pics of your work.
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Old 05-14-2013, 05:07 AM   #3
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On a 6 Speed… Instructions say to drill a hole and insert a drywall-type screw and then, using prybar/pliers you can extract. I found that part to be true.

The tricky part was putting the transmission seal back in! Make sure you get it in FAR ENOUGH! If you are replacing the Throwout Bearing guide Sleeve, as you should, take the old one, invert it, and insert it FORCEFULLY (up to and including banging it with a mallet HARD). It MUST SEAT very well up against the lip of the transmission housing to seal.

My PO did not seal it well and ruined the clutch/flywheel/Throwout Bearing. There was also a couple pounds of grease mixed with dirt INSIDE the tranny housing…it was a mess!

TEST IT BEFORE YOU INSTALL:
CAREFULLY tip the transmission housing forward so you can test the seal for runs, drips or errors. Also, IF you notice ANY transmission fluid leaking out at time of re-assembly… the seal is NOT SEATED ENOUGH.

Here is a pic of the seal in question.


Again, this is a Boxster S model, with a 6 speed. The 5 speed has a larger flange and is a larger diameter.

Hope that helps you get it together!


Quote:
Originally Posted by drbodzin View Post
Have any of you replaced the transmission Main Shaft Seal? Any advice? Thinking I want to do that since I have the transmission out.

And Paul, thank you for posting the pics of your work.
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Old 05-14-2013, 08:18 PM   #4
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Homeboy, thanks for that detail instruction on Main Shaft Seal. That will help me a a lot.
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Old 05-14-2013, 08:29 PM   #5
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Today I drained the oil, removed the flywheel and cleaned up the back of the engine to get ready for the RMS and IMS replacement work. I also decided to get a new flywheel. The old one is probably ok, but what the heck.

I was surprise to see the the rear of the engine was not as messy as I had expected. I thought I would see evidence of oil leak, but not so much.

Here are the pics before I cleaned it up. If any of you have any thoughts about what you see, let me know.







And here it is after some clean-up.



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Old 05-15-2013, 10:24 AM   #6
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jeez, now I wish I had cleaned mine before I put the clutch and flywheel on again...a car that's loved , shows it
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Old 05-15-2013, 10:35 AM   #7
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Quote:
Originally Posted by drbodzin View Post
Today I drained the oil, removed the flywheel and cleaned up the back of the engine to get ready for the RMS and IMS replacement work. I also decided to get a new flywheel. The old one is probably ok, but what the heck.

I was surprise to see the the rear of the engine was not as messy as I had expected. I thought I would see evidence of oil leak, but not so much.

Here are the pics before I cleaned it up. If any of you have any thoughts about what you see, let me know.







And here it is after some clean-up.



Looks like the leak is from the IMSB flange, so good catch. Did you check the cam deviation before you took it apart? Was there any metal in the oil filter or the sump plate?

Keep the updates coming.
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Old 05-15-2013, 03:32 PM   #8
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Hi san rensho,

The after pictures you are referring too are "just" the cleanup of the engine case. I still have not replaced the IMS yet. But I thought the same thing about where the leak was coming from.

There wasn't any metal in the oil. I plan on removing the RMS and IMS tonight or tomorrow. I will post pics once I do.

However, there is a ton of oil in the bell housing of the transmission. So I am also thinking it could also be from the transmission Mail Seal, as it is much oilier than the engine was.
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Old 05-18-2013, 11:24 AM   #9
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My trans is from a Base 1998 and has the main seal as part of the throw out bearing guide tube. Does anyone know the Torque Values for the three screws that hold the guide tube? I can't locate then anywhere.

Quote:
Originally Posted by Homeboy981 View Post
On a 6 Speed… Instructions say to drill a hole and insert a drywall-type screw and then, using prybar/pliers you can extract. I found that part to be true.

The tricky part was putting the transmission seal back in! Make sure you get it in FAR ENOUGH! If you are replacing the Throwout Bearing guide Sleeve, as you should, take the old one, invert it, and insert it FORCEFULLY (up to and including banging it with a mallet HARD). It MUST SEAT very well up against the lip of the transmission housing to seal.

My PO did not seal it well and ruined the clutch/flywheel/Throwout Bearing. There was also a couple pounds of grease mixed with dirt INSIDE the tranny housing…it was a mess!

TEST IT BEFORE YOU INSTALL:
CAREFULLY tip the transmission housing forward so you can test the seal for runs, drips or errors. Also, IF you notice ANY transmission fluid leaking out at time of re-assembly… the seal is NOT SEATED ENOUGH.

Here is a pic of the seal in question.


Again, this is a Boxster S model, with a 6 speed. The 5 speed has a larger flange and is a larger diameter.

Hope that helps you get it together!
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