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Posted by: VegasRacer Mar 14 2004, 02:04 PM

The last time I raced in November I blew out the main transmission seal. This time it was the right half shaft seal. I'm thinking there must be some other problem to cause these failures. Any ideas???

There were 4 other 914's at the VARA race this weekend besides mine. All of the others were sixes.
Frank Beck won easily from the pole position.


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Posted by: Brad Roberts Mar 14 2004, 02:08 PM

Just about every time we install a LSD in a 901 we have to stake the output shaft seals. It shouldnt have ended your day.. just made a mess.

You have probably already checked.. but make sure the breather is pointed the correct direction and not blocked in any form or fashion.

You may also want to increase the size of the breather and take it to a trunk mounted "catch can" or something. We install a -6 (or -8) I forget unless I'm standing over a tranny.. and run the line from that.

Too much internal pressure.


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Posted by: Brad Roberts Mar 14 2004, 02:10 PM

It sucks being poor. Seeing peoples event pics makes me I should be at Buttonwillow for a PCA Time Trial.. but NO.. I had to F myself.


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Posted by: VegasRacer Mar 14 2004, 02:12 PM

mine


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Posted by: Aaron Cox Mar 14 2004, 02:13 PM

is it me or do those fuchs on the red car looks super deep and like 17"

Posted by: Brad Roberts Mar 14 2004, 02:13 PM

Yeah.. gear lube on the headers.. YEEHAW..LOL

Clean up your mess.. you know better.. brake cleaner and some rags...


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Posted by: VegasRacer Mar 14 2004, 02:18 PM

Yea, I checked that first. The breather was not clogged and it was pointed the right way. Last time I was able to find a new main seal and replace it in time for the green flag. This time I could not locate a half shaft seal.

Towing home early sucks. At least it was only a half hour drive to feel sorry for myself this time.

Aaron - 15 x 7 inch wheels are all that is allowed. 205's on the front. 225's on the rear.

Posted by: Brad Roberts Mar 14 2004, 02:22 PM

Move to the bigger breather setup. What RPM are you turning this engine ?


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Posted by: VegasRacer Mar 14 2004, 02:24 PM

7000 rmp

Posted by: Brad Roberts Mar 14 2004, 02:30 PM

Um.. YEAH !! you have to go to a bigger breather... no wonder you are having issues.

The little 1.8 engines at 8k RPM sling shit everywhere.. we learned the hardway on how to keep everything inside the cases.. gotta figure the input shaft is turning 7K also.. torque normally kicks the side seals out with some internal pressure added in.



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Posted by: VegasRacer Mar 14 2004, 02:37 PM

Thanks Brad. I'll give it a try.

Posted by: Brad Roberts Mar 14 2004, 02:49 PM

Pretty cheap easy fix...


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Posted by: VegasRacer Mar 14 2004, 02:51 PM

I dated her.

Posted by: seanery Mar 14 2004, 04:02 PM

Hell, I'd settle for one of the 3

Posted by: VegasRacer May 6 2004, 06:10 PM

Brad - Got any more ideas?
I blew out the main seal again.
I put in a bigger breather with a catch in the rear trunk.
What else can I do to fix the problem

Posted by: Brad Roberts May 6 2004, 07:38 PM

Main seal or output flange seal ??

What does your pilot bearing look like ?? Is the shaft moving around.. like something else in the box is failing and causing the seal to drop out ?

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Posted by: VegasRacer May 6 2004, 09:03 PM

Main seal is the one that leaked (again) this time.
I was also thinking maybe the pilot bearing.
I am not going to have a chance to drop the tranny until next week to check it out.

If I shift at 6000 rpm everything is fine.
When I push it to 7000 plus is when it fails.

Posted by: Brad Roberts May 6 2004, 11:52 PM

I'm betting the pilot is toast and it is allowing the input shaft to move around (a lot)


I have seen it a few times on the V8 conversion cars.


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Posted by: 4WheelDrifter May 7 2004, 09:23 AM

I'm still laughing at the "Eskimo sex" mention in the subject.

Posted by: VegasRacer May 11 2004, 10:45 PM

Attached is a photo of the pilot bearing.
Say what? You don't see a picture?
That's because there was no pilot bearing!
I dropped the tranny and pulled the fly wheel.
There was nothing in the center.
The PO had balanced and lightened the fly wheel.
I can't remember ever doing anything to it since I bought the car.
Is it really possible that I have been driving it for 7 years with no pilot bearing?

The hole for the bearing is very rough with lots of sharp edges inside.
The shaft only has a few light scuffs that will buff out easily.
I also found that the material sandwiched in the pressure plate is breaking apart.

I am feeling very lucky and very stupid.

Easy fix.
Get new fly wheel and have it machined to match.
Install pilot bearing.
Get new 6 spring early 911 pressure plate.
Drive it 'till I break something else.