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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 12-18-2011, 01:49 PM
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Beltane Beltane is online now
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Clutch - thought Throw-out bearing now Pilot Shaft bearing?

Folks ~

Here's the original thread:
http://www.bimmerfest.com/forums/sho...68#post6478268

The mechanic just left me a message stating that I now need a 'pilot shaft bearing'. What is this? They said they have to order it from BMW (that scares me) and I did a quick search here and I didn't find anything. Any advice???? I've never needed ANYTHING that I couldn't search on this forum for!
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Old 12-18-2011, 02:06 PM
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The pilot bearing (or bushing) is located on the end of the crankshaft, the input shaft of the trans slips inside it. When they wear out, it causes unwanted vibration at that junction. They are sometimes a pain in the ass to remove.
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Old 12-18-2011, 02:14 PM
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Quote:
Originally Posted by Fast Bob View Post
The pilot bearing (or bushing) is located on the end of the crankshaft, the input shaft of the trans slips inside it. When they wear out, it causes unwanted vibration at that junction. They are sometimes a pain in the ass to remove.
They cost about $12 and no need to get them from BMW. It is no bigger than a 50 cent piece.

Also, if they did a clutch job for you in August and didn't replace it while doing the job find a COMPETENT mechanic. Any mechanic worth his salt will tell you that you ALWAYS replace the pilot bearing when doing a clutch job. It is common sense.

Also, I still think it is your flywheel. A bad pilot bearing would cause a LOT of vibration when driving.
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Old 12-18-2011, 02:26 PM
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Thank you Fast Bob and Smolck. I was anxiously awaiting your replies.

Yes - The mechanic I've had has been fine, but now with these bigger jobs I see that I really need to take it somewhere else. He's a general mechanic, but I guess just not a great one for my car. I did a search last week and there is a BMW indy mechanic a ways up the road for me.

I really appreciate you both taking the time to respond.

Hope you both have a wonderful holiday.

Laurie
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Old 12-18-2011, 04:01 PM
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Quote:
Originally Posted by Beltane View Post
Thank you Fast Bob and Smolck. I was anxiously awaiting your replies.

Yes - The mechanic I've had has been fine, but now with these bigger jobs I see that I really need to take it somewhere else. He's a general mechanic, but I guess just not a great one for my car. I did a search last week and there is a BMW indy mechanic a ways up the road for me.

I really appreciate you both taking the time to respond.

Hope you both have a wonderful holiday.

Laurie
Even a "general" mechanic working on ANY car should know you ALWAYS put a NEW pilot bearing in whenever you remove the clutch. It is kinda of like putting oil back in a car during an oil change, goes without saying.
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Old 12-18-2011, 04:12 PM
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Originally Posted by smolck View Post
Even a "general" mechanic working on ANY car should know you ALWAYS put a NEW pilot bearing in whenever you remove the clutch. It is kinda of like putting oil back in a car during an oil change, goes without saying.
This ^^^^^^^^^^^^^^ for sure. It`s a lot of work taking everything apart, so replacing the pilot bearing and throwout bearing while doing a clutch job is just common sense.

BMW has brought us many things that might sound good on paper, but don`t work so well in the real world....the dual-mass flywheel is one of them.... I would much prefer a solid, one-piece billet flywheel.
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Old 12-18-2011, 04:57 PM
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It's usually a bushing, not a bearing. And normally oil-lite bronze. The first motion shaft of the gearbox fits inside it. They can be stubborn to remove, but if you fill it with grease and whack it with a punch that fits just inside the ID, they normally pop right out.
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