LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Pilot bearing

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Old 02-15-2012, 07:07 AM
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Default Pilot bearing

Okay I got the pilot bearing out of the crank lastnight which was a bitc* !
Anyways what is the best way or some tips to put the new one in
Old 02-15-2012, 07:19 AM
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Did you use a pilot bearing puller? it makes it soooo easy. Also I used a socket that is about a size smaller than the diameter of the bearing and tapped it in slowly.
Old 02-15-2012, 07:22 AM
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Ya I used a puller but I broke one hook that was a smaller hook and then the center on the bearing came out then I was able to get a bigger hook in there to pull on it
Old 02-15-2012, 07:26 AM
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First thing to do to install it is leave it in the freezer for several hours. Doing this, it will slightly contract and make install easier.

Most people use a deep well socket which works fine. Just ensure that you dont collapse or pinch the hole where input stub goes which you can avoid by using the largest socket possible.
Old 02-15-2012, 07:33 AM
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I put it in the freezer over night so that's one thing that I did do so I will try the socket thanks guys
Old 02-15-2012, 09:06 AM
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I used a piece of wood and a hammer to drive the thing in without mangling the surface. It was a cut up table leg that had been sitting around the garage for some time.
Old 02-15-2012, 09:31 AM
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^^^ use a wood dowel like a piece of closet hanger round dowel. best not to use metal.

fwiw just did it a few weeks ago. used the autozone blind hole puller. worked perfect and then used a 6" piece of round dowel to pound it in.
Old 02-15-2012, 10:29 AM
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I've always used a piece of wood and a hammer.
Old 02-15-2012, 07:03 PM
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wooden dowel and a hammer, was a tight fit.... like OJ's glove.
Old 02-15-2012, 07:06 PM
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i use dry ice to freeze it and they go right in with barley any effort.
Old 02-15-2012, 09:16 PM
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Originally Posted by tt383lt1
i use dry ice to freeze it and they go right in with barley any effort.
Yep thats the way to go.

Also you can removed them with a socket. First find a socket just a bit smaller than the ID of the old brg. I used a metric 1/4 drive deep socket. Second Tape over the 1/4 drive slot. Fill the pilot brg cavity with grease. Third Just tap the socket in. The pressure you created pushing the socket into the grease will push the brg out. ITS CAKE
Old 02-16-2012, 06:19 AM
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A piece wood, or part of a broomstick handle or a socket that is slightly larger than the bearing diameter will do.
Old 02-16-2012, 08:04 AM
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I must have used a socket slightly larger like you guys have said, not smaller. I used whatever was recommended when I did a search.
Old 02-16-2012, 08:43 AM
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An interesting thing I saw a while back when I had a pilot bearing failure.

I saw that one third of the pilot bushing was not worn at all as a result of never making contact with the stub on the end of the input shaft. I then conducted a series of measurements and determined that the only 2/3 of the input stub contacts the pilot bushing. Obviously this is not desirable.

When I installed the new pilot bushing, I decided to leave it sticking out of the crank hole by 1/4" as opposed to driving it in all the way like I have every time previously. I figure now, the stub on the input shaft will now make more complete contact with the pilot bushing. If this is the case, clearly the bushing will last longer and the stub will be better supported.

Clearly, if if what I did leaving the pilot sticking out further were a problem, then the tranny would not have slid into final position when being reinstalled. Also this guarantees greater contact with the drive stub on longevity of the pilot bushing.

Just my 2 cents.

Last edited by wrd1972; 02-16-2012 at 08:53 AM.



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