Help Support Bigcoupe.com

Pilot / spigot bearing in crankshaft (M/T shaft support)

Post here for mechanical and engine topics such as fuel issues, transmission problems, rough idle, exhaust, electrical issues, etc

Moderators: ron, bfons, GRNSHRK

Post Reply
jeme9
Posts: 15
Joined: Mon Feb 05, 2018 10:57 am
Location: Melbourne

Pilot / spigot bearing in crankshaft (M/T shaft support)

Post by jeme9 » Sun Jul 15, 2018 5:55 am

Hi, I am wanting to fit correct spigot bearing (needle vs ball bearing).

Current crank shaft has spacer / reducer from 32mm and then a needle bearing, although the cage and needles had separated from the needle bearing "outside" sleeve. I bought the engine so not sure when this had happened.
I am nervous about a new needle bearing also coming apart when installing gearbox.

a) If I was to go for ball bearing type, I would need to remove spacer / reducer from the crank.
Question has anyone had success in doing this (sounds harder than removing a the ball bearing).

b) Is there an advantage of the needle over the ball bearing ?

Thanks

Note: I am finding realoem a bit confusing for determining correct part. Suggest ball bearing, but engine had needle bearing.

Note: June 1979 645csi #5550216. Getrag G/B
Attachments
Spigot bearing.jpg
Spigot bearing.jpg (169.2 KiB) Viewed 303 times

User avatar
Ralph in Socal
Bigcoupe supporter
Posts: 2258
Joined: Tue Apr 14, 2009 3:32 am
Location: High Desert of SoCal

Re: Pilot / spigot bearing in crankshaft (M/T shaft support)

Post by Ralph in Socal » Sun Jul 15, 2018 8:58 pm

I would opt for the Ball Bearing unit. I have seen multiple issues with the needle bearing coming apart as yours. The only issue I have encountered with the Ball Bearing unit was the trans input shaft had become semi fused to the inner race so I basically pulled the pilot bearing (with the trans) to separate the trans fom the motor. Bearing pulled off the input shaft after they were apart but of course the clutch had to go with the trans too. Just make sure to lube the input shaft and the inner race prior to assembly.

Ralph
There is a very fine line between "Hobby" and Mental Illness.

85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)

jeme9
Posts: 15
Joined: Mon Feb 05, 2018 10:57 am
Location: Melbourne

Re: Pilot / spigot bearing in crankshaft (M/T shaft support)

Post by jeme9 » Sun Jul 15, 2018 10:15 pm

Thanks Ralph,
have you had any experience on removing the reducer / spacer to enable going to the larger diameter ball bearing ? thanks

User avatar
Ralph in Socal
Bigcoupe supporter
Posts: 2258
Joined: Tue Apr 14, 2009 3:32 am
Location: High Desert of SoCal

Re: Pilot / spigot bearing in crankshaft (M/T shaft support)

Post by Ralph in Socal » Wed Jul 25, 2018 10:00 pm

Not had the pleasure yet but with the Crank Flange threads available you should be able to mount a puller easily. Spray a little bit of fine lubricant to help release the “bond” between the spacer and crank

Ralph
There is a very fine line between "Hobby" and Mental Illness.

85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)

Post Reply

Who is online

Users browsing this forum: No registered users and 15 guests