Main bearing pins, do you got em?! |
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Main bearing pins, do you got em?! |
-JR- |
Feb 17 2005, 11:58 PM
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#1
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Life goes faster at 150MPH Group: Members Posts: 276 Joined: 12-May 04 From: Victoria BC Canada Member No.: 2,055 |
I'm assembling my engine and it seems that the first and third main bearings never had locating pins to keep them from spinning.
It seems only number 2 has got locating pins on either half of the case. Should 1 and 3 circular bearings have locating pins? Anyone? Thanks! |
Dr Evil |
Feb 18 2005, 12:06 AM
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#2
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Don't they have an indentation in them that mates to a slight groove?
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-JR- |
Feb 18 2005, 12:10 AM
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#3
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Life goes faster at 150MPH Group: Members Posts: 276 Joined: 12-May 04 From: Victoria BC Canada Member No.: 2,055 |
Nope, you are thinking of the connecting rod and cam bearings.
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Dr Evil |
Feb 18 2005, 12:11 AM
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#4
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Nah, I'm thinking /6 (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
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-JR- |
Feb 18 2005, 12:58 AM
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#5
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Life goes faster at 150MPH Group: Members Posts: 276 Joined: 12-May 04 From: Victoria BC Canada Member No.: 2,055 |
Anyone else have some feedback?
You can see in the front here, where the front main bearing is, the oil gallery and the other hole is for a locating pin, which is missing in the picture and on my case too. (IMG:http://www.tunacan.net/t4/pics/type4serialnum.jpg) |
Jake Raby |
Feb 18 2005, 01:22 AM
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#6
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Yes, all bearings MUST have pins! The #1,3&4 only have one pin because they are full circle bearings. #2 has two pins because its a half shell bearing so it has one on each case half.
(If you had my video this question would not come up (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) ) The pins must be there to KEEP THE OILING PASSAGES IN THE BEARING ALIGNED WITH THOSE IN THE CASE... If they are not there, and the bearing spins - Kiss it good bye, All of it. I have the pins- 50 cents each and mine are the right length. (pins must be 8.0MM and no longer, else they will protrude into the bearing and wipe it out as soon as you torque the case up.. |
-JR- |
Feb 18 2005, 01:27 AM
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#7
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Life goes faster at 150MPH Group: Members Posts: 276 Joined: 12-May 04 From: Victoria BC Canada Member No.: 2,055 |
You know, that's what I was thinking too... The engine I took appart (not stock to begin) was missing those pins for the #1 and #3 full circle bearings.
Guess I'll have to go get me some! Thanks JAKE! |
bondo |
Feb 18 2005, 01:47 AM
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#8
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
you sure they're just not in the other half of the case?
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-JR- |
Feb 18 2005, 02:28 AM
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#9
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Life goes faster at 150MPH Group: Members Posts: 276 Joined: 12-May 04 From: Victoria BC Canada Member No.: 2,055 |
Nope, because on the full circle bearings there is only one pin used as opposed to the #2 main bearing where there are two physical halfs, so there are two pins in that case.
So either the pins dropped out somewhere when I broke it down, which I was very careful to take notes or they were not installed OR I had the case halfs run through a high temp parts washer which I suppose it's possible that the case heated up enough to drop the pins out. At any rate I need to get my hands on two of them before I can assemble the case. |
HarveyH |
Feb 18 2005, 06:51 AM
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#10
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Member Group: Members Posts: 450 Joined: 19-June 03 From: Downingtown, PA Member No.: 843 |
When the mechanic had my 2056 apart he found the previous builder used a couple of pieces of Allen Key as main bearing dowels (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)
The teardown was because they also didn't Loctite or stake the cam drive gear bolts (IMG:http://www.914world.com/bbs2/html/emoticons/ar15.gif) Harvey |
bondo |
Feb 18 2005, 11:08 AM
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#11
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
What the... I didn't write that... must be jkeyzer using my computer (he's visiting). I don't remember if the case I pulled that crank out of had the pins. I don't remember seeing them. I already tossed the case though, nobody seemed to want it because it was a bus case. |
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Mark Henry |
Feb 18 2005, 11:27 AM
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#12
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
That's why you pay more for a reputable engine builder. |
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