Crankshaft

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February 21st, 2014 | 12:52 AM

RonzBoyz4

Thread Starter

Registered User

Joined: Aug 2012

Posts: 39

From: DoD n Stuttgart GE

Crankshaft

Team,
I am putting my stuff on my motor. After torqueing the main crank caps, I have "play" on the crank. I noticed it when I picked up on the crank shaft to reposition the engine.

How much distance/clearance should there be on the main caps to the crank?

Thanks,

Bearing Set
SLP-4281M
---- Engine ----
1968
350
Block# 395558 2

---

I found:
.0004 - 0021
# 5 .0015 - 0031

Last edited by RonzBoyz4; February 21st, 2014 at 04:31 AM. Reason: More info

February 21st, 2014 | 06:18 AM

cutlassefi

Registered User

Joined: Nov 2008

Posts: 7,987

From: Central Fl

Quote:

Originally Posted by RonzBoyz4

I'm not sure how you can feel play with those tight clearances. Less than a half thousandths on a main will almost guarantee a spun bearing.

February 24th, 2014 | 06:58 AM

RonzBoyz4

Thread Starter

Registered User

Joined: Aug 2012

Posts: 39

From: DoD n Stuttgart GE

1968 Crankshaft

So, I came to the conclusion, the crank must have been turned, at least once, in the last 45 years....

When my plastigauge arrives, I will see just how much and order the correct bearings....

Anyone need a set of new bearings?

Thanks

http://www.oldsmobility.com/old/enginespecs.htm#Crankshaft_Bearing_Journal_Specifi cations

Last edited by RonzBoyz4; February 26th, 2014 at 02:17 AM. Reason: Corrections