Crankshaft play

Tiny
BLAZEJ
  • MEMBER
  • 2010 FORD F-150
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Hi.
I'm from Poland and this is my first time repairing an engine like this. Your videos are great and have helped me a lot.
In the video (How to Build a Ford 5.4L 3V Engine - Part 4: Clean and Crankshaft Install) at 32 minutes you check the clearance along the crankshaft? What is the allowable clearance? My engine has 0.55mm of clearance, despite new bearings. Are larger bearings available to reduce the clearance?
Sunday, August 31st, 2025 AT 1:01 PM

8 Replies

Tiny
MECHTRIX
  • MECHANIC
  • 382 POSTS
Yes there are many bearings that will correct the clearance. But first measure everything 3 time from different angles and write down the results for each one. So to start
Are you sure of that measument? 0.55 is a bit more than a half mm
Woch would be way out of tolerance that would be 21.7 thousnths of an inch wiich is crazy out of tolerance.
So check the and right it down and let me know becuase if it was 0.055mm then ot would be 2.2 thousands that would be good so please check it and while you doing this job right everything down there gonna be quite alot to record as you move forward. Let us know the truest measurement you get ok? While we look up the specs for you . Thanks
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Sunday, August 31st, 2025 AT 1:26 PM
Tiny
MECHTRIX
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So the crankshaft main bearin journal
clearance specs
Is 0.024 to 0.048 mm. If you need anything else let us know good luck
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Sunday, August 31st, 2025 AT 1:51 PM
Tiny
BLAZEJ
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Yes, I'm sure about this measurement. I know it's a very large clearance. The crankshaft has been repaired. I'll try to find or fabricate oversized bearings. Please tell me the correct clearance.
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Sunday, August 31st, 2025 AT 2:18 PM
Tiny
MECHTRIX
  • MECHANIC
  • 382 POSTS
All sizes are availible
If you have a crankshaft machinist near you I'd just have the ground back to standard and use standard sized bearings. Also might have it balanced while you're at it
Good luck
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Sunday, August 31st, 2025 AT 2:23 PM
Tiny
BLAZEJ
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I'm talking about the clearance on the thrust washer
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Sunday, August 31st, 2025 AT 2:23 PM
Tiny
MECHTRIX
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Ok that's different the endplay clearance is 0.075 to 0377 mm good luck
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+1
Sunday, August 31st, 2025 AT 2:26 PM
Tiny
BLAZEJ
  • MEMBER
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You helped me a lot. Thank you.
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Sunday, August 31st, 2025 AT 2:28 PM
Tiny
MECHTRIX
  • MECHANIC
  • 382 POSTS
Glad to help enjoy your project if theres anything else let us know be well"
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Sunday, August 31st, 2025 AT 2:32 PM

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