Difficulty
Moderate
Steps
6
Time Required
1 - 3 hours
Sections
1
- Main Bearings
- 6 steps
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0
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Introduction
The main bearings on a vehicle are what makes it possible for the crankshaft to rotate smoothly inside the engine. A bearing is needed for anything that runs in a circular motion to run smoothly, these main bearings are between the caps and the crankshaft in order to give it that smooth, frictionless surface.
What you need
Step 1
Main Bearings
- Remove the 18 bolts holding the oil pan in place (fourteen ⅜” bolts & four ½” bolts on each corner) and remove oil pan using the 3⁄8 and 1⁄2 sockets, 6 inch extension and 3⁄8 ratchet.
- Do not remove the oil pan gasket yet.
Remove the 18 bolts holding the oil pan in place (fourteen ⅜” bolts & four ½” bolts on each corner) and remove oil pan using the 3⁄8 and 1⁄2 sockets, 6 inch extension and 3⁄8 ratchet.
Do not remove the oil pan gasket yet.
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Step 2
- Remove the 5 main bearing caps.
- Three caps with four ⅝ bolts and two caps with two ⅝ bolts at the front and rear of crankshaft.
- Gently tap the side of the cap with a rubber mallet if needed to break free.
- DO NOT SWAP THE LOCATIONS OR DIRECTIONS OF THE CAPS.
Remove the 5 main bearing caps.
Three caps with four ⅝ bolts and two caps with two ⅝ bolts at the front and rear of crankshaft.
Gently tap the side of the cap with a rubber mallet if needed to break free.
DO NOT SWAP THE LOCATIONS OR DIRECTIONS OF THE CAPS.
Step 3
- Remove and replace main bearings.
- Liberally apply assembly lubricant/oil to the new bearing surfaces and crankshaft journal.
- Gently tap the cap against the engine block or use a thin flathead to remove.
Remove and replace main bearings.
Liberally apply assembly lubricant/oil to the new bearing surfaces and crankshaft journal.
Gently tap the cap against the engine block or use a thin flathead to remove.
Step 4
- Put the main bearing caps back.
- Three caps with four ⅝ bolts and two caps with two ⅝ bolts at the front and rear of crankshaft and torque to specs. (65 ft.-lbs.)
- Do not swap the locations or directions of the caps during reinstallation. (reverse of removal)
Put the main bearing caps back.
Three caps with four ⅝ bolts and two caps with two ⅝ bolts at the front and rear of crankshaft and torque to specs. (65 ft.-lbs.)
Do not swap the locations or directions of the caps during reinstallation. (reverse of removal)
Step 5
- Replace the oil pan gasket.
- Use a razor blade, flathead screwdriver or putty knife to clean up the old gasket and wipe down where the old gasket was with brake cleaner and paper towels before placing a new gasket.
- Be careful not to drop any gasket debris into the engine.
Replace the oil pan gasket.
Use a razor blade, flathead screwdriver or putty knife to clean up the old gasket and wipe down where the old gasket was with brake cleaner and paper towels before placing a new gasket.
Be careful not to drop any gasket debris into the engine.
Step 6
- Put the oil pan back into place.
- Fourteen ⅜” bolts & four ½” bolts on each corner) and torque bolts to specs. (12 ft.-lbs.) (reverse of removal)
Put the oil pan back into place.
Fourteen ⅜” bolts & four ½” bolts on each corner) and torque bolts to specs. (12 ft.-lbs.) (reverse of removal)
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Author
with 3 other contributors
Thomas Nichols
Member since: 11/04/2019
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Team
University of Memphis, Team S4-G3, Kim Fall 2019
Member of University of Memphis, Team S4-G3, Kim Fall 2019
UM-KIM-F19S4G3
3 Members
5 Guides authored
