Main Bearing Clearance? - Competition Diesel.Com

Blackbumper · 05-28-2009, 12:31 AM

Does anyone know what the stock main bearing clearances are Min Max? I have been searching my manuals and all I can find is end play.
Thanks

*GOT-Torque* · 05-28-2009, 01:04 AM

This is out of my manual for an 01... Not sure if it would be the same or not (I assume it would be)?

MAIN BEARING BORE DIAMETER CHART
ITEM MAIN BEARING BORE
DIAMETER (MAXIMUM)
A 83.106 mm 3.2719 in.)
Measure the diameter of the main journal at the
locations shown (Fig. 102). Calculate the average
diameter for each side of the journal.

CRANKSHAFT MAIN JOURNAL DIAMETER
CHART
ITEM SPECIFICATION
MINIMUM DIAMETER 82.962 mm (3.2662 in.)
MAXIMUM DIAMETER 83.013 mm (3.2682 in.)
Calculate the main bearing journal to bearing
clearance. the clearance specifications are 0.119 mm
(0.00475 inch). If the crankshaft journal is within
limits, replace the main bearings. If not within specifications,
grind the crankshaft to next size and use
oversize bearings.

05-28-2009, 12:31 AM	#1
Blackbumper Name: Blackbumper Title: Could be worse! Status: Not Here Join Date: Dec 2006 Location: Nebraska Member`s Gallery Posts: 364	Main Bearing Clearance? Does anyone know what the stock main bearing clearances are Min Max? I have been searching my manuals and all I can find is end play. Thanks __________________ 2006 Dodge Mega Cab 1994 Dodge 2500 4x4 Reg Cab 5spd 3.55's, s400, 13mm pump. Hamilton Diesel Top end and cam,

05-28-2009, 01:04 AM	#2
GOT-Torque Name: GOT-Torque Title: is Status: Not Here Join Date: Jul 2007 Location: Falls City, NE Member`s Gallery Posts: 5,284	This is out of my manual for an 01... Not sure if it would be the same or not (I assume it would be)? MAIN BEARING BORE DIAMETER CHART ITEM MAIN BEARING BORE DIAMETER (MAXIMUM) A 83.106 mm 3.2719 in.) Measure the diameter of the main journal at the locations shown (Fig. 102). Calculate the average diameter for each side of the journal. CRANKSHAFT MAIN JOURNAL DIAMETER CHART ITEM SPECIFICATION MINIMUM DIAMETER 82.962 mm (3.2662 in.) MAXIMUM DIAMETER 83.013 mm (3.2682 in.) Calculate the main bearing journal to bearing clearance. the clearance specifications are 0.119 mm (0.00475 inch). If the crankshaft journal is within limits, replace the main bearings. If not within specifications, grind the crankshaft to next size and use oversize bearings. __________________ "Enjoy the little things in life, because one day you will look back, and realize they were the big things" EATSOOT.com Last edited by GOT-Torque; 05-28-2009 at 01:16 AM.