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Checking main and rod bearings for A15
Home away from home
Joined:
2015/11/10 17:48
From Fort Worth, Texas
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Posts: 213
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Plan to pick up some plastigage this afternoon and disassemble the crankshaft. Reading the information in Tech Wiki, the "bearing crush" tolerances is what I will use to determine if the bearings are within specs? And reading the Haynes shop manual the tolerances for end play is only at the thrust (center) bearing? Please explain the "bearing clearance" tolerances. Also I notice a slight lateral movement in both directions on all of the connecting rods, but not up and down. Is this normal? Engine has about 130K miles. Thanks for the help.

Bearing Clearance
* Main: 0.020 to 0.062 mm
* Rod: 0.020 to 0.050 mm
Main Bearing Journal diameter
* 49.951 to 49.964 mm
Crankpin Journal diameter
* 44.974 to 44.961 mm
Journal Taper and out of round
* measure multiple spots
* less than 0.03 mm
End-play
* crank thrust: 0.05 to 0.15 mm
Bearing Crush
* main: 0 to 0.03 mm
* rod: 0.015 to 0.040 mm

Posted on: 2016/1/14 18:54
Transfer the post to other applications Transfer

Subject Poster Date
     Checking main and rod bearings for A15 TexasMidget 2016/1/14 18:54
       Re: Checking main and rod bearings for A15 ddgonzal 2016/1/14 21:56
         Re: Checking main and rod bearings for A15 TexasMidget 2016/1/15 0:17
           Re: Checking main and rod bearings for A15 ddgonzal 2016/1/15 0:34
             Re: Checking main and rod bearings for A15 TexasMidget 2016/1/15 2:39
               Re: Checking main and rod bearings for A15 58custom 2016/1/15 3:43
                 Re: Checking main and rod bearings for A15 ddgonzal 2016/1/15 4:57
       Re: Checking main and rod bearings for A15 Rallytwit 2016/1/15 5:21
         Re: Checking main and rod bearings for A15 TexasMidget 2016/1/16 17:14
           Re: Checking main and rod bearings for A15 ddgonzal 2016/1/16 20:25
             Re: Checking main and rod bearings for A15 ddgonzal 2016/1/16 20:33
       Re: Checking main and rod bearings for A15 TexasMidget 2016/1/18 7:11
         Re: Checking main and rod bearings for A15 ddgonzal 2016/1/18 7:40
       Re: Checking main and rod bearings for A15 TexasMidget 2016/1/18 14:43
         Re: Checking main and rod bearings for A15 ddgonzal 2016/1/18 22:04




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