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Main bearing & rod bearing journal clearances for 440.. #150800 11/14/08 12:19 PM 11/14/08 12:19 PM
Joined: Jan 2003 Posts: 2,402 Wichita,KS B Blakcharger440 OP top fuel
Blakcharger440 OP top fuel B Joined: Jan 2003 Posts: 2,402 Wichita,KS	I am getting ready to use some plastigauge in determining how much clearance I have at the main and rod journals. What parameter of clearance would be good for the mains and what would be good for the rods? These should always be checked dry correct? This is for a standard bearing size 4.25 stroke RB crank

Re: Main bearing & rod bearing journal clearances for 4 [Re: Blakcharger440] #150801 11/14/08 12:21 PM 11/14/08 12:21 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	We never to go over .002 on either the rods or mains. Never had a problem with those clearances on the engines we run on the street or strip.

Re: Main bearing & rod bearing journal clearances for 440.. [Re: Blakcharger440] #150802 11/14/08 12:34 PM 11/14/08 12:34 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: These should always be checked dry correct? yes both bearing halves/journal dry & be careful when you set the crank down that you dont rotate it & I always grab a helper to eyeball things underneath so the crank goes down where it's supposed to & doesn't get nicked. live every 24 hour block of time like it's your last day on earth

Re: Main bearing & rod bearing journal clearances for 440.. [Re: RapidRobert] #150803 11/14/08 01:28 PM 11/14/08 01:28 PM
Joined: Feb 2003 Posts: 12,675 Columbia, CT M moper I Live Here
moper I Live Here M Joined: Feb 2003 Posts: 12,675 Columbia, CT	.002-.0025 on mains, .0025-.003 on rods. I have gone tighter before... I never go bigger. Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.

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