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Rod bearing pic #1543728 12/04/13 05:06 PM 12/04/13 05:06 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Let me know what you think of the pattern. 7946876-rodbearing.jpg (278 downloads) GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543729 12/04/13 05:50 PM 12/04/13 05:50 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	My guess is accelerated wear due to poor journal finish. You got others that look like that? Fastest 300

Re: Rod bearing pic [Re: Clanton] #1543730 12/04/13 06:15 PM 12/04/13 06:15 PM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	any chance you could take a picture with better lighting and also a picture of the back of the bearing shells? From what I see it doesn't look good, that's for sure. machine shop owner and engine builder

Re: Rod bearing pic [Re: Crizila] #1543731 12/04/13 06:53 PM 12/04/13 06:53 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	The oil had some carbon in it from a rich tune so that may be the finish issue you think you see.Or maybe not but the crank was fresh from Moldex.The back of the bearings show no sign of knock.[like new] ps:I made about 40 passes on this engine. Last edited by Clanton; 12/04/13 06:55 PM. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543732 12/04/13 07:02 PM 12/04/13 07:02 PM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	A better picture would sure help, even if it had carbon in the oil. It looks like you have an uneven wear pattern that goes all the way to the parting line. Or maybe it's just that the pic is so dark I can't really tell. machine shop owner and engine builder

Re: Rod bearing pic [Re: Performance Only] #1543733 12/04/13 07:11 PM 12/04/13 07:11 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	I will work on a better pic.I wonder if the pattern is from the rod walking back/forth on the crank..003 clearence,.025 side,15/40 oil,hv pump,80 psi. Last edited by Clanton; 12/04/13 07:12 PM. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543734 12/04/13 07:15 PM 12/04/13 07:15 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: I will work on a better pic.I wonder if the pattern is from the rod walking back/forth on the crank..003 clearence,.025 side,15/40 oil,hv pump,80 psi. Actually, that's a pretty good pic. Polish the crank, fresh bearings, and party down. Again, do the other bearings look like that? Fastest 300

Re: Rod bearing pic [Re: Crizila] #1543735 12/04/13 07:30 PM 12/04/13 07:30 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	I only checked 1 rod so far. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543736 12/04/13 10:29 PM 12/04/13 10:29 PM
Joined: Jan 2003 Posts: 5,762 Hot Rod Ridge FastmOp master
FastmOp master Joined: Jan 2003 Posts: 5,762 Hot Rod Ridge	I like to take a ball bearing and a 0-1 micrometer and measure the upper bearing shell. You can measure the crush and tell if it had detonation. Anything more then a couple tenths (.0002) and the tune up is too close to the edge. If it measures the same as the bottom 1/2 just wipe those off with a wore out green pad and reuse them I don't really like .003 for clearance. I'd want .002 but I'm no expert.

Re: Rod bearing pic [Re: FastmOp] #1543737 12/04/13 10:55 PM 12/04/13 10:55 PM
Joined: Jan 2003 Posts: 6,591 Canton, Ohio S Sport440 master
Sport440 master S Joined: Jan 2003 Posts: 6,591 Canton, Ohio	Im no expert, but I dont see him having .003 clearence. It looks to me that somethings not perfectly round. He's got variable clearence IMO. Id like to see the other rod bearings as well when Mike gets to that point.

Re: Rod bearing pic [Re: Sport440] #1543738 12/05/13 12:24 AM 12/05/13 12:24 AM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	I think the others will be the same.I just happin to have the ball bearings from Steret.[sp]This is not the 1st time I have seen this and I do think the rods are moving making the marks as they are.I will get to the others this wk. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543739 12/05/13 12:38 AM 12/05/13 12:38 AM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	i'd want to know why that cap insert is worn on one side. as for bearing thickness a ball micrometer works nice

Re: Rod bearing pic [Re: jamesc] #1543740 12/05/13 11:55 AM 12/05/13 11:55 AM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Quote: i'd want to know why that cap insert is worn on one side. I posted the pic to find that out if I can.I can not measure the crank with the engine in the car very easy but all rods & bearings were measured with a good bore gauge to begin with. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543741 12/05/13 12:15 PM 12/05/13 12:15 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: Quote: i'd want to know why that cap insert is worn on one side. I posted the pic to find that out if I can.I can not measure the crank with the engine in the car very easy but all rods & bearings were measured with a good bore gauge to begin with. No 2 ways that the cap/rod/crank journal are not perfectly straight. That's a gimmie. IMO, it is exaggerated by the high bearing wear and coloration of the majority of what's left of the top bearing surface. Most bearing wear charts will show that surface consistency as being caused by poor journal finish - whether the crank was new or not. A better determination can be made when he pulls the other caps off. If they all look similar to this one, I'm stickin with journal finish. Fastest 300

Re: Rod bearing pic [Re: Crizila] #1543742 12/05/13 12:27 PM 12/05/13 12:27 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	I wont say anything till I see the others... but the one edge looks like it doesnt have the radius for the crank or enough radius for it

Re: Rod bearing pic [Re: Performance Only] #1543743 12/05/13 12:45 PM 12/05/13 12:45 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH Taking time off to work on my car
BradH Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Quote: From what I see it doesn't look good, that's for sure. And that's the only comment I feel qualified to make on this subject. I've run lesser powered engines far longer and the bearings from those engines -- while not ideal -- came out with much more consistent wear characteristics.

Re: Rod bearing pic [Re: MR_P_BODY] #1543744 12/05/13 12:53 PM 12/05/13 12:53 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: I wont say anything till I see the others... but the one edge looks like it doesnt have the radius for the crank or enough radius for it I saw that too, but the pic does not show the radius side ( crank fillet side )of the cap or rod, so IMO, inconclusive. Fastest 300

Re: Rod bearing pic [Re: Crizila] #1543745 12/05/13 01:08 PM 12/05/13 01:08 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Typical of an engine that is constantly being loaded and unloaded by RPM and torque loads and compression pressure in the cylinders.We see this on our blower engine frequently.Sometimes the rods will kick to the crank and also show radius marking. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Rod bearing pic [Re: MR_P_BODY] #1543746 12/05/13 01:20 PM 12/05/13 01:20 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Quote: I wont say anything till I see the others... but the one edge looks like it doesnt have the radius for the crank or enough radius for it The radius on the bearings were turned down to clear the crank.[SLP-8-7135ch .010] I will try to do 2 more rods on another crank throw. Last edited by Clanton; 12/05/13 01:23 PM. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543747 12/05/13 01:27 PM 12/05/13 01:27 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: I wont say anything till I see the others... but the one edge looks like it doesnt have the radius for the crank or enough radius for it The radius on the bearings were turned down to clear the crank.[SLP-8-7135ch .010] I will try to do 2 more rods on another crank throw. Did you verify that they clear the fillet... put a slight side pressure on the rod and use a feeler gauge between the crank and rod... I had to cut the bearings on a couple of my engines and at first I thought I had it till I checked it with the feeler gauge and had to go back and add more

Re: Rod bearing pic [Re: B G Racing] #1543748 12/05/13 01:28 PM 12/05/13 01:28 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Quote: Typical of an engine that is constantly being loaded and unloaded by RPM and torque loads and compression pressure in the cylinders.We see this on our blower engine frequently.Sometimes the rods will kick to the crank and also show radius marking. Thank you!I did not think I was the only 1 seeing this. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: MR_P_BODY] #1543749 12/05/13 01:36 PM 12/05/13 01:36 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Quote: Quote: Quote: I wont say anything till I see the others... but the one edge looks like it doesnt have the radius for the crank or enough radius for it The radius on the bearings were turned down to clear the crank.[SLP-8-7135ch .010] I will try to do 2 more rods on another crank throw. Did you verify that they clear the fillet... put a slight side pressure on the rod and use a feeler gauge between the crank and rod... I had to cut the bearings on a couple of my engines and at first I thought I had it till I checked it with the feeler gauge and had to go back and add more What is the feeler gauge for,to space the rod evenly?When I put the engine together I did check to see if the rod was stickey when moved to the radius. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: B G Racing] #1543750 12/05/13 01:37 PM 12/05/13 01:37 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: Typical of an engine that is constantly being loaded and unloaded by RPM and torque loads and compression pressure in the cylinders.We see this on our blower engine frequently.Sometimes the rods will kick to the crank and also show radius marking. Hmmm? Unfortunately, didn't save any bearings for comparative pics, but ran Clevite #CB-481-HN's in my blown small block with twice the runs as the OP's and they didn't look like that. All runs were with boost in the 15 - 18 lb range and a few passes pinned a 25 lb boost gauge ( smaller blower pulley). Bearings had enough radius out of the box to fit a factory Scat crank. I to your experience on the subject though. Fastest 300

Re: Rod bearing pic [Re: Crizila] #1543751 12/05/13 02:49 PM 12/05/13 02:49 PM
Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A. roadhazard master
roadhazard master Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A.	Don't know if this helps anyone out so just throwing it out there. There are multiple images for some of these pictures. http://catalog.mahleclevite.com/bearing/

Re: Rod bearing pic [Re: roadhazard] #1543752 12/05/13 03:23 PM 12/05/13 03:23 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: Don't know if this helps anyone out so just throwing it out there. There are multiple images for some of these pictures. http://catalog.mahleclevite.com/bearing/ Good post . Look at image #1 under "crankshaft flex". Pretty close to the OP's pic. #22 = poor journal surface. Maybe a different bearing ( blower application ?) would help? Last edited by Crizila; 12/05/13 03:25 PM. Fastest 300

Re: Rod bearing pic [Re: roadhazard] #1543753 12/05/13 03:27 PM 12/05/13 03:27 PM
Joined: Oct 2006 Posts: 596 Mass. 8 80fbody mopar
80fbody mopar 8 Joined: Oct 2006 Posts: 596 Mass.	Quote: Don't know if this helps anyone out so just throwing it out there. There are multiple images for some of these pictures. http://catalog.mahleclevite.com/bearing/ That's a cool link for sure. Looks kind of like #24.

Re: Rod bearing pic [Re: 80fbody] #1543754 12/05/13 04:31 PM 12/05/13 04:31 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Here is rod 5 and the other was #1,both having markings on the chamfer side of the cap. 7948151-rod5.jpg (73 downloads) GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543755 12/05/13 04:48 PM 12/05/13 04:48 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Typical,don't idle the engine too low. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Rod bearing pic [Re: B G Racing] #1543756 12/05/13 04:56 PM 12/05/13 04:56 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Quote: Typical,don't idle the engine too low. The idle is 1100+ and 1k in gear. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: Rod bearing pic [Re: Clanton] #1543757 12/05/13 05:12 PM 12/05/13 05:12 PM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Quote: Quote: Typical,don't idle the engine too low. The idle is 1100+ and 1k in gear. You like to hear that rump,rump [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Rod bearing pic [Re: B G Racing] #1543758 12/05/13 05:32 PM 12/05/13 05:32 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Quote: Quote: Quote: Typical,don't idle the engine too low. The idle is 1100+ and 1k in gear. You like to hear that rump,rump I don't mind at all. and thank you for your help. Last edited by Clanton; 12/05/13 05:35 PM. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

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