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Re: What happened to this bearing [Re: mopster] #180342 01/01/09 05:15 PM 01/01/09 05:15 PM
Joined: Jan 2003 Posts: 1,072 The Sunny Shuswap D dodgefarmer super stock
dodgefarmer super stock D Joined: Jan 2003 Posts: 1,072 The Sunny Shuswap	Quote: After about 600 street miles the oil looks really bad and it has lost most of its viscosity. Oil used is valvoline VR1 20W/50. Oil pressure drops to 55 psi from normal 65 psi I hav'nt used Valvoline 20W/50 since 1977 for that very reason. That being said I would suggest that you get an oil sample analyzed (like I should have done) . Looking back I believe that I probably had severe fuel contamination but I'll never know for sure. Randy

Re: What happened to this bearing #180343 01/02/09 10:12 AM 01/02/09 10:12 AM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	Quote: please post good clear pictures of the front and back of a pair of rod bearings and main bearings. it's hard to tell what the problem is when it's only being described by someone. pictures ar worth 1000 words. Here we go. 4917442-mains.JPG (95 downloads)

Re: What happened to this bearing [Re: mopster] #180344 01/02/09 10:14 AM 01/02/09 10:14 AM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	2. 4917447-mains2.JPG (86 downloads)

Re: What happened to this bearing [Re: mopster] #180345 01/02/09 10:15 AM 01/02/09 10:15 AM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	Rod bearings 4917450-rods.JPG (95 downloads)

Re: What happened to this bearing [Re: mopster] #180346 01/02/09 10:29 AM 01/02/09 10:29 AM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	4. 4917468-rods2.JPG (78 downloads)

Re: What happened to this bearing [Re: mopster] #180347 01/02/09 10:47 AM 01/02/09 10:47 AM
Joined: Nov 2003 Posts: 2,715 closer to Canadian beer! torkrules I'm neurotic
torkrules I'm neurotic Joined: Nov 2003 Posts: 2,715 closer to Canadian beer!	Quote: 4. Is there any spring left in the bearing (so they fall right into the saddles or do you have to push them in). If the spring is gone it would indicate an overload/detonation. Look at the cap mating surface. Does it look like there has been metal transfer? Another indicator of overload/detonation. How does the crank look (scratches, etc). Could some particles have gotten in the oil? I would suppose with a chevy oil pump that it could be possible that the pump is cavitating/overheating the oil on bypass. You could try using a thinner oil (10/40 or 10/30) If the clearances are tight the above 2 oils should be fine.

Re: What happened to this bearing [Re: torkrules] #180348 01/02/09 01:28 PM 01/02/09 01:28 PM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	Spring is still there. They may look very bad in the picture, but they are not hammered or wiped out of shape, even the clearances are still like they were new. Only the topmost flash tin layer seems to be boiled or baked or whatever. There are some minor scratches in some of the journals, but polishing is all that needs to be done there.

Re: What happened to this bearing [Re: mopster] #180349 01/02/09 02:04 PM 01/02/09 02:04 PM
A Anonymous Unregistered
Anonymous Unregistered A	Are those std. size bearings or are the bigger?Next what does the crank look like? any ridges burrs around the oiling holes. Have you mic-ed the crank? Check for taper and roundness... Something is definitly heating up the bearings... 4917909-00popprofile.jpg (72 downloads)

Re: What happened to this bearing [Re: mopster] #180350 01/02/09 02:10 PM 01/02/09 02:10 PM
Joined: Jan 2003 Posts: 1,379 Houston,Tx. L Lee446 pro stock
Lee446 pro stock L Joined: Jan 2003 Posts: 1,379 Houston,Tx.	This may sound very basic, but, what is the capacity of the oil pan? I was rebuilding my Chevy truck 350, and as a matter of course, I told the machine shop to get me a high volume pump. My machine shop builds lots of Chevy's for dirt track and drags, and the engine builder advised me not to use one with the stock 5 qt. pan as it would suck it dry at higher rpm. I have never had that problem with my Mopars, but they are all BB with at least a 6 qt. pan.

Re: What happened to this bearing [Re: Lee446] #180351 01/02/09 03:11 PM 01/02/09 03:11 PM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	Std. bearings. 8qt. oilpan, completely new engine with all the parts new including the block, rounded oil holes in crank. 1200 street miles and a few races behind this far. One thing we thought that might cause problems with the HV pump is that sbc engine has bypass also for the oil filter, and some oil may have been passing the filter and the cooler. I believe the oil filter bypass is there for winter usage mainly, and we thought it should be blocked.

Re: What happened to this bearing [Re: mopster] #180352 01/02/09 04:01 PM 01/02/09 04:01 PM
A Anonymous Unregistered
Anonymous Unregistered A	I still think something else is going on.SBC motors have a pretty good oiling system. The returns to the pan are good..How did the filter look? Have you cut it open? I have seen problems leading to galling of bearings due to a clog in : a filter or filter mounting pickup..just a thought..

Re: What happened to this bearing #180353 01/02/09 04:27 PM 01/02/09 04:27 PM
Joined: Nov 2003 Posts: 3,060 Western New York sixpackbee master
sixpackbee master Joined: Nov 2003 Posts: 3,060 Western New York	Excessive acids in the oil can cause the pocking evident in some of the photos. When the oil was drained what was its condition? 1959 Bugeye Sprite 1967 Charger Black L code 1967 Coronet R/T Convert Green 440 auto bought from original owner 1968 Charger R/T Bronze 440 4 spd console AM/FM 1969 Super Bee WM21H B5 A40 D21 N96 1969 Barracuda Formula S 340 Convert pilot car 1969 Hemi Road Runner RM23J D32 Omaha orange 4.10 Dana N96 N85 1970 Super Bee WM23N FE5 V1X 3.91 axle package, N96 1970 Road Runner RM21N B3 V1X D13 1971 MG Midget 1971 Road Runner RM23H GW3, A57 1972 Road Runner RM23P FY1, D21

Re: What happened to this bearing [Re: sixpackbee] #180354 01/02/09 04:39 PM 01/02/09 04:39 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: Excessive acids in the oil can cause the pocking evident in some of the photos. When the oil was drained what was its condition? mostly in part that contamination,acids,fuel,antifreeze can and will cause the pocking and unraveling but the rods don't show much evidence.How tight was the main bearing clearence?Was there excessive end play?What about the line bore or crank run out?It's hard to tell from the pictures.Just my thoughts as to some of the maybe causes. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: What happened to this bearing #180355 01/02/09 06:13 PM 01/02/09 06:13 PM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	Quote: I still think something else is going on.SBC motors have a pretty good oiling system. The returns to the pan are good..How did the filter look? Have you cut it open? I have seen problems leading to galling of bearings due to a clog in : a filter or filter mounting pickup..just a thought.. You may be right, a lot of sbc engines are built with HV oil pumps and this isn�t a usual outcome. Filter is cut open and there was some minor particles in it, probably from the bearings, but it wasn�t clogged or anything.

Re: What happened to this bearing [Re: B G Racing] #180356 01/02/09 06:41 PM 01/02/09 06:41 PM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	Quote: Quote: Excessive acids in the oil can cause the pocking evident in some of the photos. When the oil was drained what was its condition? mostly in part that contamination,acids,fuel,antifreeze can and will cause the pocking and unraveling but the rods don't show much evidence.How tight was the main bearing clearence?Was there excessive end play? What about the line bore or crank run out?It's hard to tell from the pictures.Just my thoughts as to some of the maybe causes. Main bearing clearance .003" and rods .0025". This possibility of contamination is interresting, but should it show in rods as well as in mains? How about the brown colour, could contamination cause it, I thought that it must be heat causing it?

Re: What happened to this bearing [Re: mopster] #180357 01/02/09 10:37 PM 01/02/09 10:37 PM
Joined: Nov 2003 Posts: 3,060 Western New York sixpackbee master
sixpackbee master Joined: Nov 2003 Posts: 3,060 Western New York	Certain contaminants can cause lubricity problems. If the friction modifiers get compromised then excessive heat usually results. The pock marks can be caused by acids ect. which in turn lead to greater friction coefficients which lead over heated parts. It could be a situation of one thing causing two different appearances on the bearings for two different reasons. Was an oil change, brand change, performed recently? There are some oils that do not play well with others and can cause problems. 1959 Bugeye Sprite 1967 Charger Black L code 1967 Coronet R/T Convert Green 440 auto bought from original owner 1968 Charger R/T Bronze 440 4 spd console AM/FM 1969 Super Bee WM21H B5 A40 D21 N96 1969 Barracuda Formula S 340 Convert pilot car 1969 Hemi Road Runner RM23J D32 Omaha orange 4.10 Dana N96 N85 1970 Super Bee WM23N FE5 V1X 3.91 axle package, N96 1970 Road Runner RM21N B3 V1X D13 1971 MG Midget 1971 Road Runner RM23H GW3, A57 1972 Road Runner RM23P FY1, D21

Re: What happened to this bearing [Re: sixpackbee] #180358 01/03/09 04:49 AM 01/03/09 04:49 AM
Joined: Dec 2004 Posts: 128 Finland M mopster OP member
mopster OP member M Joined: Dec 2004 Posts: 128 Finland	The car was driven a few hundred miles with faulty powervalve. It was stuck open and consumed about 1/3 more fuel than usually. Could this contaminate oil badly enough to cause bearing failure?

Re: What happened to this bearing [Re: mopster] #180359 01/03/09 05:07 AM 01/03/09 05:07 AM
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: The car was driven a few hundred miles with faulty powervalve. It was stuck open and consumed about 1/3 more fuel than usually. Could this contaminate oil badly enough to cause bearing failure?

Re: What happened to this bearing [Re: mopster] #180360 01/03/09 05:08 AM 01/03/09 05:08 AM
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: The car was driven a few hundred miles with faulty powervalve. It was stuck open and consumed about 1/3 more fuel than usually. Could this contaminate oil badly enough to cause bearing failure? That info helps,and as Sixpakbee stated,something effected the lubricity of the oil.In this case more likely gas.The reason it is more prevalent on the mains is that the crank takes more constant loading and unloading as well as thrusting where as the rods more or less float on the crank journal and only recieve a load during compression strokes which is minimized and helped by the opposing piston and rod. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: What happened to this bearing [Re: mopster] #180361 01/03/09 11:46 AM 01/03/09 11:46 AM
Joined: Nov 2003 Posts: 2,715 closer to Canadian beer! torkrules I'm neurotic
torkrules I'm neurotic Joined: Nov 2003 Posts: 2,715 closer to Canadian beer!	Quote: The car was driven a few hundred miles with faulty powervalve. It was stuck open and consumed about 1/3 more fuel than usually. Could this contaminate oil badly enough to cause bearing failure? That could cause some bog problems. How do the cylinders/rings look? This usually gas washes the cylinders.

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