engine bearing info

[grumpyvette]

take the time and effort to read thru the links if your interested in knowning a bit more about bearings

http://www.thirskauto.net/BearingPics.html

http://www.babcox.com/editorial/ar/ar20128.htm

http://www.babcox.com/editorial/cm/cm99828.htm

http://www.thirskauto.net/Engine_Thrust_Bearings.html

http://www.aptfast.com/Flyer_HowTo_Dir/HowTo_Folder/Cam_Bearing_Install/Install_Cambearings.htm

http://www.babcox.com/editorial/us/us90126.htm

http://www.circletrack.com/tipstricks/4636_crankshaft_rod_bearing_installation_tips/index.html

http://www.stockcarracing.com/techarticles/scrp_0509_coated_bearings/index.html

http://www.engineparts.com/motorhead/techstuff/brgclear.html

http://www.engineparts.com/motorhead/techstuff/bearingfailures.htm

http://www.engineparts.com/motorhead/techstuff/clrcode.html

http://www.babcox.com/editorial/ar/ar10180.htm

http://www.popularhotrodding.com/tech/0711phr_bearing_clearance_control/index.html

http://www.tpub.com/content/engine/14076/css/14076_73.htm

http://mahleclevite.com/techbulletins/CL77-1-205R.pdf

http://www.chevyhiperformance.com/t...rain/0707ch_main_bearing_clearance/index.html

BTW beariing shells rarely fit the block EXACTLY ,its comon, for the bearing shells to need TWEAKING/FITTING to the application, a differant brand of bearing MIGHT fit/line up better but its not a big deal or unknown, use a dremel tool to teardrop, and SMOOTH/RADIAS the block port to a depth of about 3/16" -1/4" so as too match the bearing shell opening which can, and should also be opened slightly where it blocks part of the port ,with part of the bearing shell ,if your careful to further open access to the port in the block too allow full oil flow to the bearing shells oil port opening.
DON,T forget to totally clean up any chips or grinding dust and wash the area till its clean with solvent, little things like that are why its called ENGINE BUILDING vs ASSEMBLING engine PARTS and why EXPERIANCE COUNTS.
BTW avoid the urge to just use a big drill bit to open up the block as it COULD cause stress points in the block that WON,T show untill the blocks under stress
remember the upper bearing has far less stress that the lower bearing shell, but it needs to maintain the oil wedge , pressure and flow rates supporting the cranks main journals.

ITS comon to need to open that feed port, BUT its best to smooth the block feed port and the bearing feed port to maximize the flow

heres a MINIMALLY TEARDROPPED PORT enterance

thats the idea! but the TEARDROP being ground into the port exit should be DEEPER to ease flow restriction, and any part of the bearing shell that overlaps the port exit needs to be removed and smoothed

http://www.circletrack.com/tipstricks/4 ... index.html

http://www.circletrack.com/howto/1815_c ... index.html

http://www.babcox.com/editorial/us/us90126.htm

http://engineparts.com/Motorhead/techst ... stall.html