Add Tip Ask Question Comment Download. Remove the old bearing. Place the crankshaft gently and squarely onto the main bearings. If so, remove the seals to match your original bearing and wash the grease out with solvent. Main bearing sleeves come in two half-moon sections, one that sits inside the main bearing cap and one that sits in the engine block. Then re oil the bearing with 2 stroke oil. TandemJeremy. An Easier Way To Remove Mounted Bearings. The process of removing the crankshaft and replacing the main bearings is very similar to that of the connecting rods and rod bearings. Yes. Main bearings can wear with normal age, or become pitted and galled with insufficient lubrication. Be sure to rotate the crankshaft in the proper direction to raise the bearing's lock out of the notch in the cylinder block. Rear Main Bearing Seal. If you see a number, this means that the journal has been cut. The main bearings have oil holes that lubricate the journal. Insert the bearing removal tool into the journal's oil hole and rotate the crankshaft, causing the bearing shell to rotate within the journal and allowing access to the upper bearing half. I used a dental tool to remove the rubber seals from the bearing. 12. Babbitt bearings are solid and must be melted off with an oxy-acetylene torch, available at hardware and building supply stores. 14. Free Member. The general era of engine applications that used babbitted bearings … Open the bearing case and melt off the old bearing, making sure you melt the retaining grooves and holes, as well. If the bearing is an aftermarket bearing it may be pre greased and may have grease seals on the bearing. Install main caps in proper position. If you’ve tried any variation of these methods and are looking for an easier way, Regal offers a bearing removal solution that requires no “method” at all━the Sealmaster® TIME SAVING™ Performance Ball Bearing.It has patented axial grooves that extend the entire length of the inner ring bore at setscrew locations. 13. After removal of the engine sump/oil pan, main bearing caps should be removed one at a time. If there is no c-clip, then just skip this step. Re: Upper crankshaft Bearing removal use two stroke oil. If you have a steel bearing cap (see image #3), then look for a little c-clip in the side of the bearing case. If the upper main bearing shell cannot be rotated for removal, after removal of the bearing cap, one method is via the aid of a split pin. Posted 9 years ago. If the number is .010, a bearing that is .010 oversized is needed. Look at the bottom side for STD stamped into the bearing or a number, such as .010. Babbitt (or white metal) work is the method of removing and replacing worn bearing material from main bearings, connecting rods, and some cam bearings on vintage engines. Always, use a good supply of lubricant, on all bearing surfaces and seal lip. The crank can now be hoisted from the engine block and the upper main bearings removed from their saddles. The crankshaft journal spins within the two. Heat is … All threads must be clean and lightly lubricated, to obtain accurate torque readings. I had a bearing collapse mid-removal from a Nomad, but the outer race tapped out with a screwdriver with no problem. Underneath the rear cap you will find both the rear main oil seal and the crankshaft thrust bearing. The STD means that the crank is original size and has not been turned. Remove the bearing from the connecting rod cap and turn it over. Step 3: Cleaning the Bearings. Size and has not been turned been cut look at the bottom side for STD stamped into bearing! 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