Piston, Crankshaft and Main Bearings Replacement - BMW N55 Engine Rebuild Project Part 2

BMW N55 Engine Rebuild Tools: https://amzn.to/3uHUwh5 Parts: https://amzn.to/37W6GsS

Part 3:    • BMW Rod Bearing Replacement - BMW N55...  

After getting all of the parts necessary, I finally got to working on the BMW N55 engine rebuild! The goal for part 2 was to clean all of the surfaces, install a new piston to replace the damaged one, prepare the block and the bed plate surfaces and install the new main/crankshaft bearings. Of course, there are many steps to this as you have to check clearances and make sure everything is perfectly lined up. After the bearings were installed, I test fitted the crankshaft in the engine with Plastigauge on all of the journal, torqued the crankshaft bolts and then took it back apart. Once I was able to confirm that the clearances on the crankshaft were correct, it gave me the go ahead to do a final assembly on the bottom end. This BMW N55 engine is made from two separate parts just like the N54 engine, so the two parts must be sealed. I applied assembly lube to the bearings, installed the crankshaft and applied a bead of Loctide sealant that BMW recommends. Then I installed the bedplate for the last time! Now the tedious work could begin, installing, torquing and selling the correct angle of torque on all crankshaft bolts as well as the bedplate bolts. Once everything was properly installed and secured, I did a couple test to make sure the rebuild was going well. I tested the rotational drag on the crankshaft as well as determined crankshaft axial clearance.

BMW N55 Engine Rebuild Project Playlist:    • BMW N55 Engine Rebuild  
BMW 335i Playlist:    • BMW 335i Coupe  
N55 Running with chunks of metal:    • BMW N55 Engine Knocking  
00:00 Intro
00:49 Cleaning Engine
01:33 Piston Install
03:59 Mating Surface Cleaning
04:27 Removing Connecting Rod Caps
05:01 Removing Crankshaft
05:48 Installing Main Bearings
08:10 Test Installing Crankshaft
09:00 Measuring bearing clearance
12:54 Final Assembly
13:39 Bedplate Sealing
15:58 Crankshaft Bolts
19:23 Bedplate Bolts
23:25 Crankshaft Coaxial Clearance Check
24:29 Coefficient of Friction on the Crankshaft

BMW N55 Engine Rebuild Project:
Part 1:    • I Bought A Broken BMW N55 - BMW N55 E...  
Part 2:    • Piston, Crankshaft and Main Bearings ...  
Part 3:    • BMW Rod Bearing Replacement - BMW N55...  
Part 4:    • Cylinder Head Gasket Replacement - BM...  
Part 5:    • Timing Chain and Oil Pump Replacement...  
Part 6:    • Valve Cover Gasket & Oil Pan Gasket -...  
Part 7:    • BMW N55 Injector Install and Teflon R...  
Part 8:    • Front Crankshaft Seal DIY (No Special...  
Part 9:    • Engine Install and Assembly - BMW N55...  

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