Remove/install crankshaft · ar0320p4351l · Mercedes-Benz WIS

AR03.20-P-4351L

Remove/install crankshaft

06.03.2020

Engine

137.970

Modification notes

16.05.2018	Document completely revised.
16.05.2018	BA03.10-P-1001-01E replaced by BA03.10-P-1001-01J.	Operation steps 41, 43	AR03.10-P-6111-06L
24.05.2018	BA03.10-P-1001-01E replaced by BA03.10-P-1001-01J.	Operation step 42	AR03.10-P-6111-02L

P03.20-2095-09

1	Lower crankcase section	5/1	Upper thrust plates (axial bearing)	7	Bolt (M10)
2	Crankshaft	5/2	Lower thrust plates (axial bearing)	8	Screw/bolt (M8)
3	Upper crankcase section	6	Lower crankshaft bearing shells (no oil hole)	9	Bolt (M6)
4	Upper crankshaft bearing shells (with oil hole)

 Warning	Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
 Caution	Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-0001-01A
 Caution	Risk of injury caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Topical note	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove
1	Remove engine.		AR01.10-P-2400L
2	Remove end cover.		AR01.40-P-8913L
3	Mount the engine on the assembly stand with the engine crane.
	000 588 00 31 00 Assembly stand for cars		WS01.00-N-3028B
		 Commercially available devices/tools Engine crane
4	Remove the engine crane from the engine.	 Commercially available devices/tools Engine crane
5	Remove the timing case cover.		AR01.40-P-8000L
6	Remove oil pan.		AR01.45-P-7500L
7	Remove the oil deflector.
8	Remove oil pump.		AR18.10-P-6020L
9	Unscrew the bolts (7, 8, 9) in reverse order of the tightening procedure.	Tightening procedure for crankcase bottom section	AR03.20-P-4351-05L
10	Remove the lower crankcase section (1).	 Note the dowel pins when prying off.
		If the lower crankcase section (1) cannot be pried off,
		
		remove the dowel pins.
		 Threaded bolt	*116589013400
		 Impact extractor	*116589203300
11	Mark the lower crankshaft bearing shells (6) relative to the relevant place in the lower crankcase section (1).	Only when the lower crankshaft bearing shells(6) are reused.
12	Mark the lower thrust plates (5/2) relative to the relevant place in the lower crankcase section (1).	Only when the lower thrust plates (5/2) are reused.
13	Remove the lower crankshaft bearing shells (6) and lower thrust plates (5/2) from the lower crankcase section (1).
14	Mark the installation position on the connecting rod bearing caps and connecting rods.	 Do not mix up the connecting rod bearing caps. Engine damage can occur otherwise.
15	Remove the connecting rod bolts and connecting rod bearing cap.	 The connecting rods and the connecting rod bearing caps are cracked (broken). Do not mix up the connecting rods. Engine damage can occur otherwise.
		 When turning the crankshaft (2), make sure that the connecting rods do not cant. Crankshaft (2) and connecting rod will otherwise be damaged.
16	Mark the connecting rod bearing shells relative to the associated connecting rod and connecting rod bearing cap.	Only when the connecting rod bearing shells are reused.
		 Do not mix up the connecting rod bearing shells. Engine damage can occur otherwise.
17	Remove the crankshaft (2) from the upper crankcase section (3).
18	Remove the connecting rod bearing shells.
19	Mark the upper crankshaft bearing shells (4) relative to the relevant place in the upper crankcase section (3).	Only when the upper crankshaft bearing shells (4) are reused.
20	Mark the upper thrust plates (5/1) relative to the relevant place in the upper crankcase section (3).	Only when the upper thrust plates (5/1) are reused.
21	Remove the upper crankshaft bearing shells (4) and upper thrust plates(5/1) from the upper crankcase section (3).
22	Clean all parts of the crank assembly.	 The parts of the crank assembly must be absolutely free of soiling. Engine damage can occur otherwise.
		Assembly cleaner	*BR00.45-Z-1028-04A
	Check
23	Measure the crankshaft (2) and store if necessary.		AR03.20-P-4355L
24	Check the lower crankshaft bearing shells (6), upper crankshaft bearing shells (4), lower thrust plates (5/2), upper thrust plates (5/1) and the crankshaft bearing journals for wear and damage.
	Information on assessing wear of main bearings and main bearing journals		AH03.20-P-1000-02MM
		If problems occur,
		
		Replace the lower crankshaft bearing shells (6), upper crankshaft bearing shells (4), lower thrust plates (5/2), upper thrust plates (5/1) and the crankshaft (2).
25	Check the connecting rod bearing shells and connecting rod journals for wear and damage.
	Notes on assessing wear on connecting rod bearings and connecting rod journals		AH03.10-P-0001-03MM
		If problems occur,
		
		Replace the connecting rod bearing shells / crankshaft (2).
26	Check the remaining power unit components for wear and damage.	If problems occur,
		
		Replace corresponding power unit components.
27	Check the connecting rod bolts and replace if necessary.		AR03.10-P-6111-01L
		Connecting rod bolts	*BE03.10-P-1001-03A
	Install
28	Assign new upper crankshaft bearing shells(4) and new lower crankshaft bearing shells (6).	Only when the upper crankshaft bearing shells(4) and lower crankshaft bearing shells (6) are replaced.
			AR03.20-P-4360-01L
		Main bearing shells standard size for upper crankcase section and crankcase bottom section main bearing bore Ø 68.5 mm	*BE03.20-P-1001-03E
		Main bearing shells standard size for upper crankcase section and crankcase bottom section main bearing bore Ø 68.5 mm	*BE03.20-P-1002-03E
		Main bearing shells standard size for upper crankcase section and crankcase bottom section main bearing bore Ø 68.5 mm	*BE03.20-P-1003-03E
		Main bearing shells standard size for bottom part of crankcase main bearing bore Ø 68.5 mm	*BE03.20-P-1004-03E
		Main bearing shells standard size for bottom part of crankcase main bearing bore Ø 68.5 mm	*BE03.20-P-1005-03E
29	Lubricate the upper crankshaft bearing shells (4) and upper thrust plates (5/1) with engine oil.
	Specified engine oils (service) - Overview		BB00.40-P-0223-02A
30.1	Install new upper crankshaft bearing shells (4) and new upper thrust plates (5/1) in the upper crankcase section (3).	Only when the upper crankshaft bearing shells(4) and upper thrust plates (5/1) are replaced.
		 Oil grooves in the upper thrust plates (5/1) must point toward the collar of the crankshaft (2). The upper thrust plates (5/1) each have a retaining lug as an anti-twist lock.
30.2	Install the marked upper crankshaft bearing shells (4) and marked upper thrust plates (5/1) at the marked position in the upper crankcase section (3).	Only when the upper crankshaft bearing shells (4) and upper thrust plates (5/1) are reused.
		 Note markings to restore the correct installation position. Engine damage can occur otherwise.
		 Oil grooves in the upper thrust plates (5/1) must point toward the collar of the crankshaft (2). The upper thrust plates (5/1) each have a retaining lug as an anti-twist lock.
31	Lubricate the crankshaft bearing journals and connecting rod journals with engine oil.
	Specified engine oils (service) - Overview		BB00.40-P-0223-02A
32	Position the crankshaft (2) in the upper crankcase section (3).
33	Lubricate the lower crankshaft bearing shells (6) and lower thrust plates (5/2) with engine oil.
	Specified engine oils (service) - Overview		BB00.40-P-0223-02A
34.1	Install new upper crankshaft bearing shells (6) and new lower thrust plates (5/2) in the lower crankcase section (1).	Only when the lower crankshaft bearing shells (6) and lower thrust plates (5/2) are replaced.
34.2	Install the marked lower crankshaft bearing shells (6) and marked lower thrust plates (5/2) at the marked position in the lower crankcase section (1).	Only when the lower crankshaft bearing shells (6) and lower thrust plates (5/2) are reused.
		 Note markings to restore the correct installation position. Engine damage can occur otherwise.
35	Clean the sealing surfaces on the lower crankcase section (1) and upper crankcase section (3).		AR01.00-P-0050-01A
		 Do not use any sharp-edged tools or abrasive paper. The sealing surfaces might otherwise be damaged.
		Loctite 7200	*BR00.45-Z-1038-04A
		Loctite 7063 (400 ml) cleaning spray	*BR00.45-Z-1046-04A
36	Place the lower crankcase section (1) on the upper crankcase section (3).
	Information on application of sealant to crankcase bottom section		AH01.40-P-1000-03TJ
		Sealant, Loctite 5970, 50 ml	*BR00.45-Z-1013-01A
		 Application gun	*112589002500
37	Lubricate the bolt heads (7, 8, 9) with engine oil.
	Specified engine oils (service) - Overview		BB00.40-P-0223-02A
38	Screw the bolts (7, 8, 9) into the lower crankcase section (1).	Tightening procedure for crankcase bottom section	AR03.20-P-4351-05L
		 Screw/bolt, lower crankcase section to upper section	*BA01.40-P-1008-01C
39	Rotate the crankshaft (2) and check that it can move unobstructed.	If the crankshaft(2) is excessively resistant or becomes stuck,
		
		Check correct use and sit of the upper crankshaft bearing shells(4) and lower crankshaft bearing shells (6).
			AR03.20-P-4360-01L
		Main bearing shells standard size for upper crankcase section and crankcase bottom section main bearing bore Ø 68.5 mm	*BE03.20-P-1001-03E
		Main bearing shells standard size for upper crankcase section and crankcase bottom section main bearing bore Ø 68.5 mm	*BE03.20-P-1002-03E
		Main bearing shells standard size for upper crankcase section and crankcase bottom section main bearing bore Ø 68.5 mm	*BE03.20-P-1003-03E
		Main bearing shells standard size for bottom part of crankcase main bearing bore Ø 68.5 mm	*BE03.20-P-1004-03E
		Main bearing shells standard size for bottom part of crankcase main bearing bore Ø 68.5 mm	*BE03.20-P-1005-03E
40	Lubricate the connecting rod bearing shells with engine oil.
	Specified engine oils (service) - Overview		BB00.40-P-0223-02A
41	Install the connecting rod bearing shells and check the connecting rod bearing play.		AR03.10-P-6111-06L
		Connecting rod bearing play	*BE03.20-P-1002-04E
		 Screw/bolt, connecting rod bearing cap to connecting rod	*BA03.10-P-1001-01J
42	Tighten the connecting rod bolts.		AR03.10-P-6111-02L
	Specified engine oils (service) - Overview		BB00.40-P-0223-02A
		 Screw/bolt, connecting rod bearing cap to connecting rod	*BA03.10-P-1001-01J
43	Rotate the crankshaft (2) and check that it can move unobstructed.	If the crankshaft(2) is excessively resistant or becomes stuck,
		
		Check for correct use and seating of the connecting rod bearing shells.
			AR03.10-P-6111-06L
		Connecting rod bearing play	*BE03.20-P-1002-04E
		 Screw/bolt, connecting rod bearing cap to connecting rod	*BA03.10-P-1001-01J
44	Install oil pump.		AR18.10-P-6020L
45	Install the oil deflector.	 Screw/bolt, oil baffle to lower crankcase section	*BA01.40-P-1009-01C
46	Install oil pan.		AR01.45-P-7500L
47	Install the timing case cover.		AR01.40-P-8000L
48	Attach the engine crane to the engine.	 Commercially available devices/tools Engine crane
49	Remove the engine from the assembly stand.
	000 588 00 31 00 Assembly stand for cars		WS01.00-N-3028B
50	Install the end cover.		AR01.40-P-8913L
51	Install engine.		AR01.10-P-2400L

Check values for connecting rod bolt

Number	Designation				Engine 137, 260, 270, 271, 274, 275, 285
BE03.10-P-1001-03A	Connecting rod bolts	Thread diameter		M	71
		Shank length	When new	mm	38
			max.	mm	38,4