be0310b100005e

Check values for piston rings

Type be · topic 03.10 · version 0101 · 2020-02-11

Applies to: Engine 372.9 Engine 374.9 Engine 376.9 Engine 377.9 Engine 386.9

Where it sits

Function group 1 Engine › 03 Crank assembly › 03.10 Connecting rods, pistons — Series 372 (models 9**) · Series 374 (models 9**) · Series 376 (models 9**) · Series 386 (models 9**)

EinPAS 15 Engine › 15.15 Combustion engine, complete/engine housing/crank assembly › 15.15.40 Connecting rod/piston — Series 372 (models 9**) · Series 374 (models 9**) · Series 376 (models 9**) · Series 386 (models 9**)

Also applies to engines/gearboxes: 377 9**

BE03.10-B-1000-05E

Check values for piston rings

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Engine	372.9
Engine	374.9
Engine	376.9
Engine	377.9
Engine	386.9

Test values of the piston rings

Number	Designation				Engine 372.9, 374.9, 376.9 (except gas engine), 377.9, 386.9	Engine 376.919/922/926
BE03.10-B-1002-05E	Clearance between the piston ring points	groove ring I	new	mm	0,20...0,35	0,20...0,40
			wear limit	mm	1,1	1,1
			Wear limit for turbo engine	mm	1,4	1,4
		groove ring II	new	mm	0,20...0,35	0,30...0,50
			wear limit	mm	0,9	0,9
		groove ring III	new	mm	0,25...0,40	0,26...1,02
			wear limit	mm	0,8	-
BE03.10-B-1003-05E	Groove play	compression groove ring II		mm	0,060...0,095	0,060...0,095
		oil baffle groove ring III		mm	0,030...0,065	-
BE03.10-B-1004-05E	Ring thickness	Groove I trapezoidal ring		mm	2,5	2,5
		Groove II compression ring		mm	2,475...2,490	2,475...2,490
		Groove III oil scrapper ring	Spring	mm	3,975...3,990	3,696...3,823
			Scraper	mm	-	0,63...0,66