Checking, removing and installing valve guides - AR05.30-P-3731AO: Notes

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ENGINE 120

valve guide

Bright metal version (1st version) with circlip

Fig 1: Identifying Valve Guide With Circlip

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

valve guide

centered metal version (2nd version) without circlip

Fig 2: Identifying Valve Guide Without Circlip

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

MODIFICATION NOTES

17.2.00

Figure modified from 10.2...10.4 mm to 8.2...8.6 mm

Figure in line BE05.30-P-1007-02B (dimension "c") engine 120 1st version modified

*BE05.30-P-1007-02B

	Remove, Install
1	Remove cylinder head		ra01001204150x
2	Remove valves		AR05.30-P-3500AO
3	Knock out valve guide (54)	The valve guides (54) of the exhaust side and inlet side are identical for the 2nd version	AR05.30-P-3731-01AO
			Figure
			Figure
4	Measure valve guide outer Ø	Use a micrometer to measure, note which valve guide was installed, install next larger valve guide corresponding to valve guide installed.	*BE05.30-P-1002-02B
			*WH58.30-Z-1002-12A
		Standard size valve guides are not supplied as replacement parts as the overlap would not be sufficient if they are reinstalled. For this purpose ↓
			*BE05.30-P-1002-02B
		ream basic bore to standard size I	AR05.30-P-3731-02AO
			*BE05.30-P-1001-02B
			Figure
			Figure
		or ↓ Broaching basic bore to repair size I	AR05.30-P-3731-04AO
			*BE05.30-P-1001-02B
			Figure
			Figure
			Figure
			Figure
5	Insert valve guide, inspect		AR05.30-P-3731-03AO
			*BE05.30-P-1003-02B
			*BE05.30-P-1004-02B
			*BE05.30-P-1005-02B
			*BE05.30-P-1006-02B
			*BE05.30-P-1007-02B
			Figure
			Figure
			Figure
			Figure
			Figure
			Figure
6	Examine roundness of valve seat machine if necessary		ra05001202910x
7	Install in the reverse order

TEST VALUES FOR VALVE GUIDES

Number	Designation				Engine 120 bright metal valve guide (1st version)	Engine 120 centered metal valve guide (2nd version)
BE05.30-P-1001-02B	Valve guide basic bore in cylinder head	Standard size		mm	13,5...13,51	12,5...12,51
		Standard size I		mm	13,53	12,53
		Repair size I		mm	13,70	12,70
BE05.30-P-1002-02B	Valve guide outer Ø	Standard size		mm	13,54...13,55	12,54...12,55
		Standard size I (color: greyish-brown)		mm	13,56...13,57	-
		Standard size I (color: gray)		mm	-	12,56...12,57
		Repair size I (color: red)		mm	13,74...13,75	12,74...12,75
BE05.30-P-1003-02B	Valve guide inner Ø	Inlet valve guide		mm	7,000...7,015	7,000...7,015
BE05.30-P-1003-02B	Valve guide inner Ø	Exhaust valve guide		mm	8,000...8,015	7,000...7,015
BE05.30-P-1004-02B	Valve guide length	L		mm	37,5	37,5
BE05.30-P-1004-02B	Valve guide length	Fig. see			AR05.30-P-3731AO	AR05.30-P-3731AO
BE05.30-P-1005-02B	Overlap in cylinder head			mm	0,029...0,051	0,029...0,051
BE05.30-P-1006-02B	Securing washer	not fitted	=> 0		1	0
BE05.30-P-1006-02B	Securing washer	fitted	=> 1		1	0
BE05.30-P-1007-02B	Dimension	U		mm	2,7...2,9	-
		B		mm	5,4...5,6	-
		c		mm	8,2...8,6	10,2...10,4
		Fig. see			AR05.30-P-3731AO	AR05.30-P-3731AO