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MG Y Type
Parts Cross Reference page

Engine Internal 2

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Ref #

Description

Original Equipment MG Part Number

NTG
Part
Number

Moss Europe Part Number

Moss USA Part Number

Amount Required

YA

YT

YB

 

1

Bearing for connecting rod

MG862/179

- see footnote.

8

8

8

Top

2

Nut

MG862/178

B093

311-080

311-080

8

8

8

Top

3

Bolt for cap

MG862/177

320-880

320-880

8

8

8

Top

4

Connecting rod with caps and bolts

MG862/14

B164

433-780

433-788

4

4

4

Top

5

Clamp screw for gudgeon pin

X151/14

B123

320-898

320-898

4

4

4

Top

6

Spring washer

X151/15

-

-

-

4

4

4

Top

7

Gudgeon pin

MG862/340

Sold as part of complete Piston Set only

4

4

4

Top

8

Pistons complete (with rings and gudgeon pin)

SA2418/2

- see footnote.

4

4

4

Top

9

Piston ring (oil control)

MG862/174

- see footnote.

4

4

4

Top

10

Piston ring (compression)

MG862/173

8

8

8

Top

11

Spring clip for rocker-shaft

MG679/199

B252A

326-110

326-110

2

2

2

Top

12

Washer for spring clip

MG679/200

B763

324-420

324-420

2 (10 after engine 16831)

2 (10 after engine 16831)

2 (10 after engine 16831)

Top

13

Spacer spring (short) (front, intermediate, and rear)

MG679/201

B762A

329-360 early, 329-160 later

329-360 early, 329-160 later

2 (4 after 16831)

2 (4 after 16831)

2 (4 after 16831)

Top

14

Bush

MG862/208

B253A on 378mm shaft

330-080 on 378mm shaft

330-080 on 378mm shaft

2

2

-

Top

B253B on 356mm shaft

330-090 on 356mm shaft

330-090 on 356mm shaft

-

-

2

15

Rocker with bush (Nos. 1 and 5)

MG862/20

B391C

433-150

433-150

2

2

-

Top

B391d

433-160

433-160

-

-

2

16

Adjuster screw for rocker

MG679/202

B243C

433-200

433-200

8

8

-

Top

B243d

433-210

433-210

-

-

8

17

Locknut for adjuster screw

X151/7

B243

311-110

311-118

8

8

8

Top

18

Lock plate for support bracket bolts

MG862/197

B886 (set of 4)

433-108

433-108

4

4

4

Top

19

Bolt for support bracket (8 mm)

MG862/195

B258

320-330

20-330

4

4

4

Top

20

Bolt for support bracket (10 mm)

MG862/196

B257

320-530

320-530

4

4

4

Top

21

Support bracket for rocker shaft (front, intermediate and rear)

MG862/194

B254

433-060

433-060

4

4

4

Top

22

Washer (Nos. 1 and 4 brackets)

MG862/198

B255

433-080

433-080

2

2

2

Top

23

Bush

MG679/202

B253A on 378mm shaft

330-080 on 378mm shaft

330-080 on 378mm shaft

2

2

-

Top

B253B on 356mm shaft

330-090 on 356mm shaft

330-090 on 356mm shaft

-

-

2

24

Rocker with bush (Nos. 2 and 6)

MG862/21

B391E

433-170

433-170

2

2

2

Top

25

Spacer spring (medium) (inter.) ceased 16830

MG862/202

B762B

329-160

329-160

2

2

2

Top

26

Rocker with bush (Nos. 3 and 7)

MG862/22

B391F

433-180

433-180

2

2

2

Top

27

Rocker with bush (Nos. 4 and 8)

MG862/19

B391A

433-180

433-180

2

2

-

Top

B391B

433-140

433-140

-

-

2

28

Washer (Nos. 2 and 3 brackets)

MG862/199

B256

433-070

433-070

2

2

2

Top

29

Spacer spring (long) (centre)

MG862/203

B762C

329-360

329-360

2

2

2

Top

30

Plug for rocker shaft

MG679/192

-

-

-

2

2

2

Top

31

Split cotters for valve spring

MG679/105

B007G

433-040

433-040 or 433-058 set

16

16

16

Top

32

Cap for springs (top)

MG862/192

B009B

433-010

433-010

8

8

8

Top

33

Spring for valve (inner)

MG862/188

B009 (set of 8)

423-410

423-410

8

8

8

Top

34

Push road assembly

MG862/27

B286

433-330

433-330

1

1

1

Top

35

Spring for valve (outer)

MG862/189

B009 (set of 8)

423-410

423-410

8

8

8

Top

36

Valve guide (inlet)

MG862/183

B008A*

P100 or 423-215*

423-238 std set, 423-010 or 423-215*

4

4

4

Top

Valve guide (exhaust)

MG862/184

B008B*

P101 or 423-225*

423-238 std set, 423-220 or 423-225*

4

4

4

37

Cap for springs (bottom)

MG862/190

B009d

433-030

433-030

8

8

8

38

Valve (inlet)

MG862/186

B006

423-010

423-058 std set, 423-010

4

4

4

Top

Valve (exhaust)

MG862/187

B007

423-020

423-058 std set, 423-025

4

4

4

Hardened valve inserts suitable for unleaded conversion

Not original equipment

B008G (exhaust valve only required)

-

-

39

Tappet

MG862/223

B315

AEG127

433-388 set only

8

8

8

Top

40

Rocker shaft with plugs - 356mm

MG862/18

B252B

451-170

451-170

1

1

1

Top

Rocker shaft with plugs - 378mm

B252C

451-180

451-180

-

-

1

41

Packing ring for valve

MG706/443

G830 (set of 8)

297-108 or ADU4905

297-108

8

8

8

Top

42

Oil deflector for valve

MG862/191

B009C

1H725

423-520

8

8

8

Top

 

Connecting Rod bearings, replacement sets.

Connecting Rod bearings are only available as full set replacements and the part numbers vary according to oversize requirements.

Connecting Rod Bearing Set

Oversize

NTG

Part Number

Moss Europe Part Number

Moss USA Part Number

Standard

B210

424-000

424-000

0.010

B211

424-100

424-100

0.020

B212

424-150

424-150

0.030

B213

424-200

424-200

0.040

B214

424-250

424-250

0.050

B215

424-300

424-300

0.060

B216

424-350

-

 

Piston sets are similarly in the following oversize.

Piston Set

Oversize

NTG

Part Number

Moss Europe Part Number

Moss USA Part Number

Standard

B050

420-018

420-018

0.010

B051

-

-

0.020

B052

420-038

420-038

0.030

B053

420-048

420-048

0.040

B054

420-058

420-058

0.050

B055

-

-

0.060

B056

420-068

420-068

0.080

B058

420-078

420-078

0.100

B060

420-088

420-088

0.120

B062

420-098

420-098

Piston rings are also available in the following oversize.

Ring Set

Oversize

NTG

Part Number

Moss Europe Part Number

Moss USA Part Number

Standard

B050A

421-010

421-010

0.010

B051A

-

-

0.020

B052A

421-020

421-020

0.030

B053A

421-030

421-030

0.040

B054A

421-040

421-040

0.050

B055A

-

-

0.060"

B056A

421-050

421-050

 

* Valve guides in Phosphor Bronze from NTG and Manganese Bronze from Moss Europe and USA