Sintered Metal Valve Guides

Valve Guides And Basic Bores

Part 1 Of 3:

Part 2 Of 2:

Procedures





Knocking Out Valve Guide
- Knock out valve guide (54) with drift (1) from combustion chamber side.
Removal drift 111 589 02 15 00 inlet, exhaust 0 7 mm with basic bore of 12.5 mm.

Measuring Valve Guide
- Measure O.D. with micrometer.
Determine which valve guide is installed.
Match up next larger valve guide, see table above.
- Ream basic bore in cylinder head to standard size 1 according to matched valve guide or broach to repair size 1 if required.

Standard Size 1 (Ream Basic Bore With Reamer)





- Ream basic bore through with reamer (3).
Use reamer 119 589 00 53 00 for basic bore of 12.53 mm.

NOTE:
- Lubricate with petroleum.
- Ream with only a slight pressure and do not twist reamer (3).
- Clean blades of reamer before each reaming operation.

Repair Size 1 (Ream Basic Bore With Broaching Tool)





- Clean blades of broaching tool (8) with compressed air or plastic brush before each broaching operation.
- Insert guide sleeve (9) and broaching tool (8) into bucket tappet basic bore.
Use guide sleeve 119 589 05 63 00 and broaching tool 119 589 01 53 00 for basic bore 12.7 mm.
- Press broaching tool (8) through.

NOTE:
- Lubricate with petroleum.
- Clean broaching tool (8) with compressed air after each broaching operation.

Inserting Valve Guide, Checking ID





- Moisten valve guide (54) on outside with oil.

NOTE: It is not necessary to heat the cylinder head or to cool the valve guide (54).

- Knock in valve guide (64) as far as stop (arrows) with insertion drift (7).
Insertion drift 606 589 02 15 00 inlet, exhaust 0.7 mm.

NOTE:
- The circlip is not fitted to the sintered metal valve guides.
- The insertion depth is fixed by the insertion drift.

- Check the installation depth (c) of valve guide (54), correct if necessary.
- Clean valve guide (54).
Cylinder brush 000 589 10 68 00
- Check valve guide (54) to ensure tight fit.
- Check ID of valve guide (64) with inspection drift (4).
Inspection drift 102 589 01 23 00 inlet, exhaust 0.7mm.
It must be possible to insert fully the "Go" side (6) of gauging drift (4).
If it is not possible to insert the gauge, the valve guide should be replaced as the material of the sintered metal versions is too hard for reaming.