400SEL (140.043) V8-4.2L (119.971) (1993)
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Knock out valve guide (54) with drift (1) from combustion chamber side.
Removal drift 103 589 03 16 inlet dia. 8 mm
Removal drift 103 589 02 15 inlet, exhaust dia. 7 mm and 9 mm
with basic bore 13.6 mm
Measuring Valve Guide
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Measure O.D. with micrometer.
Determine which valve guide is installed.
Match up next larger valve guide, see tables above.
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Ream basic bore in cylinder head to standard size 1 or to repair size 1 depending on matched valve guide.
Standard Size 1 (Ream basic bore with reamer)
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Ream basic bore through with reamer (3).
Use reamer 104 589 00 53 00 for basic bore of 13.53 mm.
NOTE:
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Lubricate with petroleum.
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Ream with only a slight pressure and do not twist reamer (3).
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Clean blades of reamer before each reaming operation.
Repair Size 1 (Ream Basic Bore With Broaching Tool)