When installing valve stem seals on a diesel engine, which procedure is correct?

When installing valve stem seals on a diesel

Multiple choice — select the best answer

ALubricate the seals with clean engine oil before installation
BInstall the seals dry to ensure proper seating
CApply thread locking compound to prevent rotation
DHeat the seals before installation to expand them

✓ Correct answer: A. Lubricate the seals with clean engine oil before installation Valve stem seals should be lubricated with clean engine oil before installation to prevent tearing during installation and to ensure smooth initial operation. Dry installation can damage the seals.

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When installing valve stem seals on a diesel engine, which procedure is correct?

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