Cummins/Onan — Valve Guide Replacement
Repair & overhaul · Valve guides
From a Cummins/Onan service manual covering: P216, P218, P220, P248. Check it applies to your exact model before use.
Applies to: Cummins/Onan P216, Cummins/Onan P218, Cummins/Onan P220, Cummins/Onan P248
Before you start
- Do not strike guide or tappet bores with the driver during removal.
- Do not allow the valve stem groove to come in contact with the valve stem seal after installation.
Procedure
- Use an electric drill with a wire brush to remove carbon and other foreign material from the top surface of the guides.
- Drive the guides out with a hammer and valve guide driver.
- Run a small polishing rod covered with crocus cloth through the valve guide holes to clean out carbon and foreign material.
- Place a new gasket on the intake valve guide and coat the outer edge of each new guide with oil.
- Place the guide in the cylinder block and press in until the guide protrudes 11/32 inch (8.7 mm) from the valve box side of the block.
Tools required
- electric drill with wire brush Amazon
- valve guide driver Amazon
- hammer Amazon
- polishing rod Amazon
- crocus cloth Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Guide protrudes 11/32 inch (8.7 mm) from the valve box side of the block
Full service-parts list: Cummins/Onan P216 →, Cummins/Onan P218 →, Cummins/Onan P220 →, Cummins/Onan P248 →
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.