Cummins/Onan N52M — Check Valve Clearance
Adjustments
For the Cummins/Onan N52M, from the Cummins/Onan service manual.
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Procedure
- Set valve clearance to .003" on intake and .012" on exhaust.
- Place one cylinder on compression stroke and adjust those valves.
- Turn crankshaft one full turn placing other cylinder on compression and adjust its valves.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Intake .003 in
- Exhaust .012 in
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.