Waukesha TH570 — Valve Rocker Arm Clearance
Adjustments · Valve mechanism
For the Waukesha TH570, from the Waukesha service manual.
Applies to: Waukesha 570 and 884 engine
Before you start
- Never adjust valve clearances without loosening and retightening the adjusting screw lock nut.
Procedure
- Stop engine and allow to cool to room temperature.
- Remove cylinder head cover.
- Lubricate valve stems with light engine oil.
- Rotate engine until No. 1 piston is at TDC compression.
- Loosen rocker arm lock nut and adjust with feeler gauge.
- Tighten lock nut and recheck clearance.
- Follow firing order for remaining valves.
Tools required
- feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Intake .015-.017 in cold
- Exhaust .020-.022 in cold H570
- Exhaust .025-.027 in cold TH570
Source: Waukesha 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.