Allis-Chalmers — Valve Lash Adjustment
Adjustments · Valve rocker arms and valves
From a Allis-Chalmers owner's manual covering: 11000, 11000 MKIT, 11000MKII, T1Q00GMKII. Check it applies to your exact model before use.
Applies to: Allis-Chalmers 11000 / 11000MKII engine
Before you start
- Ensure adjusting screws are turned upward enough after mechanical work so pistons cannot strike valves when cranking.
Procedure
- Operate engine to minimum 160 F (344 K) coolant temperature, then stop engine.
- Clean valve rocker covers and surrounding area.
- Remove breather tube upper section, rocker cover nuts, sealing washers and covers.
- Crank engine until No. 6 exhaust valve is almost closed and intake valve starts to open.
- Check and adjust intake and exhaust valve lash for No. 1 cylinder to 0.018 in.
- Loosen locknut; turn adjusting screw clockwise to decrease or counterclockwise to increase clearance; tighten locknut.
- Following firing order 1-5-3-6-2-4, position each cylinder in turn and adjust its valves (5, 3, 6, 2, 4).
- Recheck lash after tightening each locknut.
Tools required
- 0.018 in feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 0.018 in (0.46 mm) hot, intake and exhaust
- 0.020 in (0.51 mm) cold setting
Full service-parts list: Allis-Chalmers 11000 / 11000MKII engine →
Source: Allis-Chalmers owner's 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.