Allis-Chalmers — Cylinder head reinstallation
Repair & overhaul
From a Allis-Chalmers operator's manual covering: 16000MKII, 17000MKII, 21000MKII, 25000MKII. Check it applies to your exact model before use.
Before you start
- Use new cylinder head gaskets.
Procedure
- Screw guide studs into capscrew holes.
- Install new cylinder head gaskets with side stamped TOP up.
- Check to make certain no foreign matter has entered cylinders.
- Dip capscrews in clean engine oil and allow to drain.
- Position heads and insert capscrews finger tight.
- Remove guide studs and insert remaining capscrews.
- Align manifold surfaces and tighten capscrews in numerical sequence to half torque, full torque, then retighten.
- Set cold valve lash, run engine to 160°F, retighten capscrews, set hot valve lash.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Torque per Topic 10
- Cold lash intake .020 in, exhaust .025 in
- Hot lash intake .015 in, exhaust .020 in
Source: Allis-Chalmers operator'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.