Perkins — To check and to adjust valve tip clearances (four cylinder engines)
Adjustments · Valve train
From a Perkins service manual — check it applies to your exact model before use.
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Procedure
- Rotate crankshaft in normal direction until inlet valve of number 4 cylinder just opened and exhaust valve not closed completely
- Check and adjust clearances of number 1 cylinder valves
- Set number 2 valves as above for number 4; check/adjust number 3
- Set number 1 valves; check/adjust number 4
- Set number 3 valves; check/adjust number 2
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Inlet 0,20 mm (0.008 in)
- Exhaust 0,45 mm (0.018 in)
Source: Perkins 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.