Hijet S110P — Engine Specifications

Valve Clearances

Adjustment Procedure

The EF-series uses a bucket-and-shim valvetrain. Clearances tighten over time as the valve seats wear — a valve hanging open during the combustion stroke will burn quickly.

1. Rotate the crankshaft to Top Dead Center (TDC) for the cylinder being adjusted — align the cam gear mating marks.
2. Confirm the cam lobe nose points straight up, fully off the lifter bucket.
3. Rotate the bucket so its cut-out faces inward toward the spark plug valley.
4. Use SST 09504-87501-000 to depress the bucket rim and extract the shim with a magnet or a puff of compressed air.
5. Measure the extracted shim and install the correct replacement thickness to bring the clearance into spec.

Ignition Timing

Set base timing with the engine fully at operating temperature using an inductive timing light. Switch off all electrical loads — headlights, blower motor — before taking a reading, and remove and plug the vacuum advance hoses so manifold vacuum does not advance the timing during the base setting.

Loosen the distributor hold-down bolt just enough to rotate the distributor, then turn it slowly and let the idle stabilize before reading the mark. If the timing mark jumps or stutters under the strobe, pull the cap and rotor — carbon tracking or a pitted rotor scatters the spark and causes hesitation and poor fuel economy. For points distributors, maintain the point gap at 0.2 – 0.4 mm.

Fastener Torque Values