fuel pressure?? if it is fuel injected it should be on the end of the fuel rail.
there should be a valve on the fuel rail on the engine that you release the pressure, it looks just like a tire valve.
no pressure release valve
Relese the pressure by pushing the schrader valve under the hood on the right side of engine.
Valve clearance for a Honda GC160 engine; Inlet 0.15 +/- 0.04mm Exhaust is 0.20 +/- 0.04mm
Replace the PCV Valve.
On a 1985 Honda Civic, the PCV valve is situated on the firewall side of the engine. The valve is connected to the rubber hose.
In the valve cover
The EGR valve for a Honda EX 1991 is at the top of the engine. It is at the front, just to the left of center.
The Honda GX620 engine does not have a traditional Positive Crankcase Ventilation (PCV) valve like those found in many automotive engines. Instead, it typically uses a breather system that allows for ventilation of the crankcase gases without a separate PCV valve. This design helps to maintain proper pressure within the crankcase and allows for the escape of any accumulated gases.
intake valve 0. 20mm exhaust valve 0. 25mm
The Positive Crankcase Ventilation (PCV) valve in the Honda Odyssey serves to regulate the flow of gases from the crankcase back into the intake manifold. This process helps reduce harmful emissions by recycling unburned gases, preventing pressure buildup in the crankcase, and maintaining engine efficiency. Additionally, the PCV valve helps keep the engine clean by preventing oil contamination and sludge formation. Regular maintenance of the PCV valve is essential for optimal engine performance.
UNDER HOOD, CENTER, UPPER ENGINE AREA, TOP OF ENGINE, MOUNTED IN VALVE COVER