Can gas fumes get in valve cover and ignite?

Yes, gas fumes can potentially enter the valve cover if there is a leak in the fuel system or if the engine is not properly sealed. If these fumes accumulate and are exposed to a spark or high temperature, they could ignite. However, this scenario is relatively uncommon, as most engine designs incorporate safety measures to prevent such occurrences. Regular maintenance and inspections can help mitigate risks associated with fuel leaks and engine issues.