Problems with valves with auto lpg/cng

[nerone]

hi CarloAv I work in a workshop authorised fiat and cars with an lpg system, I see all the days while the cng never seen one because they are in sardinia and here there is no the cng. the problems pi? there are frequent locking of the injectors and of the lung ...due to an oily substance that becomes a sort of caramel brown going to mess the whole system. to solve the problem usually wash everything by revising the lung with a kit aposito that contains everything, diaphragm and seals including,cleaning of the injectors with ultrasonic mode and replace the filter . sometimes the injectors nn are saved, and must be replaced,the cost is 60 euro each. with regard to the valves for me ? that just happened on the nissan note with lpg landi renzo installed from the factory . burnt valves and valve seats destroyed ... the car had about 80000 km. with the repair? the valve seats and the valves have been installed to a different material ... I don't know to tell you that material.... me ? been told apositamente for the car with the gas system. I can give you another information. loading the chassis of a fiat on the spare parts catalog original , the code of the valves change on a vehicle with a gas system, means that the fiat that come from the factory with the gas plant have the valves different from the fiat identical without the plant.I hope I helped you regards

[CarloAV]

Thanks for the clarification, so in your case the valves in the lpg systems represent a problem that rarely occurs right?