Originally Posted By Wagonman1967
Originally Posted By Cab_Burge
OP, don't waste your money or energy on the conversion twocents
I had one of my old car hauler one ton trucks converted back in the mid 1970s when the first gas crisis was occurring for the increased fuel storage, 85 gallon tank. It had a 318 industrial poly motor in it and burnt the valves up real quickly puke Major expense on installing harden seat and new valves work that truck got 8.5 MPG on gas and 7.5 MPG on propane shruggy
I later bought a M1500 I.H chassis Class A 26 ft. motorhome that was set up on propane only, it sucked on POWER and MILEAGE down I removed the system, converted it back to gasoline and never looked back and I never regretted it work up
You are spot on Cab. I worked for a shop doing propane/Cng conversions for the county short busses. Lots and lots of valve jobs were done on those rigs. I chalked it up to low lubricty of the fuel/ intake charge. But what do I know?


In the 1992 CNG supplement to the
1992 Ram Van Field Service Manual,
it states that internal changes to the CNG version of the Magnum 5.2 V8 engine were
Chrome Plated Exhaust Valve and
Hardened Valve seat insert.