macgyverdan
New member
Hey guys,
I'm helping a friend rebuild his 2003 Viper ER engine and we can't figure out how these engines distribute oil properly. We Can't find a schematic or explanation anywhere. The one low compression cylinder has an oil feed port on the bottom case slinging the lower rod, but not the other two. How do the other 2 cylinders get oil? We see the hose going to the fuel pump from the oil pump. Is the fuel pump mixing the oil into the fuel going to the carbs. If so, isn't the low compression cylinder getting extra oil from the port below?
I'm helping a friend rebuild his 2003 Viper ER engine and we can't figure out how these engines distribute oil properly. We Can't find a schematic or explanation anywhere. The one low compression cylinder has an oil feed port on the bottom case slinging the lower rod, but not the other two. How do the other 2 cylinders get oil? We see the hose going to the fuel pump from the oil pump. Is the fuel pump mixing the oil into the fuel going to the carbs. If so, isn't the low compression cylinder getting extra oil from the port below?
roudyroy1
Active member
if the low comp cylinder is the center, that line probably feeds the water pump/ oil pump drive gear. In my experience if it was lack of oil causing low compression your crank would be tore up too. i'd post some pictures of your piston and cylinder. may be a lean burn down.