Hi Guys,
I have an 81 SC 3.0L engine that was apparently rebuilt about 1000miles ago albeit its sat unused for about 18months. i have eventually got the engine running on a test bench and appear to some blue smoke coming from my exhaust.
order of events.
-tested compression after 18months of not running 1,3,4,5,6 120psi no.2 90psi
- i filled the oil tank with oil
- fired the bus up for 20-30secs
- turned off
- fired up again for 20-30secs
- oil was coming out of the tank breather. worked out there was too much oil, so dropped oil and refilled with 10L to run on bench (spec says 13L but for bench testing i put 10L
- ran engine for 10-15mins on high idle (1500-2000rpm)
- smoke coming out of the exhaust continuously.
- compression tested cold 1,3,4,5,6 155-158psi and 2 105
- inspection under engine shows oil on the fins so some oil leaking form somewhere.
i am not quite sure whether the low compression is due to piston rings or valve not closing properly. i am surprised as the engine was runnin g fine before the stint of not runnins - i saw this with my own eyes. compression was low on engine before i over filled it with oil.
any ideas guys?
pic of engine bench setup (photo taken before rig was finished):
