Picked up an 81 Laredo that has been sitting in a field for a number of years. PO said they ran the engine a year or so ago. What I did: New battery, new oil, cleaned and gapped spark plugs, bit of WD40 in each cylinder through the spark plug hole, new fueld filter, new gas.
Engine was started with the air filter off and the rear vent tube and plug from the air filter on the valve cover off.
When it started it sounded really rough like there was a hammer bouncing around inside. It was a regular interval sound. After several starts and running it at high RPMS for a bit, got out and there were several litres of my nice fresh oil which appeared to have come out the dip stick tube.
I did a compression test and front to back got 140, 140, 150, 160, 127, 117. Is the 117 bad enough that it would cause back pressure to push the oil out as it did?
I did not check the PCV as I figured with the above noted vent tube out of the valve coiver, it was not a cause.
Youtube for reference. Skip to 1:04 for when it first fired and 2:02 for the higher rev run.
Engine was started with the air filter off and the rear vent tube and plug from the air filter on the valve cover off.
When it started it sounded really rough like there was a hammer bouncing around inside. It was a regular interval sound. After several starts and running it at high RPMS for a bit, got out and there were several litres of my nice fresh oil which appeared to have come out the dip stick tube.
I did a compression test and front to back got 140, 140, 150, 160, 127, 117. Is the 117 bad enough that it would cause back pressure to push the oil out as it did?
I did not check the PCV as I figured with the above noted vent tube out of the valve coiver, it was not a cause.
Youtube for reference. Skip to 1:04 for when it first fired and 2:02 for the higher rev run.
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