Re: Found this in the oil pan.
Posted by Owen_Dyneto On 2011/3/20 23:00:58
On models where the oil filler cap is indexed to the tube and uses the cap with the fresh air inlet slot, mounting it backwards really inhibits the action of the crankcase ventilation system - not good for the engine in the long run.
UPDATE: Though it's incorrect on this 23rd series Custom 8, the air draft tube shows why the cap slot is intended to face forward. It (draft tube) was added 41 thru 47 (seniors only) to insure air flow thru the crankcase ventilation system even while the car was idling. It was added shortly after the 356 engine came out in 1940 when evidence showed the short oil fill tube, blocked by the oil filter, inhibited crankcase ventilation. Longer fill tube, new cap, and draft tube was a running change. It was not used after the 21st series.
Attach file:
(153.90 KB)
UPDATE: Though it's incorrect on this 23rd series Custom 8, the air draft tube shows why the cap slot is intended to face forward. It (draft tube) was added 41 thru 47 (seniors only) to insure air flow thru the crankcase ventilation system even while the car was idling. It was added shortly after the 356 engine came out in 1940 when evidence showed the short oil fill tube, blocked by the oil filter, inhibited crankcase ventilation. Longer fill tube, new cap, and draft tube was a running change. It was not used after the 21st series.
Attach file:
(153.90 KB)
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=72735