Primary oil leak
Thread Starter
|
Tourer
Joined: May 2009
Posts: 263
Likes: 0
Primary oil leak
When I start my 1974 XLH it starts to pump oil out of the oil fill plug on the primary. Any ideas as to what causes this and what I can do to fix it.
The plug is tight but the breather hole in the middle of the plug is where the oil is running out. Also the oil inside the primary is at the appropriate height and the oil in the oil tank was low when I shut the bike off.
The plug is tight but the breather hole in the middle of the plug is where the oil is running out. Also the oil inside the primary is at the appropriate height and the oil in the oil tank was low when I shut the bike off.
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
When I start my 1974 XLH it starts to pump oil out of the oil fill plug on the primary. Any ideas as to what causes this and what I can do to fix it.
The plug is tight but the breather hole in the middle of the plug is where the oil is running out. Also the oil inside the primary is at the appropriate height and the oil in the oil tank was low when I shut the bike off.
The plug is tight but the breather hole in the middle of the plug is where the oil is running out. Also the oil inside the primary is at the appropriate height and the oil in the oil tank was low when I shut the bike off.
(1) Blows oil out the vent hole in the filler cap, and...
(2) The oil level in the oil tank was low after sitting awhile?
I say the oil level inside the primary and trans is too high.
If the bike sat for a bit without being cranked up then what has happened is the oil leaked past the check valve in the oil pump. This removed oil from the tank.
The oil drained through the pump by gravity and collected in the engine lower end.
After that, the oil ran from the sump into the primary cover (you did have the bike on the side stand while it sat without being cranked didn't you?) The sump oil drained through the transfer valve into the primary and then into the transmission.
The fix:
Drain the oil from both the primary and the transmission by removing both drain plugs.
Replace the plugs and fill the primary and transmission with 24oz of engine oil. That should cure the problem. And yeah, crank up the bike more often to keep the oil from leaking down into the lower end.
pg
Stage I
Joined: Jun 2014
Posts: 1
Likes: 0
From: n.c.
When I start my 1974 XLH it starts to pump oil out of the oil fill plug on the primary. Any ideas as to what causes this and what I can do to fix it.
The plug is tight but the breather hole in the middle of the plug is where the oil is running out. Also the oil inside the primary is at the appropriate height and the oil in the oil tank was low when I shut the bike off.
The plug is tight but the breather hole in the middle of the plug is where the oil is running out. Also the oil inside the primary is at the appropriate height and the oil in the oil tank was low when I shut the bike off.
Thread
Thread Starter
Forum
Replies
Last Post
