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Norton Commando crank case breather issues! #324667
07/25/10 6:10 am
07/25/10 6:10 am
Joined: Dec 2007
Posts: 6
vancouver canada
B
ben cameron Offline OP
BritBike Forum member
ben cameron  Offline OP
BritBike Forum member
B

Joined: Dec 2007
Posts: 6
vancouver canada
Hello fellow bikers.
Ive just finished rebuilding my 72 commando and must say Im pretty happy with it! Because of work load over the last few weeks its been sitting and has wet sumped. Today when I drain the oil from the case I find a disturbing amount of debris in the oil. After closer examination I discover that its fragments of the breather foam (part no. 062615). I then removed the breather body and find that the entire foam has broken down (nothing left in the body but for a few scraps). What now..........? My thought was to flush the case through the breather hole. With what.........? Has anybody ever experienced this before? The part was purchased from a reputable dealer.
Any help or advice would be really appreciated.
Regards,
Ben.


75 commando
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72 bonnie
69 441
67 barracuda
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Re: Norton Commando crank case breather issues! [Re: ben cameron] #324685
07/25/10 10:43 am
07/25/10 10:43 am
Joined: Aug 2001
Posts: 888
Annapolis, MD
Dennis B, R.I.P. Offline
BritBike Forum member
Dennis B, R.I.P.  Offline
BritBike Forum member

Joined: Aug 2001
Posts: 888
Annapolis, MD
Ben,
Did the breather have the retainer discs (063116) installed?
If not, this would allow the separator (062615) to bang around in there
and was probably the reason for it's destruction.
The big worry would be fragments in the drive side main bearing.
I would leave the separator out and put it back together
(On my Commando I don't have a separator installed, and have had no problems with it)
and put a brake boost check valve in the vent tube up by the tank
I would also recommend Valvoline straight 50W VR-1 oil
your oil filter will catch anything that tries to get past it.
HTH
Cheers
Dennis B


Member # 182
'73 750 Commando
'72 Combat Commando
'71 Triumph Blazer
'69 Victors
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'51 Royal Enfield 250 'S'


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