(And yes, I have removed, cleaned, inspected ball and spring, even "tapped" the ball lightly while seated over the years with little success.) While not harmful, when it happens we all know it does tend to make a mess on startup as the crank vent is still routed to the Air Cleaner backing plate. I have an old bottom breathing 1985 EVO that like many, occasionally after a period of sitting will leak oil past the check ball and into the case. Ok, this happens when I have too much time on my hands, right? Really it was just a grasping at straw thing because nothing else worked. My buddy rides it hard at times and thanks me every time I see him. That's been several years ago now ,it still spews oil out of the breather hose, but now the oil is returned to the tank and the air from the crankcase is expelled through the oil tank vent. Then the oil vent from the tank at the bottom of the tank I attached a piece of hose and routed it to the ground just below the frame rails. I drilled the oil filler cap and installed an elbow fitting in it and attached the breather hose to it. I started looking at original oil line routing for that year of Triumphs and discovered that the crankcase breather hose was routed back to the oil tank and the oil tank vent had a hose routed to the back of the rear fender. I decided to change the oil pump with a new one from the original manufacturer, it made no difference. he wanted me to work on it for him ,install an electronic ignition, rebuild the carbs ,replace and relocate the coils etc and fix whatever I found. Nothing is stock with the oil tank and plumbing. They are Kept separate for a reason, Leave it that way.īTW a bit of Sumping after extended storage is Pretty normal.I have a buddy that has a 1968 Triumph chopper that constantly spewed massive amounts of oil out of the crankcase breather hose. That pressure will be a Very bad thing into the oil tank!! Have a great week.No.The vent line is to equalize the Gearcase to the Oil tank.īut, while some believe that the Breather will suck and Blow.and it should in theory.in actuality it mostly Blows.much much more pressure to get rid of than you will ever find going IN. What's the thought about venting like I've described above? "IF" one had the oil tank vented sufficiently enough, couldn't you just run your crank vent back to the tank and then have another vent line back to the bottom of the frame below the tranny?Īgain if properly vented, I wouldn't think the air pulses from the crankcase vent would be enough to do any damage to the oil tank or any other parts. If I think its sat too long between rides, I'll a cookie pan to catch the oil.
Of course as soon as I start it up, it blows about a pint out making quite a mess. Over the past 12 years it's been a very fun bike to ride, but of late, it tends to sit for long periods of time and the oil bypasses the check ball and fills the sump. I found on this site a diagram that I used to route my lines like your picture has them. At that time it was a auto oiler to the primary. I've got a question to go with your picture. guess that means lubing the chain with some type of spry. Also, the pump assembly has nothing for a rear chain oiler. On the pump itself the arrows point to the only two spots that are not plugged.
Just need to confirm that I will have the oil lines going to the right places. Helping a friend get his 75 FLH back on the road.
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