Twin cam oil puking from a/c
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Tourer
Joined: Oct 2008
Posts: 279
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From: NE, Ohio
Twin cam oil puking from a/c
I know there are a lot of discussions on this topic however all situations seem to be a little different. I have a 2006 Ultra recently upgraded to 95" big bore, Andrews 26's, compression at 9:6, mild head work and baisley oil spring. It had and still does, SE air cleaner and Rinehart slip ons and a fuel tuner. I followed the break in recommended by the shop that did my boring and piston fitment. Had no problems for the first 900 or so miles. Then one day ran her pretty hard for 10 or so miles and after settling in to a 50mph cruise home she started blowing oil out the air cleaner, not a small amount, probably several ounces. I pulled over figured I blew a piston or dropped a valve through one, waited a while checked oil , then started motor to see what I had. Perfect, started right up, no noises, good power, figured I'd better get it home. Looked it up on this forum saw it was pretty normal with oil level at full. Now with the oil level down figured I was good to go. Took it out yesterday and it started again, couple ounces of oil dropped between lifter blocks. Took AC off and found filter soaked at bottom and seal distorted and torn. Could this cause too much air movement inside air cleaner? How important is the seal of the AC backing plate? I ran it in the driveway with out the air cleaner and there is no pressure coming out of head vents. Any thoughts would be appreciated.
Intermediate
Joined: Dec 2008
Posts: 45
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Just a suggestion, had a similar issue on a 96" Rocker. The heads vent into the throttle body. If you get too much oil up in the heads it gets drawn into there and will soak everything. Long story but in my case the line that vented the sump to the oil tank was gone causing the sump to be full of oil instead of getting back to the tank. When there is too much oil in the engine piston action ends up pumping a lot of it and vapor into the heads which gets drawn into the TB.. maybe there's a problem in your oil lines somewhere...
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macodaniel
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Mar 16, 2015 05:21 PM
