Exhaust leak

[ricky]

Well problem contiued,when I was getting check out in my t-craft,instructor notice a smoke comeing up on my the right floor,where the suspension is located,

Also there no cover for the bungy cord,would that cause smoke to come in to cabin,plus the tip of the pipe is curved down toward the suspension also there a oil drip comeing from the back side of the oil drain plug,going to change with new washer,any one had problem like that before.
Rick

[blakecarl]

Re: Exhaust leak

Rick – We have had problems with excessive exhaust fumes in our Tcraft also. However they were never visible to the naked eye. If you haven’t already looked at a thread I started called “Fumes In Cockpit”, there may be some help there for you.

As far as our problem, we had a new stainless exhaust stack fabricated which has just been installed. Hopefully, our Tcraft will be flying next week sometime. I’ll let you know if this has addressed our problem

Blake

[Pearson]

Re: Exhaust leak

Regarding your new stainless exhaust system; did you have a stainless version of the original system made? Or did you go with a dual exhaust style?

I ask because I recently had to remove my engine to weld up leaks in my original steel system. I am interested in having a stainless dual system made. Please let me know if you are happy with your fabricators work, and if so I would like contact info.

Thanks!

[Doc]

Re: Exhaust leak

While landing at our home base (1T8) last Saturday after a 9.2 hour two ship cross country around south Texas, Mark radioed me to tell me he noticed I was leaving a smoke trail on downwind to base leg. Upon shut down, I noticed some oil dripping out of the exhaust stack. After confirming that all cylinders had compression, the bottom plugs were inspected. The #2 cylinder bottom plug was oil washed. Upon pulling the cylinder, I found the oil ring broken 180 degrees from the gap...the cylinder wall was very badly scored and both compression rings were stuck in their channels (probably due to coking) . The other 3 cylinders were pulled today, and only #3 had free ring movement...both #1 and #4 had the top compression ring stuck in the channel. Total time on the Milleniium cylinders was 47 hours...they are going back to the cylinder shop Monday for evaluation as I am sure #2 will be scrapped. The other 3 will probably be honed and re-ringed. My initial impression is that this is a product failure as 3 cylinders had stuck rings. More info later, but oil temp and pressure was normal dring the flight...as was performance. Doc

[Pearson]

Re: Exhaust leak

Doc,

I for one, would be interested in hearing what the evaluation of your cylinders reveals. Also, what type of oil were you using, and the break in procedure used.

Did the engine get hot at any time during those 47 hours?

I keep flip flopping back and forth on whether I want to rebuild some original cylinders I have, or buy the newer technology aftermarket types. Just about the time I think I have convinced myself to go with the new technology, I hear about something like this and think maybe I should stick with what has been working for the last several decades. I know all about the cost and all that. They are so close, it is hardly even a factor. I want reliability, even if it costs more!

Please keep us posted on what you find.

[blakecarl]

Re: Exhaust leak

Regarding your new stainless exhaust system; did you have a stainless version of the original system made? Or did you go with a dual exhaust style?

I ask because I recently had to remove my engine to weld up leaks in my original steel system. I am interested in having a stainless dual system made. Please let me know if you are happy with your fabricators work, and if so I would like contact info.

Thanks!

Richard - We had an original version fabricated by Aircraft Exhaust Inc. out of Princeton, MN. It took significantly longer than promised to receive the first time. There were fit problems which we eventually figured out to be a result of their template engine being 1/2" wider than our A65. They were using an O200 which they had understood to be the same as an A65. Anyone know if this is actually the case or not?

If you'd like to know more about Aircraft Exhaust let me know.

Blake

[Pearson]

Re: Exhaust leak

Sounds like that might have been their first time doing a Taylorcraft exhaust. I am considering just buying some stainless tubing and fabricating a Luscome 8E style system on my own. I can do the welding no problem. My concern is making the pipe bends and notching it out so it mates up precisely.

If someone here has experience with a good fabrication shop making a quality stainless system from scratch, I would like to hear about their experience.

[ricky]

Re: Exhaust leak

I was talking to guy at t-ctaft antique building,he siad if the oil hit the
shield(baffel) it will send smoke into the cabin,install new ring in plug,cut off the curve piece of pipe,extend the pipe 1 1/2 inches longer,will do run up as the weather get better outside,install a monoxide detection in the cabin,where see what happen,have new exhaust waiting to install,just want to get the check ride done first,then put the old engine back in,as we pull
it out as we thought we had engine problem,as cause for vibration was the
propeller,not engine.
Rick

[ricky]

Re: Exhaust leak

I was talking to guy at t-ctaft antique building,he siad if the oil hit the
shield(baffel) it will send smoke into the cabin,install new ring in plug,cut off the curve piece of pipe,extend the pipe 1 1/2 inches longer,will do run up as the weather get better outside,install a monoxide detection in the cabin,where see what happen,have new exhaust waiting to install,just want to get the check ride done first,then put the old engine back in,as we pull
it out as we thought we had engine problem,as cause for vibration was the
propeller,not engine.
Ri