exhaust pipe springs

by tom oatman in 912 / 914 Technical Questions 9 years ago

hello all, I am a newbie here. I just bought a RV-12 with a Rotax 912 engine. I had to take muffler off, and I had a difficult time getting the 8 springs of the muffler-pipe connecctions. how do I get them back on ??, is there a little tool?, similar to brake springs ?.
any help is surely appreciated.

tom o.

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Re: exhaust pipe springs

by Tom Delaney » 9 years ago

Tom Delaney

9 12 14

On my 12 I hooked one end of the spring and then wrapped safety wire around the other end Vice grip on the safety wire and pull

Tom

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Re: exhaust pipe springs

by Roger Lee » 9 years ago

Roger Lee

126 5.13k 4.58k

An easy way to get these off is to use a 12" long pair of needle-nose pliers. I have a set that I put some grooves in with a Dremel tool with a cut off blade. These keep the pliers from slipping no matter what you grab. You do not need to groove them if you don't want. Just hook the spring on the top loop. Then grab the bottom hook with the 12" needle-nose and use both hands and your weight to apply downward pressure to hook it. With your weight or just a good lever with both arms using the needle-nose the spring just pops right on. Takes just a minute or two to put all of them on. This makes taking springs on or off easy.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Re: exhaust pipe springs

by tom oatman » 9 years ago

tom oatman

5 28 0

Tom;
thanks for the tip, next weekend I will try your technique and put them back on. the reason I took the muffler off is the muffler was rubbing hard on the oil line that comes out of the bottom of the crankcase. if I didn't catch it, soon it would have worn through the oil line and I would have lost all of my oil....not good.
I think I will have to modify my muffler and cut & weld a relief to give clearance between muffler and oil line.
I think there is plenty of volume in the muffler to allow a 1 cubic inch reduction.

tom o.

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Re: exhaust pipe springs

by tom oatman » 9 years ago

tom oatman

5 28 0

roger, thanks for the ideas on the springs. I have been reading this forum for just a short time, and you are a saint in offering all of your expertise
THANK YOU!

the reason I took the muffler off is the muffler was rubbing hard on the oil line that comes out of the bottom of the crankcase. if I didn't catch it, soon it would have worn through the oil line and I would have lost all of my oil....not good.
I think I will have to modify my muffler and cut & weld a relief to give clearance between muffler and oil line.
I think there is plenty of volume in the muffler to allow a 1 cubic inch reduction.
I am thinking that manufacturing tolerances added up to make the muffler interfere with the oil line. have you ever seen that ?.

Tom O.

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Re: exhaust pipe springs

by Roger Lee » 9 years ago

Roger Lee

126 5.13k 4.58k

Hi Tom,

Thanks.
I take lots of mufflers off and in the beginning I got tired of grunting and groaning and busting knuckles. The 12" needle-nose pliers with some grooves cut across the jaws works really well. Just using hand strength can be tough depending on which springs you have. Using your bodies weight or at least your upper body weight makes this an easy process.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report

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exhaust pipe springs

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