jedijody

My Feedback: (1)

http://www.castrol.com/castrol/secti...tentId=7040924

aa2dd

Thanks TOM was just trying to learn. still learning!

Thanks for info

Bruce

jedijody

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TOM? TOM who?

Oh, him.

Tired Old Man

My Feedback: (1)

What you've observed in the training video is by no means a "one off" deal. It happens far more often than you might think, and on a multiple unit weekly basis. It just doesn't happen to be with Stihl tools though, so the bragging rights have to be contained. BTW, 500 hours is sort of "low time"

Antique

My Feedback: (4)

I DEFY ANYONE to show me how Klotz can cause a wrist pin bearing failure without the piston being seized from heat amd the wrist pin turned blue... ...ANYONE [:@]

BadAzzMaxx

Same here,

The needles where not heat treated right and the outside peeled from the inner side.

Seen it more than once with a lot China made engines

Milton

Andika

ctshepherd

My Feedback: (34)

In this case, the wrist pin bearing is not the one that failed. It was the crank pin bearing the gave up and puked.

ctshepherd

My Feedback: (34)

Some additional pictures. First is the plane the engine was installed and the rest are of the torn down engine. The picture of the bearing is of the wrist pin bearing.

Valve floater

100`s of things could have caused that bearing to fail. As stated it was bought used. Can it be trusted to how many hours it actually had. A simple hard prop strike can cause the bearing to nick and fail 10 flights or 20 flights later. I had one of the first DL-50`s made that i put 400 to 500 flights on it. Ran it balls to the wall wide open the whole time. Finally changed just the crank bearings and ran it another 60 flights till the rod bearing failed. Had a tick at idle because of the slack. I should have changed the crankshaft when i took it apart. Didn`t feel like fixing it again. I got more than my monies worth out of it. Just got a new DLE-55 from VV and have about 20 flights on it. Went from BEL-RAY mc1 on the DL to Stihl Ultra on the DLE even at break`in. Running at 32:1 a little rich on oil for now.

Antique

My Feedback: (4)

MY bad, sorry, outta here

oskartek

        I have seen more than a few of these engines have the same failure on a wide range of fuels
and lubricants, so the underlying problem may be inconsistent control of the heat treating process
of the bearings possibly by different suppliers.

One note, you can also cause bearing failure in needle/roller/ball bearings by over oiling them
causing the needle/roller/ball to "skid" thus causing galling and ultimately bearing failure.

Happy flying, Oscar</p>

bgw45

My Feedback: (1)

Happened to me. I also think it is bearing and specifically the bearing cage. JMHO

bkdavy

My Feedback: (1)

I've had two DLE-55's crank end bearings fail. In both cases, the pending failure was obvious in hindsight. It's easily felt by looking for the play on the bearing by rotating the prop to the compression point, and then trying to wiggle it back and forth. There is always some end play, but it should be very small. My experience so far is that it should be less than about 1/16 inch at the prop tip on a 22 inch prop. If the play is approaching 1/4 inch, you are probably looking at a pending failure, and should open up the engine and inspect or replace your crank assembly. Met a flyer this summer while preparing for a contest, and saw the endplay on his engine. Warned him that failure was imminent, but he decided to fly it to failure. Sure enough, engine failed that week. There is also an audible metallic note that will develop in the engine as the bearing is approaching failure. Finally, you may notice an unsteady or unreliable low idle.

The good news is that the crank is easily and quicly replaced with a few simple tools, and costs less than the cost of shipping the engine back and forth to have it repaired. I now keep a spare crank and piston assembly for contest weekends in the event of an impending failure.

Brad

bgw45

My Feedback: (1)

The only crank bearing failures I have seen are on the "early" style bearing. The cage on the early style bearing looks to be made of brass. The new style bearings have a steele looking cage. Has anyone seen a failure of the newer style of crank bearing?

P47Tbolt

My Feedback: (20)

What about using this oil? Lucas semi-synthetic 2 cycle oil.
Lucas has great products,but just wondering what you thought about this oil.



http://www.amazon.com/SEMI-SYNTHETIC.../dp/B0002KKTW2

HunkaJunk

That's what I'm saying, there is no evidence that this was a failure due to lubrication, or lack thereof.

Truckracer

My Feedback: (19)

A friend of mine is using the Lucas oil. It leaves a very thick STP like residue on the bottom of the plane but very little of it .... normal amount actually. Seems to be working OK for him but I know nothing about it otherwise.

jedijody

My Feedback: (1)

I've never used or tested it, reading it's literature, it's not one I would choose.

BarracudaHockey

My Feedback: (11)

I had one of these that we caught before it failed due to the clunking noise.

It had taken a dirt nap about 15 flights prior.

oldtyme

So what's the matter with Klotz??? They've been around a long time and I've never heard a negative about them until now............please explain and substantiate your comment.

Antique

My Feedback: (4)

The red color in Rad Max glow fuel is from the Klotz in it...Red Max was my favorite glow fuel, our club bought it in 55 gallon drums....

blikseme300

My Feedback: (118)

+1

I have been using Klotz lubes for more than 20 years. They have a range of products for different fuels and uses, not one product. If you use the wrong product for your application then bad stuff can happen so choose and use the proper product for your application.

Oils are a personal choice so make your decisions and deal with it. Opinions and facts are often far apart from reality that it is impossible to be scientific regarding lubricants for our toys.

I know, intellectually, that many of the other lubes out there are good and may be better than my choice, but for any member here trying to be an oil gestapo enforcer does not help any of us.

Bliksem

Jezmo

Couple of other glow fuel suppliers use it as well and one of those others has been my personal fav for a while now. The one I use has the synth/castor blend.

av8tor1977

My Feedback: (6)

Take a good look at the piston top and make sure it wasn't experiencing detonation. Detonation will take out the rod bearings in a hurry, and from the looks of the carbon inside the piston top, it was running plenty warm...

AV8TOR





Moderator added piston pictures