How to replace the os engine rod

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mgorgis
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How to replace the os engine rod

by mgorgis » Thu Jul 21, 2011 3:08 pm

Hi,
I crashed my 600N the other day and the rod that connects the piston to the crank shaft broke. I have a used rod from earlier engine that was worn (the engine) so I use it for parts. Because the rod is broken from the crank shaft side I didn't need to disassemble it but I need to get the new one in and that's where I'm stuck. I've been searching and finding some vids for os engines but can't see how the rod is connected
Please help!..... :oops:
Martin

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Silverlyx
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by Silverlyx » Thu Jul 21, 2011 3:13 pm

Not good news :( .

You will need to remove the head from the engine and then the cylinder liner before you can replace the rod. You will need to remove the piston to remove the gudgon pin from the piston anyway.

Hope that helps
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Silverlyx
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by Silverlyx » Thu Jul 21, 2011 3:16 pm

Not good news :( .

You will need to remove the head from the engine and then the cylinder liner before you can replace the rod. You will need to remove the piston to remove the gudgon pin from the piston anyway.

Hope that helps
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mgorgis
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by mgorgis » Thu Jul 21, 2011 3:32 pm

Silverlyx wrote:Not good news :( .

You will need to remove the head from the engine and then the cylinder liner before you can replace the rod. You will need to remove the piston to remove the gudgon pin from the piston anyway.

Hope that helps


Thanks for the fast reply! I've removed everything except liner and bearings. I was hoping I could replace the piston and rod without needing to remove the liner but that seems to be imposible! I've earlier removed the liner on an older engine using heat but I didn't re-assemble that engine so....:) I'll try the heat method here too then....thanks for now :)
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Silverlyx
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by Silverlyx » Thu Jul 21, 2011 3:52 pm

If it's an os engine you should nOt need to heat the engine to remove the liner!!!!!! The liner should slide out once the head is removed !!!
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by benjomeen » Thu Jul 21, 2011 4:47 pm

some will slide out some wont thats just nitro engines for you just stick it in the oven for a bit it will just about fall out

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by edwardyturralde » Thu Jul 21, 2011 6:16 pm

Dont forget to remove carb and o'rings before putting in the oven so that you can remove the liner. Then you need to put the piston and shaft first then the liner to put it back in.
Thanks,
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by benjomeen » Thu Jul 21, 2011 6:22 pm

av just got my self a nice weston 50 engine for me raptor should be a canny power house :)

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mgorgis
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by mgorgis » Thu Jul 21, 2011 8:48 pm

The liner just slided out thank god. Engine is repaired now, will try to start it tomorrow just the engine as the heli still needs parts. Another question here: What's the easiest way to remove the nut on the engine gear head? the engine gear head is the one above the clutch bell. There's a bearing directly under that nut and it's not running smooth so I need to change it. Can I just hold the gear with pliers and try to loosen the nut?
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by michael.lathwell » Thu Jul 21, 2011 9:29 pm

There is a great how to for these engines on here somewhere I wouldnt personally start the engine without any load but that might be just me
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by benjomeen » Thu Jul 21, 2011 9:32 pm

as you say not best idea starting under no load . a prop is ok butbest just waiting till heli is sorted

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mgorgis
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by mgorgis » Thu Jul 21, 2011 11:02 pm

I think I've heard that too....best I wait then! :)
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