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Old 08-13-2010, 07:57 AM   #1
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Default How to: change Nova 21-4C conrod

Hi

Need some help, I'm trying to change the conrod on a Novarossi 21-4C. I can't get the conrod big end off the crank. I do have the sleeve removed.

Anyone got any tips/tricks? I haven't cranked any force to try to pop the conrod off as I don't want to damage anything.
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Old 08-13-2010, 08:22 AM   #2
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you should be able to pull it off with your fingers. Try spraying a little WD-40 on the crank pin. If it still does not come off slip some fuel tubing on the tips of a needle nose pliers and use those to grab it and pull it off.
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Old 08-13-2010, 08:41 AM   #3
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Do you have an older dog bone from a different vehicle ? by chance a Hpi Savage bone ?
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Old 08-13-2010, 08:51 AM   #4
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here's from RB's website:



http://www.rbproducts.com/mainEn.php...ncept%20engine
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Old 08-13-2010, 02:52 PM   #5
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You can slide a tie wrap behind the rod and pull the rod off.
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Old 08-13-2010, 05:42 PM   #6
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if its a team its very difficult to get the rod off because of the tightened up tolerances with the cnc piston , tap the crank in to make sure the bearing is fully seated in the block , this will allow a little more room to get the rod off the crank .

if its the microcast piston it should be very easy and almost fall right out , especially if the rod is actually worn out enough to warrant changing it


if it will not come off easy it probably doesnt need changed unless u had some kind of a mishap during your teardown

the rod should really come off very easy when it at the top of the stroke

yes i have changed hundreds if not thousands of rods

if you are in doubt and dont feel like experimenting with your expensive engine you should probably send it to one of the engine guys to have your services performed
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Old 08-13-2010, 11:29 PM   #7
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Thanks for the answers guys. Use an old dog bone and it popped off easily.

I previously had v-specs and they were never that tight a fit.

Hack
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Old 08-14-2010, 02:03 AM   #8
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Quote:
Originally Posted by hack_1979 View Post
Thanks for the answers guys. Use an old dog bone and it popped off easily.

I previously had v-specs and they were never that tight a fit.

Hack
For me that is not too familiar with the English language, what is a dog bone?
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Old 08-14-2010, 02:14 AM   #9
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Quote:
Originally Posted by Klimpen717 View Post
For me that is not too familiar with the English language, what is a dog bone?
driveshaft
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Old 08-14-2010, 03:03 AM   #10
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driveshaft
Thanks
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Old 08-14-2010, 07:18 AM   #11
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Quote:
Originally Posted by hack_1979 View Post
Thanks for the answers guys. Use an old dog bone and it popped off easily.

I previously had v-specs and they were never that tight a fit.

Hack


exactly why i keep a sheared Savage dog bone around.
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