Notices
Car Nitro & Gas Engines Discuss all aspects of Nitro and Gas rc car engines here!

need help removing crankshaft.

Old 07-29-2008, 07:07 PM
  #1  
Stang444
Senior Member
Thread Starter
 
Stang444's Avatar
 
Join Date: Jun 2008
Location: Tampa, FL
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
Default need help removing crankshaft.

Hello all! I have a question!

I want to put a new flywheel/clutch assy. Onto a traxxas trx 2.5 engine. (for a non traxxas made rc.) Anyways, I need a standard universal crankshaft instead of the sg crank shaft. I have one that will fit, but I cant get the old one out!!! I have tried, but I dont want to force it and break something.

Please help me!
Old 07-29-2008, 09:30 PM
  #2  
NitroVette
Senior Member
 
NitroVette's Avatar
 
Join Date: Aug 2006
Location: S.E., MA
Posts: 336
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

Put it in the oven at around 250 degrees for a few minutes and it should come apart easy. Just remember that it's hot and work on it with some utility gloves.
Old 07-29-2008, 09:36 PM
  #3  
Turbotezza
Junior Member
 
Join Date: Apr 2008
Location: Princeton, NJ
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

Screw a short M3 screw all the way down the front hole & tap that to get the crank out.
Old 07-30-2008, 08:25 AM
  #4  
Stang444
Senior Member
Thread Starter
 
Stang444's Avatar
 
Join Date: Jun 2008
Location: Tampa, FL
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

Thank you, but I should've stated that more clearly. I need to get the conrod off the crankshaft. THEN get the crankshaft out.
Old 07-30-2008, 09:34 AM
  #5  
snowbl!nd
Senior Member
 
snowbl!nd's Avatar
 
Join Date: Jan 2005
Location: Manchester, UNITED KINGDOM
Posts: 3,779
Likes: 0
Received 1 Like on 1 Post
Default RE: need help removing crankshaft.

Remove the cooling head and sleeve - this should give you enough movement in the piston to work the con-rod off the crank pin.
Old 07-30-2008, 09:56 AM
  #6  
Stang444
Senior Member
Thread Starter
 
Stang444's Avatar
 
Join Date: Jun 2008
Location: Tampa, FL
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

Thanx I`ll try that!
Old 07-30-2008, 06:57 PM
  #7  
Stang444
Senior Member
Thread Starter
 
Stang444's Avatar
 
Join Date: Jun 2008
Location: Tampa, FL
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

Now the damn sleeve wont come out!


Not sure if you can see (sorry for the poor quality) but the sleeve is seated aaalll the way flush.





[img]/http://i300.photobucket.com/albums/nn19/stang444/NSiQuazitepics013.jpg[img]

Some one help me plz.
Old 07-30-2008, 08:31 PM
  #8  
Turbotezza
Junior Member
 
Join Date: Apr 2008
Location: Princeton, NJ
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

Ok, follow this procedure;

Make sure the piston is at the bottom (BTC. Bottom dead center).

From top of the engine, stick a small zip tie into the exhaust port & turn the crankshaft (you will probably need pliers) so that the piston pushes on the zip tie, which will in turn will push the liner up. If the liner won't budge, then you'll need to heat the engine in the oven & try the procedure again before it cools off too much. Careful not to burn your self.

Once the lip of the liner has cleared the top of the crankcase, lower the piston and remove the zip tie. With a small flat blade screwdriver, carefully lever out the liner a little more so that you can pull it out with your fingers.

To remove the piston, turn the crank until the piston is at the top (TDC. Top dead center). Turn the engine upside down & with your finger you should be able to pull the rod off the crankpin. In very rare cases, finder power may not be enough to pull the rod off and you need to resort to hooking a small zip tie or cord around the rod & using that to pull it off.

To install, reverse the procedure.


*Edit*
Since you have the piston/rod out of the engine, you may want to take the time to polish the varnish (brown stuff) off the top of the piston. You can use silver/brass polish & don't over do it, just enough to get the brown off.
Old 07-30-2008, 08:54 PM
  #9  
DaveG55
Senior Member
 
DaveG55's Avatar
 
Join Date: Jan 2005
Location: Stockbridge, GA
Posts: 8,275
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

It's also a good idea to note which way the piston comes out. Often they are directional.
Old 07-30-2008, 09:03 PM
  #10  
kersplat
Senior Member
 
kersplat's Avatar
 
Join Date: Aug 2004
Location: Lancaster Park, AB, CANADA
Posts: 340
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

The liner in these engines are fit snug, Heat the engine first , then the liner should slip out. Don't worry about the piston orientation, The back lower edge of the skirt has a relief cutout on it and it faces the side of the liner opposite the exhaust.
Old 07-31-2008, 01:33 AM
  #11  
378
My Feedback: (4)
 
378's Avatar
 
Join Date: Jan 2004
Location: Lebanon, TN
Posts: 2,861
Likes: 0
Received 2 Likes on 2 Posts
Default RE: need help removing crankshaft.


ORIGINAL: kersplat

The liner in these engines are fit snug, Heat the engine first , then the liner should slip out. Don't worry about the piston orientation, The back lower edge of the skirt has a relief cutout on it and it faces the side of the liner opposite the exhaust.

Cutout faces flywheel.
Old 07-31-2008, 08:41 AM
  #12  
Stang444
Senior Member
Thread Starter
 
Stang444's Avatar
 
Join Date: Jun 2008
Location: Tampa, FL
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

Thanx a million guys!!! I`ll try that later today! Whats for dinner??? Baked engine.
Old 07-31-2008, 09:23 AM
  #13  
hspower
Junior Member
 
Join Date: Jul 2008
Location: billingham, UNITED KINGDOM
Posts: 18
Likes: 0
Received 0 Likes on 0 Posts
Default RE: need help removing crankshaft.

lol

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.