R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road > Offroad Nitro Engine Forum

Thread Tools Search this Thread
Old 05-18-2011, 03:12 AM   #1
Tech Rookie
Join Date: Jan 2011
Posts: 6
Default Front bearing bad?

I've been having issues with my losi burning plugs since I bought it (march this year) and I was told it could be a airleak, and I find a massive leak coming from my front bearing....so I strip my engine and I find that I can clearly see light through my bearing, is this normal

I would post a picture but I'm not allowed yet
Johnny5ive is offline   Reply With Quote
Old 05-18-2011, 03:19 AM   #2
Tech Elite
morgoth's Avatar
Join Date: May 2010
Location: Belgium
Posts: 2,518

I think you can post pictures or links because it's against spambots.

Upload the picture somewhere and post the picture here with http://www. removed from the link.
Serpent BeNeLux teamdriver // FX Engines // Nitrolux fuel
My blog: http://scrubbingspeed.wordpress.com
morgoth is offline   Reply With Quote
Old 05-18-2011, 06:50 AM   #3
Tech Elite
Join Date: Mar 2009
Location: Aurora, Colorado
Posts: 3,718

I would think - if you can see light coming through then yes - its not good.....
TLR - Spektrum - Horizon - TLR 8ight 4.0 - TLR 8ight-T 4.0 - TLR 22 4.0 - Orion - Sweep Racing Tires
token is offline   Reply With Quote
Old 05-18-2011, 08:31 AM   #4
Tech Adept
Join Date: Jan 2009
Location: Alexandria,KY.
Posts: 105
Trader Rating: 1 (100%+)

Sounds like the bearing is toast...

When I suspect a front bearing is going south and the engine is still together. Get your electrical motor spray out,contact cleaner or whatever you have, put the straw on it and while it is warmed up and idling try to spray behind the flywheel.Not a long blast, just a short little blip of spray, if it kills the engine instantly then your front bearing is letting junk in and needs to be replaced.

Hope this helps in the future
Sholler is offline   Reply With Quote
Old 05-18-2011, 08:09 PM   #5
Tech Master
j_blaze14's Avatar
Join Date: Feb 2008
Location: Tampa, Fl
Posts: 1,693
Trader Rating: 34 (100%+)

what motor? also, define burning plugs, i think they are supposed to burn. a bad tune will shorten plug life, overheating and rod wear. if the front bearing is bad tuning will be erratic, mystery flame outs and high temps even with good smoke. the sealing for the front bearing is not at the front shield its at the inner rim/crank/case gap. make sure flywheel nut is on tight.
aGama A8 EVO - Werks B2 - Sidewinder
aGama A8E - TrackStar 150a, 2560kv, 3 and 4 cell
FlySky GT3B, Turnigy HV servos, SKY Lipos
AKA, Proline, Hotbodies Rubber
Elite Performance - HORRC.com
j_blaze14 is offline   Reply With Quote
Old 05-19-2011, 07:58 AM   #6
Tech Elite
Rcrenew's Avatar
R/C Tech Elite Subscriber
Join Date: Jun 2010
Posts: 3,027
Trader Rating: 9 (100%+)

If you can see daylight thru the bearing, change it. Even if its not the only cause of your tuning issues which it is most likely part of it . It will allow dirt / dust to get in.

RcRenew.com engines, modding and rebuilding

Triton RC- Ultra high performance racing engines
Rcrenew is offline   Reply With Quote
Old 05-20-2011, 08:58 PM   #7
Tech Master
Join Date: Dec 2008
Location: In a house
Posts: 1,115
Trader Rating: 7 (100%+)

Originally Posted by Rcrenew View Post
If you can see daylight thru the bearing, change it. Even if its not the only cause of your tuning issues which it is most likely part of it . It will allow dirt / dust to get in.

+1 also a sure sign of a bearing failure is it constantly burning out glow plows as well. ALSO a bearing issue can cause a harmonic vibration that will cause the cooling head fins to break loose from the head as well. I know on my TRX motors when I see the first crack or sign of a cooling fin starting to come off then I replace the bearings. This goes for my race 1/8 motors as well.
I'm a little teapot!
bobbyc1127 is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Air leak front bearing. What to do? bacchus Nitro Off-Road 26 07-29-2010 09:26 AM
Air leaks in front bearing, normal? Cannondale1974 Nitro Off-Road 6 06-16-2009 07:39 AM
front bearing issues Kane-o Nitro Off-Road 6 07-10-2008 09:21 AM
Front Bearing Leak NEMESIS44 Nitro Off-Road 11 04-19-2008 08:21 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT -7. It is currently 08:47 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net