R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-08-2008, 07:09 PM   #1
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default front bearing issues

Hey All,
One of my OS Speeds may have a leak in the front bearing. I noticed it to have decreased power and increased temps my last race and when putting after run oil in the motor it did seep srom the front bearing. Just wanted some thoughts.
Thanks,
Kane
__________________
rcdepot.us
nxgraphics.ca
Kane-o is offline   Reply With Quote
Old 07-08-2008, 07:15 PM   #2
Tech Elite
 
jamminnay's Avatar
 
Join Date: Apr 2008
Location: IL
Posts: 2,012
Trader Rating: 10 (100%+)
Send a message via AIM to jamminnay Send a message via MSN to jamminnay
Default

the bearing is probably going bad.. how many gallons does it have on it?
jamminnay is offline   Reply With Quote
Old 07-08-2008, 07:43 PM   #3
Tech Champion
 
Davidka's Avatar
 
Join Date: Oct 2004
Posts: 9,842
Trader Rating: 75 (100%+)
Default

The bearing could be going bad but keep in mind that the front bearing seal is not air or water tight. If there is an excess of oil in the engine it can leak out the front bearing. If the bearing is bad it should be easy to tell. Remove the plug (better yet, the piston and sleeve too) and turn the crank. Also wiggle the crank side to side to see if any play has developed.
Davidka is offline   Reply With Quote
Old 07-08-2008, 11:21 PM   #4
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default

2 gallons on the motor, but I did put an excess of after run oil in the motor which could explain the issue.
Thanks,
Kane
__________________
rcdepot.us
nxgraphics.ca
Kane-o is offline   Reply With Quote
Old 07-09-2008, 03:19 PM   #5
Tech Elite
 
ezveedub's Avatar
 
Join Date: Aug 2004
Location: Fort Lauderdale, FL
Posts: 2,411
Trader Rating: 14 (100%+)
Send a message via AIM to ezveedub Send a message via Yahoo to ezveedub
Default

Excess after run oil always seeps out of front bearings. Second, if you run that engine rich or on high oil content fuel, it will sweat oil from the front bearing and rear case cover. Once you run lower oil fuel or lean it to race tune, that disappears. Now as for your engine, it should run strong at 2 gallons, unless somoething has gone wrong. I haven't had or seen a dud Speed yet so far that I have tuned, but there can be issues with any engine.
__________________
Kyosho, Mugen Seiki, Maxy's Fuel, KO Propo
O.S., Ninja JX, Novarossi, RMV
ezveedub is offline   Reply With Quote
Old 07-09-2008, 03:59 PM   #6
Tech Initiate
 
losimark's Avatar
 
Join Date: Sep 2007
Location: Citrus Hieghts CA
Posts: 31
Default

If you clean the motor with any liquid or spray when its dirty sometimes the dirt will seep in and ruin the seal , bearing , piston & liner.

http://www.fthobbies.com
__________________
www.fthobbies.com
losimark is offline   Reply With Quote
Old 07-10-2008, 08:21 AM   #7
Tech Addict
 
slow coach's Avatar
 
Join Date: Oct 2003
Location: guernsey C.I.
Posts: 626
Default

best to check bottom of case, i had what i thought was a leaky front bearing and it was running hot turned out it was a small hairline crack in the bottom of the case.

sorry should add this was the standard v-spec not the speed but symptoms sound similar.
__________________
Kyosho MP9TKI2 soon to be TKI3, Novarossi, SMD, GM Racing, www.grccc.org
a great wife and lovely kids
what more can you ask for
a win on the lottery :D
slow coach is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
os18tz front bearing spudly12 Nitro Off-Road 1 09-11-2008 11:53 AM
V-Spec front bearing issues Jonro Nitro Off-Road 35 09-06-2008 10:04 PM
Airleak front bearing??? J.Gonzalez Onroad Nitro Engine Zone 8 08-12-2008 03:13 PM
Front Bearing Jason Halvorson Nitro Off-Road 12 08-12-2007 04:09 PM
front bearing nitro maxx90 Electric Off-Road 3 10-30-2006 07:56 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 10:53 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net