R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-17-2006, 10:54 AM   #1
Tech Adept
 
TRFTIM's Avatar
 
Join Date: Nov 2005
Posts: 196
Default Nova Mega 12 5 port Turbo Problem??

I have just ran my Nova Mega today and unfortunatley it blew 2 plugs and at the end I seem to not be able to turn the piston over at TDC, the piston runs cleanly in the sleeve, but at the top it is very dificult to turn over.

The piston has obviously had something tapping against it has pitting marks, which probably why the glowplugs went.

Not too sure if I need a new piston and liner though??

Anything else it could be??

Thanks

Tim
TRFTIM is offline   Reply With Quote
Old 04-17-2006, 11:34 AM   #2
Tech Master
 
Join Date: Nov 2004
Location: >New York<
Posts: 1,428
Trader Rating: 10 (100%+)
Default

Tim,
Sounds like your high end needle was set extremely lean. Pitting on the top of the piston and bottom of head button with the loss of 2 plugs is usually a good sign of this.(detonation)
If the glow plug wire didn't score up the sleeve and sides of the piston you can just polish the metal smooth again with some JP polish.

Hope this helps.
Jamie Corrado is offline   Reply With Quote
Old 04-17-2006, 12:13 PM   #3
Tech Adept
 
TRFTIM's Avatar
 
Join Date: Nov 2005
Posts: 196
Default

Quote:
Originally Posted by Jamie Corrado
Tim,
Sounds like your high end needle was set extremely lean. Pitting on the top of the piston and bottom of head button with the loss of 2 plugs is usually a good sign of this.(detonation)
If the glow plug wire didn't score up the sleeve and sides of the piston you can just polish the metal smooth again with some JP polish.

Hope this helps.
Hi Jamie

Thanks for the response!!

I think the piston is ok along with the sleeve its just the button and the top of the piston that pitted, I also think that the motor got too hot due to me not putting enough holes in the bodyshell

With regards to the tight fitting at TDC is this normal as it wasnt like this before.

I hope its an easy affair taking the engine out of a Serpent 705.

Thanks Again Jamie

Ps you wouldnt know per chance if I need Turbo plugs in it?
UPDATE

Just taken the rear cover off and it looks as if the brass bushing that is inserted into the conrod has broken into pieces!! Can I buy just this piece or do I need a new conrod??

Last edited by TRFTIM; 04-17-2006 at 01:16 PM.
TRFTIM is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
F/S: Serpent 835 with Big Block Nova Mega SX15 Engine and Nova Mega exhaust system Solara R/C Items: For Sale/Trade 0 07-26-2007 09:54 AM
Nova Mega Sx12 5 Port Modified Piston & Liner Captiv8 R/C Items: For Sale/Trade 1 12-06-2004 05:10 AM
Nova Mega SX12 RE 5P Turbo MS ?? MugenMTX3Kid Nitro On-Road 1 02-10-2004 01:33 AM
Nova Mega MS Turbo .12 mike_Webb R/C Items: For Sale/Trade 0 10-04-2002 10:49 PM
Brand new Nova Mega SX-15 turbo 7 port EV-4 #2606 rleong R/C Items: For Sale/Trade 0 03-24-2002 09:23 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 05:36 AM.


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