I was so mad!

[DarkPhoenix]

Sunday, my friends and I got together to Jam the trucks. Mine wouldn't run for . I tinkered and tinkered and finally got so mad, I kicked my N.Rustler. Hard. Broke the body, body mounts, rim, popped of the air filter, and sent the truck flying. My friends were in shock. It really felt good, and I wanted to do more, but my buddies stopped me. So here is the engine problem. Black goo coming from pipe, and went through 3 glo-plugs in 10 minutes. Inside the glo-plugs, the coil looks like it has been pushed up inside and smashed. Anybody have a clue? I've already been up and down on the lean rich fuel scale, and the truck won't run any better. The truck will run good if I leave the glow igniter pluged in.

[cubalz]

All of the things that you said points to it being set way too rich, I am not too sure about the smashed glow plug thing though. Try leaning out the setting a little, put in a new plug and it should fire right up and not need the ignitor to stay on to continue to run. Perhaps your needle moved from its original setting from vibration or something like that. BTW, next time walk away from the truck when you are frustrated, it costs a lot less than replacing broken parts after kicking it. Best of luck!

[novass468]

I sounds like you may have a bad crank bearing, this will cause debris from the failing bearing to get up on top of the piston and get kicked into the glow plug and crushing it.

To find out if this is what happend first remove the cooling head and see if there is anything on top of the piston, and if there isn't look closely at the finish of the piston and combustion chamber if it's not a smooth machined surface(it may be slightly tarnished) then there was something in there and you should now inspect the crank bearings.

You will have to remove the starter and side of the engine,(this is also a good time to inspect the con rod bushing) after this you will have to look very closely at the inner bearing, make sure the cage that holds the balls inplace is completely intact and that none of the balls are missing, ,make sure you look VERY CLOSE it's easy to miss.

If this is what happend let me know and i will tell you how to replace them if you don't already know, it's not very hard to do, good luck!

[Tazz R/C owner]

possible causes................. reason...
too much compression... from removal of too many shims...
blown crank bearing... it wasn't lubed good enough...
too much fuel in engine... you are running too rich...
detonation and pre-ignition... you are using too hot of a plug...


sources for any other needed info...
http://www.rcnitro.com/articles/glowplugs.asp
http://www.rcnitro.com/articles/nitroengines1.asp

[HiPo]

Can you say anger management classes?

[dustin ward]

Originally posted by HiPo
Can you say anger management classes?
I know I have felt like kicking and throwing my truck before, I managed to hold out though. Good thing becasue it saved me a few bucks in the long run

[Mydustnyorface1]

man that was some kick, but i now wuts wrong w/ the glowplugs, but be4 that i need some help 2. im just a kid in school and i need a science project to do on my truck that wud be fun, notice i said FUN! so give me a good idea, well bak to the subject.....
ur rear bearing is probably blown, mine was doing the exact same thing to the coils, except i didnt kick mine:D dont waste any more money on glowplugs. so happy trails;) but please gimme a good FUN, theres that word fun again, science project to do please!!!!

[The Slacker]

Originally posted by DarkPhoenix
Inside the glo-plugs, the coil looks like it has been pushed up inside and smashed.
Thats exactly the problem that I have and I think thats why my engine isn't starting either....

[The Slacker]

Oh yeah and I have a question also. Since the McCoy MC-59 glow plug (the one i use) is rated for 1.5 volts, is it alright to use the EZ-start, which has a 7.2 volt battery?

[Mydustnyorface1]

it is the bearing, i had to send in the engine bak to traxxas, and thats wut tey told me, and now my plugs ben in for 4 monthst goin on 5

[Mydustnyorface1]

hey slacker,
if u talkin to me........ i dont no im not that smart of a kid call traxxas, 1-888-traxxas:D

[Tazz R/C owner]

The Slacker,
most if not all glowplugs are rated at 1.5 volts...
The box on the ez-start has a capacitator in it (I know, I tore mine apart) and it limits the current flow to about 1.3 volts...

[The Slacker]

Hey uhh do you know where I could get a new crank bearing? anyone?

[JAY4SPEED]

Novass468 cased it. IT IS YOUR CRANK BEARINGS! Same exact thing happened to me a few times with a few different TRX motors. EVERY time it was the bearings were shot! Also the black goo is aluminum particles mixed with the oil. The smashed glowplug is a dead giveaway also. Pull it apart like Novass468 said and hope for the best. TRX engines are notorious for faulty crank bearings.

[novass468]

Traxxas just had a bad batch of bearings for a spell and has fixed the problem , it happend to me twice (two different engines), but hasn't since replacing the bearings , your truck musta just been one of them , this is the bearing part # 4023 ,it includes both inner and outer bearings.

[DarkPhoenix]

Thanks for the input. Hopefully, this will keep me from kicking my truck again. LOL

[putzld]

My crank bearing blew on my engine too, i went through glow plugs like mad too, depending on how old your engine is, you can send it to traxxas under waranty and they will rebuild it for you.