over heat !!!!!

ok i know this is a brushless website, but there's got to be a few nitros in here......

so this morning i went out to the beach with my son and granny.....
my t-maxx was running perfect.... between 190 f and 210 f.... when i got home, i cleaned most the sand and gunk off and ran it again.... running good around 200 until i busted the gas tank attempting a backflip......

ran to hobby shop, get new tank, remove and replace..... run it like 5 min. and its cuts out, smokin, check temp...... HOLY $H!T !!!!!! 318f

any suggestions?

[Mike.L]

Yes i've had a nitro but never ever runned on high temps.
this is a kind-of strange story.
was that gas tank the same amount in "cc's"?
was that replacment tank the same one as the one you broke?

because if its a lager gas tank then it must have ran longer then the motor was used to.

But!
if its the same stock replacment gas tank than that is going to be hard to find out whats the cause of 300degrese F
wow thats hot!

[HotnCold]

i have the revo with the 2.5R motor - 200 is too low of a temp - Did she shut off because of high temp - Did the idle race up and down before shutting down ? - i know that temps are ok when in the upper 200's - 300 is a bit high - i would say recheck all connections - make sure you didnt put a small hole in the fuel tubing - take apart stretch and plug one end and blow into the other - both lines from tank to pipe and tank to motor. Make sure your carb is not loose - make sure that you have no exhaust leaks - that will make you run lean quick. Do a once over on her - and retune it for about 260 or 280 - try that and keep an eye on it - I also had a problem with my RB .21 motor - the rubber gasket on the high side needle valve went bad - kept screwing in - hotter hotter - till we figured it out - check and make sure this is not a problem.. Youll figure her out....

ok, i went over the fuel tubes, checked the exhaust for clogs, checked every motor bolt for tightness/leaks, changed glowplugs to a new one, checked carb for previous setting i made on it, yada yada yada.......

the fuel tank is the same type (stock t-maxx)

started it up and within 2 quick high speed passes it bogged WAY DOWN, idle slowed WAY DOWN, then cut off, i immediately checked temp....... 345f......

all this within less then 2 minutes of start up.....


im about this close to calling it quits with NITRO already !!!!!!

[squeeforever]

sounds as-though you might have gotten sand in the motor and ruined the sleeve and piston. i had a similar problem when my airfilter came off on my revo. it wasnt as sudden but it didnt take long for it to come about as a major problem. it would be kinda hard to start, then i would get it running, make a pass or two and then bring it in for adjustments and as soon as i let off the throttle it would die. pull the head off and and see what you can find. also, roll the flywheel with your finger. if you dont feel any kinda pinch then you dont have any compression and its time for a rebuild.

well, its still got the "pinch" and i can hear the slight pop through the eshaust from the compression......

i guess ill just have to do a full tear down and see what i can find out.....

mom's in town so im taking a break for a couple days though.... and i should get my new FLM part in tomarrow for my rusty/stampede project also, gonna try something new with that and if it dont work, then i just wasted the money on the stampede chassis and braces....

[J Cates]

Check for holes in the fuel tubing.

Originally Posted by J Cates

Check for holes in the fuel tubing.

thats the first thing i did.... im just going to have to tear apart the motor and carb and to a full inspection, but ill start that tomarrow after work...

[Mike.L]

are you getting any vetaltion in the body?
or did you run the truck without a body?

i did recently switch back to the stock body..... i was running the HEMI body with windows cut out, i didn't even think of that....

guess i should try cutting the windows out of the truck body or fix my HEMI body so it will work again...

[Mike.L]

lol try that! and also take appart your engin and see whats the problem

[RC-Monster Mike]

It sounds like an air leak to me, but I wouldn't rule out sand in the motor either.

[Ozark-al]

I think we can all agree that this is an air leak of some kind. It seems that you would have to run with the filter off to get sand in the motor but that is a possibility. It sounds like your on the right track checking the engine for sand and checking for air leaks. Don't give up on Nitro, just have a brushless system for backup like me when I get fustrated with Nitro. Good Luck.

been VERY busy with work lately, too tired to work on RC when im getting home this week, so i haven't torn into the engine yet, but i did find out one thing............:013: broken motor mount !!!

[JOHNNYMAXXIMA]

Is it possible for an engine to get hot if the clutch berring goes out? That might be something to check in to.