jord_trx2.5

my tmaxx 2.5 was running great and sudnly died, i took the glow plug out and seen chunks of metal on top of the piston, when i opend it up this was what i found, any1 know what could of happened.........

jord_trx2.5

should of mentioned... i lined the blown piston next to another piston thats the same for u too see the amount missing

alvinl

You had a twin cylinder? lol, just joking. By the discoloration it looks like it might have run hot. What does the top of the piston look like?

Edit: Darn, you added clarification as I was typing. Kinda makes my joke less funny.

jord_trx2.5

lol no not twin cylinder, top of the piston has no damage but is brownish black

alvinl

I had a really hard time keeping the temps in check on my 2.5r and eventually swapped it out for an OS .18TM. I am sure others will chime in, I am by no ways an expert on glow motors.

Bnecaise74

cheapest place i found to get a piston was rc superstore. javascript:mox();

jord_trx2.5

does anyone know why this might have happend, i didnt think it could have smasshed to bits like that just from running hot, i thought it was tuned well had plenty of smoke ect.. im in the middle of sortin a piston and sleeve off of ebay i just want to know what went wrong to try an stop it hapening again. i thought that it may have hit something on its why down, i dunno what though, because it just died all of the sudden out of knowhere

Snook Man

Excessive heat and rpm's cause the piston skirts to break...

jatoracing33

As dark as that is it looks like you were simply just running it really hot. Did you use a temp gauge? It's handy to have one around to make sure that it isn't overheating.

jord_trx2.5

nah no temp gauge, havent got around to gettin one of them yet, i am going to tho before i put a new piston and sleeve in, what temps do i want to be aiming for when its running, what is the ideal temp and wat what would you say max temp was ?

lirevo

the same thing happend to my 2.5r revo i found a new piston and sleeve for 42.50 on http://www.horizonhobby.com/Products...32X#reviewsTab just click the link. also do you know the difference between a medium and long glow plug.

jatoracing33

I like to run my 3.3 at around 210-240F. Although I have heard that some of the TRX engines like to run hot. whatever gives you the best performance. I would say no hotter than 300F. Now if you had good smoke, yet it was running hot enough to do that, then you may have an air leak. I would suggest sealing your engine when you put it back together. Also, there is no doubt in my mind that you hurt the connecting rod, too; it's just as daark as the piston. You may want to consider replacing that.

jord_trx2.5

cheers for all the info. i have another rod for it thats seems ok, its the rod on that piston next to the blown one in the pictures i posted. do you think that will be ok to put on with a new piston and sleeve?

(LIREVO) thanks for the link, but dont know the diference in glow plugs long and medium, i just by medium.....

lirevo

im buying a piston and sleeve today and im gunna use the same rod but i dont think my pin that holds the piston on the rod is good, idk what to do

Snook Man

If in doubt of the rod and/or wrist pin they should be replaced...

lirevo

i threw it together and it didnt look damaged at all i couldnt tell when it was on there. i was breaking my new piston and sleeve in and my batteries died and the very end of the first tank and it is now dark do you guys think itll hurt it if i wait till tomorrow or the next day (its supposed to rain tomorrow) to do the 2nd-5th tank. i think not because it has to cool down all the way before you can do the 2nd tank so i was thinking that it would be like it was cooling down. idk tell me what you think

revel67

Whoooa!!! for a moment I thought Sirio release this baby!!!! Lol.

lirevo

thats sick