sonik

i have a new jp fx 3 12 in my mugen mtx3, i didnt have a batt for the car so i started the break in procedure on idle for 4 tanks ,and the next time i was out running i could finish it off when i get a batt, so i put after run oil in it and left it, but when i did finally get another chance to run it i noticed the flywheel was stuck. so i heated it up to free it up a bit with a hair dryer. then when i moved the flywhel it felt grainy as if there was dirt in the engine, on opening it up i was shocked to see brown sludge all over the place, i used o'donnel 20% and proper afterrun oil, i was advised to soak the engine in petrol/gas so i did and it has'nt really helped, i think its gone rusty in there now , i dont know what to do ? this engine was brandnew ...

i have run in race engines before in exactly the same way and all was ok,

heres some pics , ps, i dont have receipt as i bought it privately , so i cant send it back to manufacturer,

any help would be greatly appreciated ,

SManMTB

That's rust!!!!

Did you clean out the engine before storing it? Nitro is corrosive.
Looks like you got some condensation going there on top of it.

How long was it since you ran it?

snowbl!nd

I think the engine is toast, there is rust in the bearings and they will quickly disintegrate when you run the engine. Water must have got in the engine (what did the engine look like BEFORE you ran it?) and just rusted it away.

killer89

My Feedback: (-1)

how long did you wait???

SManMTB

It's probably not completely toast BUT it will take time getting it up and running.

Disassemble and clean. Rod, piston, liner, crank could be OK but will need a lot of TLC.
Get new bearings, wrist pin + clips. Clean crank case and assemble again.

sonik

very good advice thanks ,
most people saying throw it away lol,
i am gonna clean it up, problem is i cant get the liner out , i have tryed heating it with a hairdryer, but its still to tight wont move a bit,

sonik

about 2/3 weeks , cant remember properly ,

sonik

i opened the engine backplate when i got it and it was definetley brandnew ,

SManMTB

Leave it in something that dissolves rust for a few days. WD40 might work. Rinse and redo as needed.
Go from there. Don't try to turn it or use any kind of violence to turn it over.

spokman

My Feedback: (2)

That's insane! Do you live in a humid area? 2-3 weeks is nothing. I've left mine for mos before..

gubbs3

My Feedback: (1)

That engine will definately need:

Bearings
Crank
Rod
Piston
Wrist pin
Sleeve

If that is less that the cost of a new engine then rebuild. I would imagine that number of parts would be at least coming close to a new engine. With the price engines are, I wouldn't rebuild one for more than 50% of the cost.

jkulhanek

Ok

For starters you will need:

-New front and rear bearing, they are unsalvageable.

-New Piston pin & circlips.

Is the liner FREE from any corrosion? It shouldn't be corroded, but if it is, you will need to turf it.

Get some 2000 grit sandpaper and use it to "polish" off the rust on the crank. DO NOT SAND THE CRANK PIN, PLACE A PIECE OF FUEL TUBING OVER IT, if the crank pin has rust on it, forget it and buy a new crank, the tiniest little pit/scratch on a crank pin will eat rod bushings left, right and centre.

Clean the rod with a scouring pad, and check that the oil holes aren't filled with rust.

IMO you are probably better off buying a new engine, and keeping this one for spares.....

Crusty

Personaly I would toss it in the bin, How long and where was it stored?, looks like its been left in a puddle for a couple of weeks

smokingcrater

add to the list of replacement parts the seals for the engine. they aren't generally rated for gasoline, they are probably damaged at this point.

tik

do u have any lil brothers or sumone dat u know dat could of done dat
maby sumone did dat on purpose