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Is my motor blown?
- Thread starter 2 steppen
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No, when you're motor needs to be replaced you'll know.
tim-rachel
RCTalk Talkaholic
i would not worry about it
darkslayor24
RCTalk Addict
just take the engine as far apart as you can, and soak it in fuel with a couple drops of after run oil in. soak it for a couple hours and check the parts status
(there may be some rust)
(there may be some rust)
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Oh my goodness people!?! Are you serious? C'mon, seriously. Did it not occur to anybody who is an "experienced r/c driver" that the tightness he is feeling is simply the compression?
2Steppen - What you are feeling is the very end of what is the engines compression stroke. It's supposed to be hard to move in that little spot. This is the point in the engines revoluti0n that all ports are closed yet the piston still has a little bit of movement up into the compression chamber. Not only does the piston sleeve fit tighter around the piston at this part of the stroke but you are also compressing air. What you are feeling is what you want to feel in an engine, not what you should shy away from.
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Cyclop3000
RCTalk Racer
Just a silly question, and sorry to somewhat derail the thread, but then soaking parts like this in fuel, could I use expired fuel? I have 3/4 of a gallon of fuel that's 4 years old, and I'd like to use it for stuff like soaking...I know I should not use it to run the truck, but would it be ok for soaking/cleaning?
Thanks!
No! Nitro fuel will absorb water.
taz1175
Gone - bye bye.
:goodpost:
Yeah and so what's wrong with him just using it for simply soaking his parts in, it would be just like soaking your car parts in a bucket of carb cleaner to clean them!
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BradZ
RCTalk Talkaholic
Definatly not blown. Just thought i reinforce the overall opinion. If you can move it round a lot, and easily then shes gone. Little bit of play is perfectly normal. Why you selling the firestorm anyway? You better replace it!! :
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Remove the glow plug. If you can't turn it all the way around with the plug removed, THEN you have a problem.
Tmaxx96
Gone - bye bye.
yeah it is just the compression garunteed but if I'm wrong let me know is the engine new or is it worn a little bit ?
lol...wow...in summary, if your piston is up on commpression it may be difficult or even impossible to turn by hand with the glow plug in and depending on just air or a little fuel in the cyclinder. It won't, or shouldn't turn the opposite direction due to the one way bearing stopping it.
first, remove the glow plug, if it is still hard to turn, particularly if it was left sat with the remaining fuel not being purged from the case and cylinder with a decent oil, then you may have a little bit of corrosion causing the binding. You COULD just try adding a few drops of oil to let sit and see if it loosens up but your best bet would be to disassemble and thoroughly inspect your mill. A little time to disassemble, inspect, clean and reassemble your engine may be all it takes to save it. If there is corrosion and you just oil soak it to free it and then run it...those little bits of corrosion are going to come unattached from where they are and end up in places you dont want them.
first, remove the glow plug, if it is still hard to turn, particularly if it was left sat with the remaining fuel not being purged from the case and cylinder with a decent oil, then you may have a little bit of corrosion causing the binding. You COULD just try adding a few drops of oil to let sit and see if it loosens up but your best bet would be to disassemble and thoroughly inspect your mill. A little time to disassemble, inspect, clean and reassemble your engine may be all it takes to save it. If there is corrosion and you just oil soak it to free it and then run it...those little bits of corrosion are going to come unattached from where they are and end up in places you dont want them.
cheeseball01
RCTalk Qualifier
Um, can't you just fire it up and show the guy that it runs?
Also, to answer the question about why the guy shouldn't use old fuel to soak parts in, is indeed because it evaporates and creates moisture, which is bad, bad, bad for engine parts. This is the entire reason we after run our engines. To get rid of any fuel that's still in the motor, that will attract moisture and destroy our engines.
Also, to answer the question about why the guy shouldn't use old fuel to soak parts in, is indeed because it evaporates and creates moisture, which is bad, bad, bad for engine parts. This is the entire reason we after run our engines. To get rid of any fuel that's still in the motor, that will attract moisture and destroy our engines.
taz1175
Gone - bye bye.
Yeah, I understand that, but if you just use it to soak them and then clean them and let them dry or dry them before you put it back together and then use some ARO or WD-40, shouldn't it be O.K:\.....or not ?:shrug:
cheeseball01
RCTalk Qualifier
Wouldn't chance it ya know? That's why you don't leave the lid off your fuel bottle or filler bottle for any longer than you have to. It collects moisture so quickly. If you're soaking parts in it, it will create water in a very short time and then you're soaking your parts in part fuel, part water. Just use some Nitro cleaner and that way it's not a concern.
