Engine Break In

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
D

DanSpd

Well-Known Member
Messages
360
Reaction score
0
Basically do you have to break in the engine when you change:


(a) cylinder


(b) piston


© cylinder and piston


(d) crankcase


(e) crankshaft


(f) crankcase and crankshaft


Thanks
 
I personally only run mine short time midway maybe 1/4 of a tank then it's wot to get the engine hot to seat the ring. then i start tuning.
 
I do mine totally different, but everyone has their preferences ;)


I do the 3 tank break in process.
 
Umm not really what I asked for... but still good.


I know you have to break in the engine and I have my way of doing this.


But what is being affected during break in process?


I changed just cylinder yesterday and obviously dono if I should break in the engine again or no..
 
I kinda do mine like Obeast. 4 tanks nitro style 1:1/4 throttle less than 5 seconds, 2: 1/2 throttle less than 5 seconds, 3:3/4 throttle less than 5 seconds, 4:full throttle less than 5 seconds, then TEAR IT UP like normal. Or something like that! Works for me!


Side note: I read that gas rc engines don't need break in so Ive also tried that and it also worked with no problems for me BUT I don't use that method anymore because I figured its worth the peace of mind to be kind the first 4 tanks.
 
Anytime you change the ring, you have to re-seat it. The ring has to wear against the cylinder to make a seal.


The other components you were asking about do not need break in.
 
Gotcha rob. Only break in when changing cylinder or piston or both.


Also yea I read that you don't have to break in the gas engine since you never break in your weed wacker, etc.


I do mine on 2 tanks.


Tank #1 First half: 1/4-3/8 for less than 5 secs


Tank #1 Second half: 1/4-1/2 for about 5 secs


Tank #2 First half: Mix of half and full throttle


Tank #2 Second half: Basically just bashing


Works well so far.


Thanks
 
I worke dfor Ryobi as a Manufacturing Engineer and we broke in the engines for you. 9 minutes of loaded/no load. I had to develop engine stands to run 60 engines in a booth at a time. By the time the engine was done the ring was seated enoguh to run normally for the backyard guy with no skills.


I had the chance to go to the Stihl factory and it was fully automated with robots doing all the work on automated conveyors. Cool stuff, but thats why their stuff is so expensive.
 
The 3 to 4 tank think is really only needed on nitro since there is no ring and cylinder is tapered as engine get hot cylinder expands so if you just gas it all your doin is grinding down the piston i tried the few tank brake in on my first engine and ended up with so much blow by i didn't have much compression so now i just put some assembly lube in it when i build then run half throttle till it gets up to a decent temp seems to be workin great.
 
@Rob:


Wow I didn't now that for sure. Also since you noted that those engines are being broken-in in factory then there is a chance that regular engines from redcat, etc are broken in as well.


Reminds me that my head&piston kit came kinda used.


I guess there is nothing much to worry about except good tune.
 
RampageHopUps said:
I've never heard of RC engiens being run in before they ship. I serioiusly doubt Redcat breaks in the engines.
Click to expand...
Well I do not know for sure. Ordered a head kit from ddm for $20.


Looks like the engine was run. So it's up to factory or ddm.
 
Back
Top