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Old 01-24-2009, 05:37 AM   #1
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Default Cold weather break in

Hi

I was just wondering if I could break my engine in in cold weather and maybe some tips on how to do it? For reference its going to be hight 30's all week.

Thanks
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Old 01-24-2009, 07:16 AM   #2
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anyone
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Old 01-24-2009, 07:34 AM   #3
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I was trying to think of a good way but i have never had to break in an engine in those temps.

Surely preheat the engine to about 175-200
Wrap that sucker in as much foil
After you get it started put a cut thick sock over the head and also try to run with the body on to trap more heat on the inside.
If you can keep temps at 175-200 you may be ok.

oh and while idling the first tank or two i guess you can leave the heatgun on the case, unless you have a hobbico heatgun, it will break!
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Old 01-24-2009, 07:34 AM   #4
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breaking in an engine in the extreme cold is bad. It puts a lot of stress on the piston, sleeve and rod.

Something you could do is to set up a heat lamp on a table in the garage over the top of your car. Wrap the head in alluminum foil or a rag so it retains heat. Pre-heat the engine to atleast 150 degrees using a heat gun or hair dryer before trying to start it. Then start the engine and keep the temp in the 200 degree range. Run it for about 5 minutes. Shut it down and make sure the piston is at the bottom of the stroke. Let it cool down to less than 100 degrees. Do that about 10 times and your engine should be broken in.

Just a tip, don't get impatient and run a new engine in the cold weather without pre-heating it and properly breaking it in.
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Old 01-24-2009, 07:39 AM   #5
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Ya I know I wont rush anything but if I can do it correctly can it be done? Also for the method above what throttle should I keep it at. 1/4 at first and slowly vary the throttle more? During each five minute cycles should I be checking temps to be sure its keeping around 200? If its not can I lean it out a little or is that bad too?
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Old 01-24-2009, 07:42 AM   #6
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Personally, I'd wait until it gets warmer , unless you have an indoor track to run at, then go ahead with either of the 2 methods mentioned above.

Make sure it's at least 150f before starting ( not just the engine head, but the block too, warm the ENTIRE engine up) and at least 200f when running with a steady oil drip coming from the exhaust pipe ( then you'll know it's not too lean)
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Old 01-24-2009, 07:44 AM   #7
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what temp. do you guys think is warm enough?
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Old 01-24-2009, 07:46 AM   #8
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Quote:
Originally Posted by rgrassey@me.com View Post
what temp. do you guys think is warm enough?
For breaking in an engine? I"d say at least 50f outside. They will run below that temp, but tuning becomes a pain.

Have patience, you'll appreciate it in the end.
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Old 01-24-2009, 05:36 PM   #9
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Try to wrap your head in something like a paper towel or a rag. And make sure the motor is at room temp when you start it. Try and keep the motor between 200&215 degrees. In colder weather by itself it will run around 165-185 so definatly wrap it.
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Old 01-24-2009, 05:39 PM   #10
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Ps. Dont lean the engine out. Its risky.
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Old 01-25-2009, 02:03 PM   #11
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Ok so if i cant get it to 200 at factory needle settings wait until it gets warmer?
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Old 01-25-2009, 03:07 PM   #12
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iv ran a few engines in with same temps or less outside and had fine results. made sure drops were coming out exhaust and temps were good around 200. used heat gun at times and foil. body on was a good suggestion hadnt done that but the rest is been working. if i do see the weather is gonna break il wait a few days but lately your 30 degrees is better than my 20-25 degrees. if you have a small air leak youll hold temps up too lol
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Old 01-25-2009, 03:31 PM   #13
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ok im gonna go for it and i'll let you guys know.
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Old 01-25-2009, 03:39 PM   #14
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Quote:
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ok im gonna go for it and i'll let you guys know.
Do you already have the truggy?
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Old 01-25-2009, 03:47 PM   #15
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its coming tomorrow, but i have everything i need to get it running and my total came out to be about 430 for evrything!! i'm excited!
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