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Old 05-06-2017, 01:48 AM   #1
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Location: Maryland, Near DC, USA
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Default Giving my HPI MT2 an overhaul

My MT2 is my cold-weather nitro truck, and this past winter was the second winter it was in-service. It was time for an overhaul, because two winters was enough torture for the original ball-bearings to endure. The engine got a thorough scrubbing on the outside and oiling on the inside, to get it ready to sit on the shelf for months. Here's what I found when I opened it up:



That's a nice happy color for the inside of an engine.

The engine got a ceramic front crank bearing last winter, because the original steel bearing rusted from exposure to snow and road salt, but other than that the engine hasn't gotten any mechanical maintenance since I put it into service two winters ago. I add 43mL of pure castor oil to each gallon of fuel to raise the oil content from 11% to 12%, I'm fastidious about checking the engine's temperature and keeping it within +/-20F of the 210F target I decided on (it runs in freezing weather, so the target temperature has to be lowered to prevent accidentally oil-starving the engine), and it gets a few drops of after-run oil any time it will sit more than a couple weeks. Other than that, I just had fun with it.
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