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Old 11-18-2009, 04:14 PM   #1
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Default motor help

I have motors that you can run a tank of fuel at 230 deg. and pull the back plate off and there is a oil film on the con rod but the crank and rear bearing is dry no oil film what so ever. Can some one help me out?
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Old 11-18-2009, 10:16 PM   #2
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There has to be otherwise the engine would both run hot and/or show physical wear symptoms.

When you shut them down, are you running/burning the fuel out, or just letting it idle and then shutting them off?

There is a LOT of windage around the bearing with the engine running and post-shutdown you're only going to see a t-tiny film sitting on the face of the bearing. If you were to let the engine sit, then you should see a very small amount puddle to the bottom of the bearing, below the crank counterweight. This takes a while though.

If you're not exploding bearings or have any signs of wear or other outwardly nasty symptoms, don't worry about it.
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