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Old 10-08-2013, 12:43   #1
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oil problem

i just overhauled my cummins 6bta b motor. i'm not getting oil from the oil pan to the oil pump, i swapped out oil pump but still no oil, any suggestions before i pull motor again?
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Old 11-08-2013, 05:18   #2
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Originally Posted by kent nakachi View Post
i just overhauled my cummins 6bta b motor. i'm not getting oil from the oil pan to the oil pump, i swapped out oil pump but still no oil, any suggestions before i pull motor again?
Check out priming a oil pump something like this. Worth looking into
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Old 11-08-2013, 10:44   #3
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Re: oil problem

As you've changed out the oil pump. Either there is a blockage in the oil suction line or an air leak in it. Could also be a blockage down stream of the pump. Hows your oil pressure relief valve. Also verify that your oil pressure gauge is correct..
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Old 11-08-2013, 10:55   #4
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Re: oil problem

There is a grill filter at the oil suction from the pump? but i guess you check that ...
With the valves head cover out and engine runing , you see oil splashing around valves ??
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Old 11-08-2013, 11:21   #5
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Re: oil problem

I vote for an air leak on the suction side. Generally speaking a positive displacement pump doesn't need priming unless the pump is badly worn. If the pump was a new install and pre oiled it should do the job.
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Old 11-08-2013, 12:39   #6
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Pre oiled is the key. Could be air leak but the pumps won't prime if they are completely drained and dry.
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