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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 09-30-2006, 12:34 AM   #1 (permalink)
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replaced engine

I replaced the engine in my 87 325es and cant get it to start. I latter found out that there was no ground wire connected. So I attached a thin gauge wire from the top of the engine to the bolts to the shocks and the engine turned but did not start. So I can get it to turn but not start now. where does the ground go on these cars?
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Old 09-30-2006, 03:15 AM   #2 (permalink)
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That should be fine but the ground needs to be at least a 10 gauge wire, something like an 8 gauge is safest.
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Old 09-30-2006, 09:16 AM   #3 (permalink)
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You probably just lost pressure in the fuel lines from the time the old engine was out to the time the new engine went in. Try filling the filter and go from there.
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Old 09-30-2006, 12:15 PM   #4 (permalink)
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But where would be the strongest connection?used: Is there supposed to be more than 1 ground?used: where should it be mounted? used:


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Old 10-01-2006, 11:30 PM   #5 (permalink)
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One ground, mounted at the oil pan on the drivers side below the alt.
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Old 10-04-2006, 08:26 PM   #6 (permalink)
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Connected the ground from pan to chasis.

I connected the ground like you said from the pan to chasis and the car finally cranks. Thanks. But know Im not getting any fuel in the line in on top of the engine so its not starting. The reason could be when I took the engine out I cut the wire harness which is located on the fron passenger side going in the fire wall. So I had to reattach with the new engine. Does that harness have any wire going to the fuel pump? If so which one? By the way car has been sitting for 1 1/2 years.
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Old 10-05-2006, 03:28 PM   #7 (permalink)
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Connected the ground from pan to chasis.

--------------------------------------------------------------------------------

I connected the ground like you said from the pan to chasis and the car finally cranks. Thanks. But know Im not getting any fuel in the line in on top of the engine so its not starting. The reason could be when I took the engine out I cut the wire harness which is located on the fron passenger side going in the fire wall. So I had to reattach with the new engine. Does that harness have any wire going to the fuel pump? If so which one? By the way car has been sitting for 1 1/2 years.
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