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Originally Posted by MobilOne
You mentioned a grinding noise when you accelerate the sub-optimal Honda. Could it be a very mild spark knock? Cavitation in the torque converter? Dry axle cv joint? I'm trying to think of what could cause a grinding type sound when accelerating.
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Sounds like it's inside the cylinders while firing, but not a ping like I've heard in the distant past with other cars.
Between 2nd and 3rd gears, especially when going up hills and accelerating - the harder the acceleration, the more it happens. It's independent of the grinding.
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Does the tach bump up when you hear the grinding?
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No.
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Do you drive with one foot touching the brake?
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Nope, never have.
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Does anything else occur when the grinding sound happens?
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No.
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When one accelerates, the engine torques backward (top of engine tries to move toward the firewall). Could this action be causing something to rub, such as a pulley?
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No, this sounds internal, in the firing cylinders.
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It might be worthwhile to check the engine mounts. Perhaps one was left loose when the camshaft belt was changed? You can tell; the grinding noise bothers me. Especially since no one else has addressed it.
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I wonder if the timing is actually retarded? Could it do that?
Well, I've ordered a timing light ( couldn't find my old one ) and it should be here in a week.