'00 302 Engine Vibration
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'00 302 Engine Vibration
I have been picking at an engine vibration for more than a year.
I have a '00 Explorer 302 V8 installed in an '82 Volvo. This engine/transmission has not been abused and only has 15k miles since it left the Ford factory. It was found intact on a pallet in dry storage. Everything was there as from Ford from the fan to the transmission output bushing. There is an engine vibration beginning about 2000 rpm in PARK so the problem is not in the transmission or drive shaft.
Perfectly smooth at idle and until you approach the start of the vibration.
Replaced the viscous clutch mechanical fan with duel electric so it isn't an out of balance fan.
Pulled the serpentine belt this afternoon and still have the vibration. Might have been a little less and I did find a idler pulley that had a little rattle but the big vibration is still there with only the harmonic balancer through torque converter rotating. Replaced the pulley. Nothing else changed from when Ford built it.
No OBD codes.
Suggestions appreciated.
I have a '00 Explorer 302 V8 installed in an '82 Volvo. This engine/transmission has not been abused and only has 15k miles since it left the Ford factory. It was found intact on a pallet in dry storage. Everything was there as from Ford from the fan to the transmission output bushing. There is an engine vibration beginning about 2000 rpm in PARK so the problem is not in the transmission or drive shaft.
Perfectly smooth at idle and until you approach the start of the vibration.
Replaced the viscous clutch mechanical fan with duel electric so it isn't an out of balance fan.
Pulled the serpentine belt this afternoon and still have the vibration. Might have been a little less and I did find a idler pulley that had a little rattle but the big vibration is still there with only the harmonic balancer through torque converter rotating. Replaced the pulley. Nothing else changed from when Ford built it.
No OBD codes.
Suggestions appreciated.
Logistics Pro
Joined: Jun 2009
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From: Cedar Rapids, IA
Is the vibration only present when in Park, or can you notices it when in Drive as well? If only in Park, are you sure this isn't an over-rev protection system disabling the fuel? Will the engine rev past that point, or once it starts to vibrate, that is as fast as the engine will run? If the later, I'd suspect an over-rev protection.
-Rod
-Rod
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Vibration is all the time above 2k rpm. Parked or driving. Vibration seems to peak at about 2k and then tapers off but doesn't go away.
After sitting for nearly 12 years the hydraulic lifters took a few hundred miles to free up completely but otherwise the engine is perfect until you get up where it is not comfortable.
After sitting for nearly 12 years the hydraulic lifters took a few hundred miles to free up completely but otherwise the engine is perfect until you get up where it is not comfortable.
Logistics Pro
Joined: Jun 2009
Posts: 4,812
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From: Cedar Rapids, IA
If you have access to a Chassis Ear you could use that and position some microphones on the bell housing or transmission cross member and others on the oil pan flange near the balancer, then see where the noise seems loudest. Maybe you're discovering why a low mileage engine and trans were pulled and placed on a pallet....
-Rod
-Rod
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The engine/transmission was pulled from a Explorer/Firestone rollover. I have an engine stereoscope and will try that. Thanks for the thought.
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