Vibration issues

2000 FORD MUSTANG
174,000 MILES • 3.8L • 6 CYL • RWD • MANUAL
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MKN
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bought this car with broke motor support. fixed it, only to discover real bad engine vibration. I was convinced I had bad motor. put in 2006 Mustang engine. donor was automatic, so used old flywheel. engine runs great still got vibration, not as bad. only part reused was flywheel. I read all about 2000 model and internal and external balancing. should I buy 2006 flywheel or what? new engine is 4.0 I assume they are all internal balanced. Help!!
Mar 2, 2015 at 6:42 PM
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CADIEMAN
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I would replace the motor and transmission mounts before replacing the fly wheel. sounds like you have metal to metal rubbing some where.
Mar 2, 2015 at 8:30 PM
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MKN
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i have already replace motor mounts, I will check transmission mount first.
Mar 3, 2015 at 4:51 AM
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JACOBANDNICKOLAS
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Hi,

The idea that you reused the same flywheel with a different size engine doesn't seem like the best idea. If you replaced the engine with a 4.0, it's going to be different. As far as engines being balanced, yes they are, but components which attach to them must also be balanced. For example, a harmonic balancer is designed to reduce vibration and the flywheel is also balanced for the engine design to reduce vibration.

Keep in mind, the original flywheel could have been warped, or something could have caused a balance issue. So, here are directions for removal and replacement, and the second set of directions are for checking/testing the flywheel. All attached pictures correlate with the directions.

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2000 Ford Mustang V6-3.8L VIN 4
Flywheel - Removal and Installation
Vehicle Transmission and Drivetrain Flywheel Service and Repair Procedures Flywheel - Removal and Installation
FLYWHEEL - REMOVAL AND INSTALLATION
Removal
1. Remove the transmission.
2. If equipped with a manual transmission, remove the clutch.


Pic 1


3. Remove the flywheel bolts.

Installation


Pic 2


1. To install, reverse the removal procedure.

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Flywheel checking:

1. Check the flywheel surface for scoring, cracks or discoloration. Minor scotches or discoloration should be removed with a fine emery cloth.

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2000 Ford Mustang V6-3.8L VIN 4
Flywheel Runout Check
Vehicle Transmission and Drivetrain Manual Transmission/Transaxle Service and Repair Procedures Manual Transmission and Clutch Flywheel Runout Check
FLYWHEEL RUNOUT CHECK
Special Tools

Pic 3



1. Mount the special tool so that the indicator contact point rides on the clutch disc contact surface.


Pic 4


2. Turn the flywheel; if the runout exceeds the maximum allowance, install a new flywheel.

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I hope something here helps. Let me know if you have other questions.

Take care,
Joe
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Mar 29, 2020 at 8:50 PM