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post #1 of 9 (permalink) Old 10-06-2006, 11:21 AM Thread Starter
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Modular truck motor question.

Got a customer with a 99 expedition.

He needs a 4.6 motor.

The interchange comes up asking me if the engine has a 6 or 8 bolt flywheel.

Two questions...

Does it matter which engine he gets? Can't he just reuse his old flywheel if he gets one with the wrong flywheel?

How would one tell how many bolts are on his flywheel without physically yanking the motor?

Thanks guys.
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post #2 of 9 (permalink) Old 10-06-2006, 11:46 AM
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as per my FRPP catalog,

"4.6L engines may have 6 or 8 bolts to attach to the crankshaft. CHeck the engine code before ordering. Romeo built engines have 6 bolts and Windsor built engines have 8 bolts. All Cobra engines have 8 bolts. The 8th character in the Vin ix (X) for Windsor engine plant, or (W) for Romeo engine plant."

so it would matter which engine he gets, since if his is a Windor (8-bolt) and you give him a Romeo (6-bolt) and the Romeo's TC bolt pattern does not match his TC, then he can't use his old flywheel since it wont bolt up to the different crank

hope this helps
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post #3 of 9 (permalink) Old 10-06-2006, 12:36 PM
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The torque converter pattern is the same. The ony difference is the number of bolts that hold the flexplate on. If it has an automatic, and I assume it does, then its probably a 6 bolt. If you get the wrong bolt count on the engine you get you can just get a 6 bolt flexplate.
What does the vin number for the vehicle say the engine is?

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post #4 of 9 (permalink) Old 10-06-2006, 12:43 PM Thread Starter
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Its a 99 expedition..

1FMRU1861XLA30378
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post #5 of 9 (permalink) Old 10-06-2006, 12:46 PM
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Justin, when I look up a replacement crankshaft for a 99 Expedition 4.6, the service replacements only come in 8 bolt. It states that if the vehicle has a 6 bolt flywheel, than the flywheel has to be changed.

So I'd say that's your answer ... if you get another engine with the wrong bolt count, just change the flywheel too.


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post #6 of 9 (permalink) Old 10-06-2006, 01:02 PM
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Quote:
Originally Posted by JustinH
Its a 99 expedition..

1FMRU1861XLA30378
Your motor is from the Windsor plant the X after the 1 is the engine assy plant code.

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post #7 of 9 (permalink) Old 10-06-2006, 01:07 PM Thread Starter
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Thanks gents that answers my question.

Just for the sake of future reference, heres what the interchange looks like for a 99 expedition.

8-280 (4.6L), VIN code 6 (Windsor), 6 bolt flywheel
8-280 (4.6L), VIN code 6 (Windsor), 8 bolt flywheel
8-330 (5.4L SOHC, VIN L)
8-280 (4.6L), VIN code W (Romeo)
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post #8 of 9 (permalink) Old 11-22-2006, 05:12 PM
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Quote:
Originally Posted by rjstat
Your motor is from the Windsor plant the X after the 1 is the engine assy plant code.
Nope. The X in that VIN is the 10th digit which represents the year. 1999 in this case.

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post #9 of 9 (permalink) Old 11-25-2006, 09:05 AM
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VIN Results New Search
VIN: 1FMRU1861XLA30378

World Manufacturer Identifier - 1st, 2nd, 3rd Positions
VIN Code: 1FM
Assembly Country: USA
Make: Ford
Body Style: Sport Utility
Restraint System Type (Passenger Cars) or Brake Type and GVWR Class (Trucks and Vans) - 4th Position
VIN Code: R
Restraint: AIRBAG, SECOND GENERATION
GVWR Range: 6,001 - 7,000 Pounds
Line,Series Body Type - 5th, 6th, 7th Positions
VIN Code: U18
Vehicle Line: Expedition
Vehicle Type: Truck/SUV
Engine Type - 8th Position
VIN Code: 6
Engine: 4.6 L
Cylinders: 8
Fuel: Gasoline
Engine Manufacturer: FORD - WINDSOR ENGINE PLANT
Horsepower: 240 HORSEPOWER
Model Year - 10th Position
VIN Code: X
Model Year: 1999
Assembly Plant - 11th Position
VIN Code: L
Assembly Plant: MICHIGAN TRUCK: WAYNE, MI
Production Sequence Number - 12th - 17th
VIN Code: A30378
Prod Sequence Number A30378



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