Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Ford Edge FWD V6-3.5LFACTORY OEM SERVICE PROCEDURE
System Specifications
Cylinder Block
Cylinder bore 92.5 mm (3.641 in)
Main bearing bore inside diameter 72.400-72.424 mm (2.8503-2.8513 in)
Crankshaft
Main bearing journal
Diameter 67.5 mm (2.657 in)
Maximum taper 0.004 mm (0.00015 in)
Maximum out-of-round 0.006 mm (0.00023 in)
Connecting rod journal
Diameter 55.983-56.003 mm (2.204-2.205 in)
Maximum taper 0.004 mm (0.00015 in)
Maximum out-of-round 0.006 mm (0.00023 in)
Maximum end play 0.101-0.291 mm (0.0039-0.0114 in)
Piston
Diameter - single grade 92.476-92.490 mm (3.6407-3.6413 in)
Clearance-to-cylinder bore 0.010 to 0.044 mm (0.0003-0.0017 in)
Ring end gap
Compression
(top, gauge diameter) 0.15-0.25 mm (0.0059-0.0098 in)
(bottom, gauge diameter) 0.30-0.55 mm (0.0118-0.0216 in)
Oil ring (steel rail, gauge diameter) 0.15-0.45 mm (0.0059-0.0177 in)
Ring groove width
Compression
(top) 1.230-1.25 mm (0.0484-0.0492 in)
(bottom) 1.530-1.55 mm (0.0602-0.0610 in)
Oil ring 2.53-2.55 mm (0.0996-0.1003 in)
Ring width
Upper comp ring 1.17-1.19 mm (0.0460-0.0468 in)
Lower comp ring 1.47-1.49 mm (0.0578-0.0586 in)
Ring-to-groove clearance (upper and lower compression rings) 0.040-0.080 mm (0.0015-0.0031 in)
Piston pin
Bore diameter 23.002-23.006 mm (0.9055-0.9057 in)
Pin diameter 22.998-23.000 mm (0.9054-0.9055 in)
Pin length 55.975 mm (2.203 in)
Pin-to-piston fit 0.002 to 0.008 mm (0.00007-0.0003 in)
Clearance-to-connecting rod 2.7 mm (0.1 in)
Connecting Rod
Clearance-to-pin - standard 0.007-0.021 mm (0.0002-0.0008 in)
Pin bore diameter 23.007-23.019 mm (0.905-0.906 in)
Rod length (center-to-center) 152.68 mm (6.01 in)
Maximum allowed bend 0.038 mm (0.0014 in)
Maximum allowed twist 0.050 mm (0.0019 in)
Bearing bore diameter
Grade 1 59.866-59.872 mm (2.3569-2.3571 in)
Grade 2 59.873-59.879 mm (2.3572-2.3574 in)
Grade 3 59.880-59.886 mm (2.3574-2.3577 in)
Side clearance (assembled to crank) - standard 0.175-0.425 mm (0.0068-0.0167 in)
Crankshaft Pulley Bolt
Discard the bolt
First pass 120 Nm (89 lb-ft).
Second pass Loosen one full turn
Third pass 50 Nm (37 lb-ft).
Final pass Tighten an additional 90°
Cylinder bore 92.5 mm (3.641 in)
Main bearing bore inside diameter 72.400-72.424 mm (2.8503-2.8513 in)
Crankshaft
Main bearing journal
Diameter 67.5 mm (2.657 in)
Maximum taper 0.004 mm (0.00015 in)
Maximum out-of-round 0.006 mm (0.00023 in)
Connecting rod journal
Diameter 55.983-56.003 mm (2.204-2.205 in)
Maximum taper 0.004 mm (0.00015 in)
Maximum out-of-round 0.006 mm (0.00023 in)
Maximum end play 0.101-0.291 mm (0.0039-0.0114 in)
Piston
Diameter - single grade 92.476-92.490 mm (3.6407-3.6413 in)
Clearance-to-cylinder bore 0.010 to 0.044 mm (0.0003-0.0017 in)
Ring end gap
Compression
(top, gauge diameter) 0.15-0.25 mm (0.0059-0.0098 in)
(bottom, gauge diameter) 0.30-0.55 mm (0.0118-0.0216 in)
Oil ring (steel rail, gauge diameter) 0.15-0.45 mm (0.0059-0.0177 in)
Ring groove width
Compression
(top) 1.230-1.25 mm (0.0484-0.0492 in)
(bottom) 1.530-1.55 mm (0.0602-0.0610 in)
Oil ring 2.53-2.55 mm (0.0996-0.1003 in)
Ring width
Upper comp ring 1.17-1.19 mm (0.0460-0.0468 in)
Lower comp ring 1.47-1.49 mm (0.0578-0.0586 in)
Ring-to-groove clearance (upper and lower compression rings) 0.040-0.080 mm (0.0015-0.0031 in)
Piston pin
Bore diameter 23.002-23.006 mm (0.9055-0.9057 in)
Pin diameter 22.998-23.000 mm (0.9054-0.9055 in)
Pin length 55.975 mm (2.203 in)
Pin-to-piston fit 0.002 to 0.008 mm (0.00007-0.0003 in)
Clearance-to-connecting rod 2.7 mm (0.1 in)
Connecting Rod
Clearance-to-pin - standard 0.007-0.021 mm (0.0002-0.0008 in)
Pin bore diameter 23.007-23.019 mm (0.905-0.906 in)
Rod length (center-to-center) 152.68 mm (6.01 in)
Maximum allowed bend 0.038 mm (0.0014 in)
Maximum allowed twist 0.050 mm (0.0019 in)
Bearing bore diameter
Grade 1 59.866-59.872 mm (2.3569-2.3571 in)
Grade 2 59.873-59.879 mm (2.3572-2.3574 in)
Grade 3 59.880-59.886 mm (2.3574-2.3577 in)
Side clearance (assembled to crank) - standard 0.175-0.425 mm (0.0068-0.0167 in)
Crankshaft Pulley Bolt
Discard the bolt
First pass 120 Nm (89 lb-ft).
Second pass Loosen one full turn
Third pass 50 Nm (37 lb-ft).
Final pass Tighten an additional 90°
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.