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TECHNICAL SERVICE BULLETIN
3.5L EcoBoost - Oil Pan Leaking - Built On Or Before 19-Mar2018

20-2051
25 February 2020

This bulletin supersedes 20-2015. Reason for update: Incorrect or Missing Parts
Model:
Ford
2017-2018 F-150
2018 Expedition
Lincoln
2018 Navigator
Summary
This article supersedes TSB 20-2015 to update the Parts List.
Issue: Some 2017-2018 F-150 vehicles equipped with a 3.5L EcoBoost engine built at Kansas City
Assembly Plant on or before 23-Feb-2018 or Dearborn Truck Plant on or before 26-Feb-2018 and
Expedition/Navigator vehicles built on or before 19-Mar-2018 may exhibit an oil leak from the oil pan RTV
seal. This may be due to a lack of RTV adhesion. This article includes detailed steps to achieve proper
RTV adhesion. To correct the condition, follow the Service Procedure steps to replace the oil pan.
Action: Follow the Service Procedure steps to correct the condition on vehicles that meet all of the
following criteria:
• One of the following vehicles:
- 2017-2018 F-150 built at Kansas City Assembly Plant on or before 23-Feb-2018
- 2017-2018 F-150 built at Dearborn Truck Plant on or before 26-Feb-2018
- 2018 Expedition/Navigator built at Kentucky Truck Plant on or before 19-Mar-2018
• 3.5L EcoBoost engine
• Oil leak from oil pan RTV seal
NOTE: Part quantity refers to the number of that service part number required, which may be
different than the number of individual pieces. Service part numbers contain 1 piece unless
otherwise stated.
Parts
Part
Number

Description

HL3Z6675-A

-

AA5Z6714-A

-

N808684S101

-

W702600S439

-

Quantity

Oil Pan
Oil Filter
Steering Shaft Bolt (2018 F-150)
Steering Shaft Bolt (2018 Expedition/Navigator)
Axle Housing Nut

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1
1
1
1
1

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W712723S441

Package Contains 4
Pieces, 1 Pieces
Required

W712724S439

Package Contains 4
Pieces, 2 Pieces Axle Housing Bolt
Required

1

W716700S442

Package Contains 4
Pieces, 1 Pieces Axle Housing Nut
Required

1

W712743S439

Package Contains 4
Pieces, 1 Pieces Axle Housing Bolt
Required

1

TA-357

-

Motorcraft® High Performance Engine RTV Silicone

As
Needed

ZC-30-A

-

Motorcraft® Silicone Gasket Remover

As
Needed

ZC-31-B

-

Motorcraft® Metal Surface Prep Wipes

As
Needed

PM-4-A

-

Motorcraft® Metal Brake Parts Cleaner (Compliant With
Low Volatile Organic Compound Requirements As
Required In Some USA States)

As
Needed

PM-4-B

-

Motorcraft® Metal Brake Parts Cleaner (Not Compliant
With Volatile Organic Compound Requirements)

As
Needed

ZC-20

-

Motorcraft® Engine Shampoo and Degreaser

As
Needed

XO-5W30Q1SP

-

Motorcraft® SAE 5W-30 Premium Synthetic Blend Motor
Oil (All Markets Except Canada)

6

CXO-5W30LSP6

-

Motorcraft® SAE 5W-30 Super Premium Motor Oil
(Canada Only)

6

Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part
Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior
approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the
identified causal part and verified using the OASIS part coverage tool.
Labor Times
Operation
No.

Description

Time

2017 F-150 4X2 3.5L EcoBoost: Inspect And Replace The Engine Oil Pan (Do Not
Use With Any Other Labor Operations)

202051A

3.2
Hrs.

2017 F-150 4X4 3.5L EcoBoost: Inspect And Replace The Engine Oil Pan (Do Not
Use With Any Other Labor Operations)

202051B

3.6
Hrs.

2018 Expedition/Navigator/F-150 4X2 3.5L EcoBoost: Inspect And Replace The
Engine Oil Pan (Do Not Use With Any Other Labor Operations)

202051C

2.3
Hrs.

2018 Expedition/Navigator/F-150 4X4 3.5L EcoBoost: Inspect And Replace The
Engine Oil Pan (Do Not Use With Any Other Labor Operation)

202051D

2.9
Hrs.

Repair/Claim Coding
Causal Part:

6675

Condition Code: D8

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Service Procedure
CAUTION: Cleaning and preparation of the engine sealing surface is absolutely critical for
proper adhesion of the new oil pan. Improperly cleaned and prepared sealing surfaces will result
in an oil leak.
1. Remove and discard the oil pan. It is recommended to allow the crankcase to drain overnight to prevent
contamination of the engine sealing surface. Refer to the Workshop Manual (WSM), Section 303-01.
2. Thoroughly clean the engine sealing surface using Motorcraft® Silicone Gasket Remover and a plastic
scraper. Allow the gasket remover to set for several minutes after application to aid in removal of the
RTV sealant. Refer to the WSM, Section 303-00.
(1). The engine block skirt stiffener sealing surface must be clean and free of any residual RTV. Do not
use metal scrapers, wire brushes, or rotary tools of any type on the engine sealing surface. These
tools will cause damage to the sealing surface including scratches or gouges that will create leak
paths. A second application of Motorcraft® Silicone Gasket Remover may be required.
CAUTION: When cleaning the engine sealing surface it must be wiped clean using a lint free
cloth. Spraying the surface with brake cleaner and air drying will not adequately remove the oil
and other contaminates from the surface and may leave residue from the brake cleaner that may
interfere with RTV adhesion.
3. Use a lint free towel and Motorcraft® Metal Brake Parts Cleaner to remove all residual sealant and oil
from the engine sealing surface until a clean lint free towel no longer shows any residual oil when wiping
the surface. (Figures 1-2)
(1). Use only Motorcraft® Metal Brake Parts Cleaner to clean the engine sealing surface. Some
unapproved brake parts cleaners contain chemicals that will inhibit RTV adhesion or may evaporate
without removing all of the residual oil from the sealing surface which will result in a repeat leak
condition.
Figure 1

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Figure 2

CAUTION: Motorcraft® Engine Shampoo and Degreaser is used to remove residual brake
cleaner which can cause RTV failure and prepare the surface for the Motorcraft® Metal Surface
Prep Wipes. The use of any other brand engine shampoo or engine cleaner can compromise the
sealing surface and could lead to failure of the RTV seal and a fluid leak.
4. Use Motorcraft® Engine Shampoo and Degreaser to clean the surface of any remaining oil
contamination and prepare the surface for the Motorcraft® Metal Surface Prep Wipes. After Motorcraft®
Engine Shampoo and Degreaser, dry the surface with a lint free towel.
CAUTION: Do not use Motorcraft® Metal Surface Prep Wipes on the replacement oil pan.
Using Motorcraft® Metal Surface Prep Wipes on the oil pan will contaminate the treated oil pan
sealing surface causing reduced RTV adhesion and a potential oil leak.
5. Wipe the metal engine block skirt stiffener sealing surface using Motorcraft® Metal Surface Prep Wipes.
Thoroughly coat the surface with the fluid. Discard wipes after a single use.
(1). Motorcraft® Metal Surface Prep Wipes create a conversion coating providing an improved base for
RTV sealing. The fluid is a water-based, slightly acidic solution that will etch and bond to the metal to
provide a microscopic layer to which the RTV can adhere. If the surface is oily, the solution will bead
and the surface will not be treated properly. If the solution beads when applied to the sealing surface,
the surface must be cleaned again and Motorcraft® Metal Surface Prep Wipes reapplied. (Figures 3-4)
Figure 3

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Figure 4

NOTE: If the sealing surface or an area of the sealing surface becomes contaminated after it has
been prepared, use a lint-free towel soaked in isopropyl alcohol to clean the area. Prepare the area
again using Motorcraft® Metal Surface Prep Wipes.

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6. Allow the surface to air dry for approximately 2 minutes.
(1). Do not dry the surface using any other method. Attempting to dry the surface may result in sealing
surface contamination that may cause oil leaks.
NOTE: The oil pan must be installed within 10 minutes of applying the RTV.
7. Apply a 4 mm (0.16 in) bead of Motorcraft® High Performance Engine RTV Silicone to the new oil pan.
(Figure 5)
(1). Using too little sealant may result in oil leaks and using too much sealant may result in oil
contamination and engine damage.
Figure 5

8. Install the new oil pan. Refer to the WSM, Section 303-01.

© 2020 Ford Motor Company
All rights reserved.
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge,
tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or
provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do
not assume that a condition described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the
Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended
Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was
current at the time of printing. Ford Motor Company reserves the right to supersede this information with updates. The most recent
information is available through Ford Motor Company's on-line technical resources.

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