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IK1600269
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Revision: 4

CAB / SLEEPER / HOOD

Created:

3/27/2024

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2/24/2025

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Steven
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Title : Hood Squeak, Rattle and Bouncing
Applies To : Engine Hood Service - LT, RH, MV, HV, HX, CE Bus

CHANGE LOG
Please refer to the change log text box below for recent changes to this article:

02/19/2025 - Added models including CE Bus with similar hood stop design
11/19/2024 - Updated service part numbers
06/11/2024 - Added rubber hose option as alternate repair
04/23/2024 - Added P/N for grease
03/29/2024 - Initial Article Release

DESCRIPTION
This document will guide the user through the various field repairs necessary to eliminate engine hood squeaks, rattles, knocking,
and bouncing on International Trucks & Buses. For any other hood alignment or adjustment issues, please refer to the current truck
service manuals for the proper procedures.

REFERENCE DOCUMENTS
iKNow Article IK1600265 - Hood Guide Installation
iKNow Article IK1600247 - Hood Gap and Alignment Tolerances

SYMPTOM(s)
The engine hood may squeak, rattle, knock, and bounce during vehicle movement.
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):
N/A – There are no trouble Codes or Indicator Lights for this symptom.
Customer Observations or Concerns:
The driver may experience excessive noise or see excessive movement of the engine hood during vehicle operation. The noises or
movements do not pose a safety concern but are simply an annoyance to the truck's occupants, provided that both hood latches are
securely engaged.

SPECIAL TOOL(s) / SOFTWARE
N/A

SERVICE PARTS INFORMATION
Part Description

Part Number

Quantity
Required

Notes

BRACKET, SUPPORT,
HOOD, LH

3810978C6

1

Check Parts Catalog for correct P/N

BRACKET, SUPPORT,
HOOD, RH

3810979C6

1

Check Parts Catalog for correct P/N

BOLT, TORX FLAT HD
M10-1.5 X 30

3811528C1

4 per side OK to reuse the original hardware

GREASE, HEAVY
CHASSIS

VARIOUS

As needed Purchase locally

GREASE, MEDIUM
CHASSIS (Optional)

Not available through the parts
4097990R1As needed catalog. Ref: Dow Corning Molykote
400GMKK
44 Medium

RIVET, 3/16" BLIND
ALUM - .5" -.625" GRIP
RUBBER, MUD FLAP
STRIP - 1/4" THK, 1"
X2.5"

552870C1

2

May substitute

N/A

1

Fab in house

DIAGNOSTIC STEP(s)
Issue #1: Hood Noises – Squeaking or Rattling
Drive the truck over various road conditions to determine if the hood makes squeaking or rattling noises. The noises generally occur
when the truck is rocking over uneven surfaces at speeds generally over 5-10 MPH.

Issue #2: Hood Knocking and Bouncing
Drive the truck over various road conditions to determine if the hood knocks or bounces. The bounce condition can be seen at the top
of the hood where it meets the base of the windshield and generally occurs when the truck is moving at speeds of 45 MPH or higher.
When the hood starts to bounce it will normally create a knocking noise when it bounces against the hood stops.
IMPORTANT NOTE: Before completing any of the diagnostic steps below, verify that the hood is properly mounted and aligned per
iKNow Article IK1600247 - Hood Gap and Alignment Tolerances. Also verify the hood stops and hood latch hardware are properly
secured and that these parts are not loose, bent, or damaged. If so, replace the damaged/defective parts before proceeding.

Step Action for Issue #1
#1 DIAGNOSTIC: Hood Squeaking and or rattling

Decision
Yes. Apply heavy chassis grease to both
hood stops and hood guides (Left/Right)

per repair steps below
Does the hood squeak or rattle during vehicle operation?
No. No action required

Step Action for for Issue #1
DIAGNOSTIC: Hood Squeaking and or rattling
#1A Does the hood squeak or rattle during vehicle operation after newly added heavy
grease is applied?

Decision
Yes. Install rubber spacers to hood
guides on the hood where they meet the
hood stops per the repair steps below
(Left/Right)
No. No action required

Step Action for Issue #2
DIAGNOSTIC: Hood Bounce & Knocking
#2 Does the hood bounce and knock during vehicle operation?

Decision
1. Install rubber spacers to hood guides
on the hood where they meet the hood
stops per repair steps below (Left/Right)
2. No action is required

Figure 1: Hood Stops as mounted to the Cab

Figure 2: Hood Guides as mounted to the hood B-side

REPAIR STEP(s)

Figure 3: Newly added Grease to Hood Stops and Hood Guides
The standard repair for the hood bouncing and or knocking is to rivet a hand-fabricated rubber spacer onto both hood guides to fill
the space between the hood stop and the end of the hood guide when the hood is closed. (See Figure #4) Use a high-quality piece of
rubber such as a slice off of a mud flap. The thickness should be approximately 1/4" to 3/16” thick and approximately 1.0” X 2.5” in
size. (See Figure #5 Left side is shown, the right side is the opposite)

Figure #4: Rubber spacer riveted to hood stop guide with added grease

Figure #5: Rubber Spacer Fabrication Drawing

NOTE: As an alternate repair method to adding the rubber pad to the hood bracket as
described above a short section of rubber hose can be cut and slid over the rubber hood
stop and secured with a screw as shown in Figure #6.

Figure #5: Rubber hose section over rubber hood stop shown as an alternate repair option.

WARRANTY INFORMATION
Warranty Claim Coding:
Refer to the Warranty Coding Manual for Group and Noun Codes.

Standard Repair Time(s):
Refer to the SRT Manual for Repair Times

OTHER RESOURCES
Master Service Information Site

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