LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical (5.6L)) >> Symptom Diagnosis >> Noise, Vibration And Harshness (NVH) Troubleshooting >> Use the Chart Below to Help You Find the Cause of the Symptom

Use the Chart Below to Help You Find the Cause of the Symptom

WARNING: This page is about a different variant/trim than selected.
  1. Locate the area where noise occurs.
  2. Confirm the type of noise.
  3. Specify the operating condition of the engine.
  4. Check specified noise source.

If necessary, repair or replace these parts.

Location of noise

Type of noise

Operating condition of engine

Source of noise

Check item

Reference

Before warm-up

After warm-up

When starting

When idling

When racing

While driving

Top of engine

Rocker cover

Cylinder head

Ticking or clicking

C

A

--

A

B

--

Tappet noise

Valve clearance

Inspection 

Rattle

C

A

--

A

B

C

Camshaft bearing noise

Camshaft runout

Camshaft journal oil

clearance

Inspection 

Crankshaft pulley

Cylinder block (Side of engine)

Oil pan

Slap or knock

--

A

--

B

B

--

Piston pin noise

Piston to piston pin oil clearance

Connecting rod bushing oil clearance

Inspection 

Slap or rap

A

--

--

B

B

A

Piston slap noise

Piston to cylinder bore clearance

Piston ring side clearance

Piston ring end gap

Connecting rod bend and torsion

Inspection 

Knock

A

B

C

B

B

B

Connecting rod bearing noise

Connecting rod bushing oil clearance

Connecting rod bearing oil clearance

Inspection 

Knock

A

B

--

A

B

C

Main bearing noise

Main bearing oil clearance

Crankshaft runout

Inspection 

Front of engine

Timing chain case

Tapping or ticking

A

A

--

B

B

B

Timing chain and timing chain tensioner noise

Timing chain cracks and wears

Timing chain tensioner operation

Inspection 

Front of engine

Squeaking or fizzing

A

B

--

B

--

C

Drive belts (Sticking or slipping)

Drive belts deflection

Tension Adjustment 

Creaking

A

B

A

B

A

B

Drive belts (Slipping)

Idler pulley bearing operation

Squall

Creak

A

B

--

B

A

B

Water pump noise

Water pump operation

Removal and Installation

A: Closely relatedB: RelatedC: Sometimes related--: Not related