6.0 Ping

[Wink]

Well...I've tried most everything I can think of to get this 2001 6.0 to stop pinging.  It even pings on 93 octane gas!  I've gone to colder plugs, cleaners, additives and whatnot, nothing seems to help.  I'm afraid to take it back to a dealer because if they retard the spark advance it will lose the great low end power pop it has.  I've tried teaching it to use lower octane but to no avail.  I've tried resetting the computer too.

 

    Does anyone have an idea before I find a dealer to whine to?

[whitesnake01]

With factory warranty, if it was my truck I would take it back to the dealer. If you do not like that particular dealer, go to another one.

[Shaners]

My service mgr told me once that using anything other than regular unleaded fuel in these trucks can send them into a "Tizzy".

 

I've always been able to hear a little top end noise in my truck, but I attribute that to the aluminum heads and the way they reverberate sound as compared to cast iron heads.  However the noise I hear is more at low RPM's and not under acceleration, so I may describing something you don't have or aren't concerned about either.  (I don't have the knock you get like when you have bad fuel and you are pulling a load).

[Wink]

    BIG NEWS!

 I just talked to the service manager at a small Chevy dealership near where I live now, there is a GM Service Bulletin that was issued 5/22/02 that discusses the ping problem.  It states that the rear knock sensor is probably defective and should be replaced.  Mine is being replaced next tuesday morning.  I'll report the result.

[swl2126]

Wink,

 

Do you have the TSB number or the specific verbage?

[Wink]

I'll try to get the TSB when I'm at the dealer on Tuesday

 

Wink

[swl2126]

Wink,

 

Here it is...  See if they'll give you the complete text.

 

02-06-04-023; Audible Spark Knock

(Detonation), MIL Illuminated, DTC P0332

Set (Replace Rear Bank Knock Sensor and

RTV Area Around Sensor); 1998-2002

Chevrolet Camaro, Corvette, Pontiac Firebird

with 5.7L Engine (VIN G – RPO LS1), 1999-

2002 Chevrolet and GMC C/K Pickup and

Utility Models with 4.8L, 5.3L or 6.0L Engine

(VINs V, T, Z, N, U – RPOs LR4, LM7, L59,

LQ9, LQ4)

[swl2126]

Wink,

 

I doubt if this will repair the 'cold start knock'.  This is a ping issue.  Hard to believe they have to remove the intake manifold to replace this sensor.

 

 

#02-06-04-023

Audible Spark Knock (Detonation), MIL Illuminated, DTC P0332 Set (Replace Rear Bank Knock Sensor and RTV Area Around Sensor)

1998-2002 Chevrolet Camaro, Corvette

1998-2002 Pontiac Firebird

 

with 5.7L Engine (VIN G -- RPO LS1)

 

1999-2002 Chevrolet and GMC C/K Pickup and Utility Models (Avalanche, Silverado, Sierra, Tahoe, Suburban, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL)

 

with 4.8L, 5.3L or 6.0L Engine (VINs V, T, Z, N, U -- RPOs LR4, LM7, L59, LQ9, LQ4)

 

Condition

Some customers may comment on a mild to severe engine ping (commonly referred to as spark knock), usually worse during acceleration and/or an illuminated MIL. Upon investigation, the technician may find DTC P0332 set.

 

Cause

This condition may be the result of corrosion of the rear bank knock sensor due to water intrusion into the sensor cavity. This condition is more apparent on vehicles in which customers frequently wash the engine compartment.

 

Correction

Replace the rear bank knock sensor and build a dam (wall) around the sensor using RTV to divert water away from the sensor. Use the procedure and part number listed below.

 

Remove the intake manifold. Refer to the Intake Manifold Replacement procedure in the Engine Controls sub-section of the appropriate Service Manual.

 

 

Remove the wiring harness assembly from the knock sensor.

 

 

Remove the rear bank knock sensor.

Install the new rear bank knock sensor. Tighten

Tighten the knock sensor to 20 N·m(15 lb ft).

 

Install the wiring harness assembly to the knock sensor.

 

 

Apply a bead of RTV silicone sealant approximately 9 mm (3/8 in) wide and 6 mm (1/4 in) high along the outside edge of the ridge on the engine block valley cover around the rear bank knock sensor. DO NOT form a complete circle. Leave the rear section open as shown.

From the underside of the intake manifold, completely remove the rear intake manifold seal (foam material).

Install the intake manifold. Refer to the Intake Manifold Replacement procedure in the Engine Controls sub-section of the appropriate Service Manual.

Parts Information

Part Number

Description

Qty

 

10456603

Sensor, Knock

1

 

 

Parts are currently available from GMSPO.

 

Warranty Information

For vehicles repaired under warranty, use:

 

Labor Operation

Description

Labor Time

 

J4437

 

(F-Car)

Sensor, Knock -- Replace

1.7 hrs

 

Add

 

(1998-1999 F-Car Only)

To Remove EGR

0.2 hr

 

J4437

 

(Y-Car)

Sensor, Knock -- Replace

1.6 hrs

 

J4437

 

(C/K-Truck)

Sensor, Knock -- Replace

1.5 hrs

 

Add

 

(C/K Truck Only)

With Three Piece Engine Covers

0.2 hr

 

Add

 

(All)

Diagnosis Time

0.3 hr

 

Add

 

(All)

To RTV Area Around Sensor and Remove Intake Manifold Seal

0.2 hr

[Wink]

Thanks for the info!  I've just about given up on the cold start knock.  The ping or detonation problem seems fixable so that's what I'm working on at this time.  The injector ball rattling is also very annoying but that's another one we must live with even though it sounds exactly like rocker arm clatter.

 

Wink