Engine noise
01-26-2010 | 08:11 AM
#1
Thread Starter
Joined: 11-14-2008
Posts: 5
From: Senatobia, MS
Engine noise
New guy checking in. I found a used 09 SS and have had it for about 6 months.
Took in to a dealer this morning to get the TSB done on the intake tube holddown stud.
I asked about the ticking noise that seems to be coming from behind the engine in the turbo area and he says that that noise is normal for a ECOTEC.
It's like a lifter noise in a V8 when the hyd lifters aren't adjusted correctly.
I've had a truck into the same place and they said the rear end noise was normal in that one too so there is a low trust factor already with these guys.
Can someone confirm the noise is normal when idling. It's not noticeable when driving, just when you have the hood open idling and inside if you turn the radio off and listen.
Took in to a dealer this morning to get the TSB done on the intake tube holddown stud.
I asked about the ticking noise that seems to be coming from behind the engine in the turbo area and he says that that noise is normal for a ECOTEC.
It's like a lifter noise in a V8 when the hyd lifters aren't adjusted correctly.
I've had a truck into the same place and they said the rear end noise was normal in that one too so there is a low trust factor already with these guys.
Can someone confirm the noise is normal when idling. It's not noticeable when driving, just when you have the hood open idling and inside if you turn the radio off and listen.
01-26-2010 | 08:16 AM
#2
Senior Member
Joined: 08-20-2006
Posts: 21,640
From: Hillsdale, Michigan
Generally on start up and then lessens once it warms up:
Document ID# 2049170
--------------------------------------------------------------------------------
Subject: Clicking/Ticking Sound/Noise Heard During Cold Start - Sound/Noise Decreases But Continues As Engine Warms (Normal Operation of High Pressure Fuel Pump and Injectors) #06-06-93-001C - (01/16/2008)
Models: 2008 Chevrolet HHR SS
2007-2008 Pontiac Solstice
2007-2008 Saturn Sky
2007-2008 Opel GT
2007-2008 Daewoo G2X
with 2.0L Turbo Engine (VIN X - RPO LNF)
--------------------------------------------------------------------------------
This bulletin is being revised to add the 2008 Chevrolet HHR SS. Please discard Corporate Bulletin Number 06-06-93-001B (Section 06-Engine).
--------------------------------------------------------------------------------
Do This
Don't Do This
Inform the customer that this is normal operation of the high pressure fuel pump and injectors.
DO NOT replace the high pressure fuel pump and or injectors.
The 2.0L turbo engine (VIN X - RPO LNF) uses a direct injection fuel system that operates at very high fuel pressures. A direct injection fuel system produces a rapid, clicking and ticking sound that can be heard from the engine compartment. The sound is more evident when outside around the vehicle or when the hood is open. The sound is more noticeable during idle, and is more frequent during a cold start but lessens once the engine is warm. The rapid ticking noise on cold start up is the fuel pump (located on the rear of the cylinder head) building up high fuel pressure. When the engine warm-up is completed, the high pressure fuel pump will continue to tick at a lower rate of approximately one tick per second during idle. The clicking sound is the fuel injectors pulsing on and off under higher fuel pressures. These sounds are the results of a normal direct injection fuel system operating properly.
DO NOT attempt to repair or replace any parts for this kind of clicking or ticking concern. The clicking or ticking sound is not indicative of any concerns with the engine or the vehicle. You may wish to give the customer a copy of this bulletin.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© Copyright General Motors Corporation. All Rights Reserved.
--------------------------------------------------------------------------------
Document ID# 2049170
--------------------------------------------------------------------------------
Subject: Clicking/Ticking Sound/Noise Heard During Cold Start - Sound/Noise Decreases But Continues As Engine Warms (Normal Operation of High Pressure Fuel Pump and Injectors) #06-06-93-001C - (01/16/2008)
Models: 2008 Chevrolet HHR SS
2007-2008 Pontiac Solstice
2007-2008 Saturn Sky
2007-2008 Opel GT
2007-2008 Daewoo G2X
with 2.0L Turbo Engine (VIN X - RPO LNF)
--------------------------------------------------------------------------------
This bulletin is being revised to add the 2008 Chevrolet HHR SS. Please discard Corporate Bulletin Number 06-06-93-001B (Section 06-Engine).
--------------------------------------------------------------------------------
Do This
Don't Do This
Inform the customer that this is normal operation of the high pressure fuel pump and injectors.
DO NOT replace the high pressure fuel pump and or injectors.
The 2.0L turbo engine (VIN X - RPO LNF) uses a direct injection fuel system that operates at very high fuel pressures. A direct injection fuel system produces a rapid, clicking and ticking sound that can be heard from the engine compartment. The sound is more evident when outside around the vehicle or when the hood is open. The sound is more noticeable during idle, and is more frequent during a cold start but lessens once the engine is warm. The rapid ticking noise on cold start up is the fuel pump (located on the rear of the cylinder head) building up high fuel pressure. When the engine warm-up is completed, the high pressure fuel pump will continue to tick at a lower rate of approximately one tick per second during idle. The clicking sound is the fuel injectors pulsing on and off under higher fuel pressures. These sounds are the results of a normal direct injection fuel system operating properly.
DO NOT attempt to repair or replace any parts for this kind of clicking or ticking concern. The clicking or ticking sound is not indicative of any concerns with the engine or the vehicle. You may wish to give the customer a copy of this bulletin.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© Copyright General Motors Corporation. All Rights Reserved.
--------------------------------------------------------------------------------
Document ID# 2049170
01-26-2010 | 12:07 PM
#3
Senior Member
Joined: 07-10-2008
Posts: 421
From: Not necessarily Humbolt County
I don't know the specific pressure but my guess is the direct injection is in the 18k PSI range (far cry from 45 PSI eh?)
I would expect the metering and injectors to make some serious noise.
I would expect the metering and injectors to make some serious noise.
01-26-2010 | 05:42 PM
#5
Senior Member
Joined: 07-15-2009
Posts: 2,070
From: Waterbury CT
True, the ticking was disconcerting at first, but you get used to it. It's pretty much a similar sound the 420A motors in the Neons make. You think it sounds like a problem but find out it's a normal process lol.
Later
Allex
Later
Allex
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