How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask David H Your Own Question

David H
David H, GM master certified
Category: Chevy
Satisfied Customers: 2669
Experience:  Cadillac Technician 18 years cadillac dealer.ase master certified.gm master certified
19861837
Type Your Chevy Question Here...
David H is online now
A new question is answered every 9 seconds

Chevrolet HHR LT hhr engine tapping eng knock sensor

Customer Question

hhr engine tapping eng knock sensor
Submitted: 3 years ago.
Category: Chevy
Expert:  David H replied 3 years ago.

David H :

Does the engine tapping noise occur all the time,cold or hot.

Customer: replied 3 years ago.

Engine just serviced. After pickup on the way home i heard a tapping sound comming from the engine like a stuck lifter or something. Tapping when engine is cold or hot. Can hear at idle and while driving.Then engine light came on steady. Checked gas cap, filled up with 89 oct (reg use 87 oct) no help. Returned to my mech. Code said engine knock sensor. He has inspected everything and can find nothing worng, but the tapping is still there. What next, change the sensor ro any other ideas?

Thanks

Expert:  David H replied 3 years ago.
I would have the oil filter changer again.You may have a problem with proper flow through the filter causing your noise.A code for a knock sensor will cause a check engine light but won't cause an actual noise.
Customer: replied 3 years ago.
Oil filter changed,result still the same result. Not sure if the mech checked the oil pressure. if oil pressure is good, what step next?
Expert:  David H replied 3 years ago.
What engine do you have?
Customer: replied 3 years ago.

Crap, not sure, the HHR is in the shop.It's not the supercharged one. I'll give them a call. I hpe this does not require a engine tear down.

Expert:  David H replied 3 years ago.
You will need to have the oil pressure tested at the engine block then at the cylinder head.If the pressure is normal at the engine block bot low at the cylinder head then there is a blockage in the head.The head will need to be removed and cleaned out if this is the case.Here is the testing procedure.


Subject:Cylinder Head Tick Noise And/Or Damage
Models:2011 Buick Regal
2010-2011 Buick LaCrosse
2002-2005 Chevrolet Cavalier
2005-2010 Chevrolet Cobalt, Cobalt SS
2010-2011 Chevrolet Equinox
2006-2011 Chevrolet HHR
2008-2010 Chevrolet HHR SS
2004-2011 Chevrolet Malibu
2004-2005 Chevrolet Malibu Classic
2010-2011 GMC Terrain
2002-2004 Oldsmobile Alero
2007-2010 Pontiac G5
2006-2010 Pontiac G6
2002-2005 Pontiac Grand Am, Sunfire
2005-2006 Pontiac Pursuit (Canada Only)
2006-2010 Pontiac Solstice
2007-2010 Pontiac Solstice GXP
2007-2010 Saturn Aura, Aura Hybrid
2003-2007 Saturn Ion
2004-2007 Saturn Ion Redline
2001-2005 Saturn L Series
2007-2010 Saturn Sky, Sky Redline
2002-2010 Saturn Vue
2007-2010 Saturn Vue Hybrid
With any of the following engines:
2.0L Engine (LSJ)
2.0L Engine (LNF)
2.2L Engine (L61)
2.2L Engine (LAP)
2.2L Engine (LE8)
2.4L Engine (LE5)
2.4L Engine (LE9)
2.4L Engine (LAT)
2.4L Engine (LAF)


This PI was superseded to update model years. Please discard PIP4495B.


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.


A technician may find noise coming from the cylinder head. This may be due to loss of oil pressure.




This concern may be caused by debris clogging the oil feed restrictor in the cylinder head passage. The oil feed hole has a small inner diameter and may clog if debris or excessive RTV or similar type gasket/sealer has dislodged and become stuck in this passage. Anytime RTV or similar sealer is used, care must be taken not to use excessive amounts that can become dislodged causing future concerns. This restrictor is located in the oil feed passage to the cylinder head and cannot be inspected/cleaned without cylinder head removal. NOTE: The restrictor is not available separate from the cylinder head. See callout #2.


Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here
View Full Image

Attachments are only available to registered users.

Register Here


To diagnose this concern: Using a mechanical oil pressure gauge, check/compare the oil pressure in the block with the oil pressure in the cylinder head. The block can be checked by removing the oil pressure sender or another engine block oil gallery plug. The oil pressure to the cylinder head can be checked by removing one of the oil galley plugs in the cylinder head. See callout #1.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics