Knocking in Engine... 07 LS - Chevy HHR Network


Problems/Service/Repairs If you have a problem with your HHR, want a tip on repairing or performing a particular service to you HHR here is the place to post!

Reply
 
 
 
Thread Tools Search this Thread
Old 12-26-2013, 04:51 PM   #1
Senior Member
Thread Starter
 
Join Date: 04-28-2013
Location: Ohio
Posts: 174
Knocking in Engine... 07 LS

have a 2007 ls stock engine.

was getting onto Highway, cars behind us and semi wouldnt get over.. so either get ran over or go faster.. car red lined for about 4 secs. now there is this loud knocking noise coming from front passenger side. doesnt matter if in gear or not in gear.

got home, lifted hood. had her put it in gear and n and p and u could hear it in all of them, if you rev the gas, knock gets louder and faster. all from front passenger side.

what should i start checking?

knock sensor has threw code long time ago and never replaced it. thats just fyi.

Last edited by 843de; 12-26-2013 at 08:05 PM.
SwaintaN is offline   Reply With Quote
Old 12-26-2013, 06:00 PM   #2
Premium Member
 
firemangeorge's Avatar
 
Join Date: 12-06-2009
Location: Fairhope, Alabama
Posts: 7,337
Timing chain tensioner came apart maybe?

A loud knocking sounds like major trouble no matter what. A little hard to diagnois over the internet though.
Maybe use a mechanics stethoscope and pinpoint exactly where the noise is coming from.
firemangeorge is offline   Reply With Quote
Old 12-26-2013, 06:07 PM   #3
Platinum Member
 
Snoopy's Avatar
 
Join Date: 05-09-2006
Location: "Upland" Mesa, Arizona
Posts: 6,733
Other than little easy things like a serpentine belt that has "knobs or tears", I think, as mentioned above, you have major problems. If that is the issue, then you'll need a qualified professional for assistance.

Oh, and I would NOT drive it.

Curious though on how and under what circumstances it stayed at red line for about 4 seconds?
Snoopy is offline   Reply With Quote
Old 12-26-2013, 06:11 PM   #4
Senior Member
Thread Starter
 
Join Date: 04-28-2013
Location: Ohio
Posts: 174
we only drove it home, it got louder of the drive 22 miles. but i checked the oil, no leaking oil, oil still at level. i know i needed to change the oil 25 miles ago. figured that isnt it either. i have a mechanic friend coming over in am to see... i was just trying to get a heads up on everything.

it didnt drive weird at all when driving it, but it did shut off the engine at stop sign, i had to restart it it.
SwaintaN is offline   Reply With Quote
Old 12-26-2013, 06:13 PM   #5
Technical Moderator
 
Lucky's Avatar
 
Join Date: 12-24-2007
Location: Seville. OH
Posts: 2,877
Removing the valve cover you can see most of timing chain and guides for a visual inspection.
Lucky is offline   Reply With Quote
Old 12-26-2013, 06:18 PM   #6
Senior Member
Thread Starter
 
Join Date: 04-28-2013
Location: Ohio
Posts: 174
Quote:
Originally Posted by Snoopy View Post
Curious though on how and under what circumstances it stayed at red line for about 4 seconds?
merging onto highway so on ramp, semi didnt get over, cars behind us, only option was to floor it, i didnt hear/see it red line for 4 secs, wife is the one who said it red lined... i told her it was probably high line cause of the passing gear from stomping the gas.
SwaintaN is offline   Reply With Quote
Old 12-26-2013, 06:41 PM   #7
Senior Member
Thread Starter
 
Join Date: 04-28-2013
Location: Ohio
Posts: 174
quick update

ok quick update... took out flash light.. im not losing oil, only lost a lil while driving it.

no oil on ground, no puddles, no major oil loss. HOWEVER there is oil on passenger side of suspension components, bottom of motor and near what looks like the pulley for the a/c clutch.
SwaintaN is offline   Reply With Quote
Old 12-26-2013, 08:17 PM   #8
Administrator
 
843de's Avatar
 
Join Date: 06-30-2010
Location: Kannapolis NC
Posts: 25,956
It doesn't sound good at all, knocking sounds combined with oil being puked out usually indicate a terminal or near terminal condition.

It could a failed timing chain tensoiner allowing the chain to slap the inside of the timing chain cover.

Your chain guides may have disintegrated, or it could be a rod knock where either the bearing on the wrist pin or big end have failed allowing the rod to start "hammering".

Keep us updated, but I have a sinking feeling that your friend the mechanic is going to ruin your day.

But used engines are available starting in the $600-$750 range and on up, if your engine is terminal, that's one option to pursue.
843de is offline   Reply With Quote
Old 12-26-2013, 09:09 PM   #9
Senior Member
Thread Starter
 
Join Date: 04-28-2013
Location: Ohio
Posts: 174
im hoping its just the timing chain system busted out.. i can get a new timing chain with all components for 175.00 the plus the labor... waiting to hear from him... how do u tell the difference from timing chain and rod? i thought when u blew a rod it went threw the engine
SwaintaN is offline   Reply With Quote
Old 12-26-2013, 09:58 PM   #10
Premium Member
 
firemangeorge's Avatar
 
Join Date: 12-06-2009
Location: Fairhope, Alabama
Posts: 7,337
Only if the rod breaks. You can have a failed rod bearing or wrist pin that could knock but still be attatched. If it's still connected with a bad bearing it will sometimes beat through the bearing and then start beating against the crank. It won't last long before it "hand gernades" the rod. Usually out the block.
firemangeorge is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Knocking, clicking under engine grannydeb Problems/Service/Repairs 7 05-08-2014 07:35 AM
Knocking in Front End Mischevious Problems/Service/Repairs 6 10-10-2012 02:37 PM
knocking at high speeds DTHarris Problems/Service/Repairs 9 11-11-2011 02:58 PM
knocking noise ginginee Problems/Service/Repairs 10 02-03-2010 09:42 PM
Knocking ian Problems/Service/Repairs 14 01-19-2007 10:12 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 09:49 PM.


Copyright © 2005 - 2017 Internet Brands, Inc. All rights reserved.