Chevy HHR Stuck Vavle
- Thread starter millerbl00
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Its a burnt valve.
Coked up ring on that particular cylinder maybe?
Just a thought. Please no blowtorch
Just a thought. Please no blowtorch
Not sure, I at the mercy of the dealership now. We I see them in person I might get better answers.
Originally Posted By: Vikas
are there any 4-cyl engines in production which are NON-INTERFERENCE any more? A stuck open valve will come in contact with the piston, right??
It depends. Sticking open just means it's not closing all the way. It's just not closing all the way.
are there any 4-cyl engines in production which are NON-INTERFERENCE any more? A stuck open valve will come in contact with the piston, right??
It depends. Sticking open just means it's not closing all the way. It's just not closing all the way.
I had a 2003 Saturn ION with a dead cylinder at ~95000 miles, so I don't feel alone.
JTK
$100 Site Donor 2025
Originally Posted By: cptbarkey
Originally Posted By: millerbl00
Service advisor recommends head cleaning by machine every year to avoid this.
find another service advisor.
Exactly. They're just trying to make some money over what they'll get for the warranty work.
I would imagine removing the cylinder head on an Ecotec is an EXPENSIVE procedure given the chain driven DOHC, aluminum head and block, etc. Thank goodness for the 5yr/100Kmi. This would probably be well over $1000 out of warranty.
Joe
Originally Posted By: millerbl00
Service advisor recommends head cleaning by machine every year to avoid this.
find another service advisor.
Exactly. They're just trying to make some money over what they'll get for the warranty work.
I would imagine removing the cylinder head on an Ecotec is an EXPENSIVE procedure given the chain driven DOHC, aluminum head and block, etc. Thank goodness for the 5yr/100Kmi. This would probably be well over $1000 out of warranty.
Joe
I think something else is going on but since I can't be there to watch them I can't find the truth.
Originally Posted By: pbm
I am disappointed to hear that the Ecotec engines have a propensity for this.
I guess it would be a good idea to run a good PEA cleaner regularly to keep the injectors from plugging?
Well I am pretty disappointed. Here is a brief history:
OCI's at 7500 with PP.
UOA every 15000, no issues.
MMO once a month and Redline every 6 months.
I did everything right and now carbon up valves and pistons? Burnt exchast valve? Don't make sense.
I am disappointed to hear that the Ecotec engines have a propensity for this.
I guess it would be a good idea to run a good PEA cleaner regularly to keep the injectors from plugging?
Well I am pretty disappointed. Here is a brief history:
OCI's at 7500 with PP.
UOA every 15000, no issues.
MMO once a month and Redline every 6 months.
I did everything right and now carbon up valves and pistons? Burnt exchast valve? Don't make sense.
An 09 with 64K is very young for this kind of problem.
Yours is one engine i would like to tear into myself just out of curiosity. Something just doesn't sound right given the maintenance history.
Yours is one engine i would like to tear into myself just out of curiosity. Something just doesn't sound right given the maintenance history.
JTK
$100 Site Donor 2025
I hear you miller. I would be very disappointed with this too, but I just don't think actual carbon build-up is, or was a contributing issue here.
I've just never heard of that as being an inherent problem with these engines. They don't use EGR and their PCV systems are ported directly into the intake manifold (no hoses or exposed PCV valve) and work well. I've never heard of oil carry-over on them.
If this is indeed a common Ecotec problem, it doesn't get more horrible than this. There's no warning signs or way to know a cylinder is running just lean enough to over time cook the exhaust valve to the point it won't seal.
Joel
I've just never heard of that as being an inherent problem with these engines. They don't use EGR and their PCV systems are ported directly into the intake manifold (no hoses or exposed PCV valve) and work well. I've never heard of oil carry-over on them.
If this is indeed a common Ecotec problem, it doesn't get more horrible than this. There's no warning signs or way to know a cylinder is running just lean enough to over time cook the exhaust valve to the point it won't seal.
Joel
Can you not get a second opinion? Do your own test or find somebody trustworthy to do it for you. Get the compression and leak-down tests done and get some scanner data before jumping to any conclusion. I don't believe the dealer has your best interest in his mind.
Originally Posted By: satinsilver
What brand fuel have you been using?
Check out the retailers on www.toptiergas.com
Unfortunately I was mainly using "cheap" gas. I do think ethanol did not help.
What brand fuel have you been using?
Check out the retailers on www.toptiergas.com
Unfortunately I was mainly using "cheap" gas. I do think ethanol did not help.
Originally Posted By: Vikas
Can you not get a second opinion? Do your own test or find somebody trustworthy to do it for you. Get the compression and leak-down tests done and get some scanner data before jumping to any conclusion. I don't believe the dealer has your best interest in his mind.
No, there are not many good service departments around here. I did do a compression test and used a scan tool which confirmed some of the dealership results.
Unfortunately the dealership is an hour away and I have been unable to stop by and see the engine myself.
Can you not get a second opinion? Do your own test or find somebody trustworthy to do it for you. Get the compression and leak-down tests done and get some scanner data before jumping to any conclusion. I don't believe the dealer has your best interest in his mind.
No, there are not many good service departments around here. I did do a compression test and used a scan tool which confirmed some of the dealership results.
Unfortunately the dealership is an hour away and I have been unable to stop by and see the engine myself.
Originally Posted By: Trav
An 09 with 64K is very young for this kind of problem.
Yours is one engine i would like to tear into myself just out of curiosity. Something just doesn't sound right given the maintenance history.
I agree. This simply does not add up at such low mileage.
An 09 with 64K is very young for this kind of problem.
Yours is one engine i would like to tear into myself just out of curiosity. Something just doesn't sound right given the maintenance history.
I agree. This simply does not add up at such low mileage.
If a piece of carbon got lodged in the exhaust valve, can it then lead to this condition? Is it possible for that piece to survive there and burn the valve/seat area? This assumes that leak-down test has confirmed leaky exhaust valve.
That would have done a number on the power, gas mileage and catalytic converter. Did OP notice the effect on power and gas mileage before check engine light started coming on?
That would have done a number on the power, gas mileage and catalytic converter. Did OP notice the effect on power and gas mileage before check engine light started coming on?
Originally Posted By: Vikas
If a piece of carbon got lodged in the exhaust valve, can it then lead to this condition? Is it possible for that piece to survive there and burn the valve/seat area? This assumes that leak-down test has confirmed leaky exhaust valve.
That would have done a number on the power, gas mileage and catalytic converter. Did OP notice the effect on power and gas mileage before check engine light started coming on?
Thats what the dealership says.
No loss of power or gas mileage that I could tell.
If a piece of carbon got lodged in the exhaust valve, can it then lead to this condition? Is it possible for that piece to survive there and burn the valve/seat area? This assumes that leak-down test has confirmed leaky exhaust valve.
That would have done a number on the power, gas mileage and catalytic converter. Did OP notice the effect on power and gas mileage before check engine light started coming on?
Thats what the dealership says.
No loss of power or gas mileage that I could tell.
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