Pistons, Rings, etc. 2011 Terrain - TerrainForum.net: GMC Terrain Forum
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post #1 of 8 (permalink) Old 06-14-2019, 04:58 PM Thread Starter
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Pistons, Rings, etc. 2011 Terrain

So at about 102K miles our I4 Terrain meets GM's spec for excessive oil consumption. Unfortunately the time limit for the 7-year excessive oil consumption warranty has expired, but not the miles (120K in bulletin 15285). I opened a case with GM and dealer was able to have GM agree to pay for about 1/2 of the repair for about $1500.

Has anyone else had this "kit" service done on their I4 Terrain or Equinox and how well did the engine run afterward? I understand other parts including the timing chain are replaced besides the pistons and rings. What are your thoughts about spending $1500 on this repair vs. just keep adding oil when needed. I'm pretty sure we want to keep the Terrain for another year and I'm also thinking it could help with resale if the job was done.

I appreciate your thoughts. Thanks.

2011 Terrain SLT-1, 4 Cyl, FWD, Mocha Steel<br />Brownstone Leather, NAV, Rear DVD, Power Liftgate, Michelin Defender Tires, Penzoil Platinum Plus
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post #2 of 8 (permalink) Old 06-14-2019, 08:02 PM
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Quote:
Originally Posted by DavidPJ View Post
So at about 102K miles our I4 Terrain meets GM's spec for excessive oil consumption. Unfortunately the time limit for the 7-year excessive oil consumption warranty has expired, but not the miles (120K in bulletin 15285). I opened a case with GM and dealer was able to have GM agree to pay for about 1/2 of the repair for about $1500.

Has anyone else had this "kit" service done on their I4 Terrain or Equinox and how well did the engine run afterward? I understand other parts including the timing chain are replaced besides the pistons and rings. What are your thoughts about spending $1500 on this repair vs. just keep adding oil when needed. I'm pretty sure we want to keep the Terrain for another year and I'm also thinking it could help with resale if the job was done.

I appreciate your thoughts. Thanks.
My Equinox was serviced in December. Mine was under warranty so I did some extra work to the head to include cleaning grinding the valves. What is your consumption? Is it way above or just met the 1qt/2k miles. I have heard some people with older Ecotec engines, soak the cylinders over night with strong solvent to loosen up the carbon and varnish around the rings, siphon it out, drain and flush the oil and then, run it high speed (WOT) on the highway to free up the rings. Sometimes this works.

If your timing chains are noisy at idle, their time is limited. $1500 is good deal, the chain replacement alone can cost at least $1k. Your 2011 should be checked and I would ask them to replace the HP fuel pump.

The exhaust manifold is known to crack over the years. Mine was cracked as others predicted. It had not started to rattle, but it was just a matter of time. One exhaust bolt was broken and missing. I would have them check before tearing the head off. Cost is $150 and a gasket.

I would have them do compression and leak down test to determine if there are other potential problems down the road. Does not make sense to fix the rings, just to have valves begin to leak shortly there afterward. Exhaust valves on mine showed pitting after only 90K. As I said I had the head cleaned and services for about $300 dollars and the dealer re-installed when I brought it back. Save a bunch of money.

The piston/ring kit includes valves stem seals. I would ask them to replace as these are also a source of oil consumption. They may try to get you to pay more but I would argue it.

Have them take detailed pictures of the cylinder walls, and the connecting rod bearings. If there scoring or excessive wear in the cylinders, then they will replace the engines. Same for the bearings, only slight wear is allowed, otherwise replacement is included.

Once complete, I would change the oil after 1000 miles, and again at 3000 miles to get rid of the wear metals in the oil. After about 4-5k miles the rings and cylinders should be seated or worn in to properly seal the cylinders. Until that time I was still seeing some oil and water build-up in the PCV system from blow-by. Waiting for this winter to see if there is an improvement.

This will definitely help with re-sale value, but only for a private sale. Keep all your records.
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post #3 of 8 (permalink) Old 06-15-2019, 09:31 AM Thread Starter
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Thanks for your detailed reply. What year is your Equinox? That's great that you were able to have it repaired under warranty. Looking at the parts list for bulletin 15285D, I didn't notice valve stem seals as part of the kit.

The last oil consumption test showed 1-1/2 quarts after about 1000 miles. This was the first time it used that much oil during the consumption test period. I've been complaining to my dealer about oil consumption for years, but this was the first time it met GM's requirements for excessive oil consumption. The Terrain's gas mileage never was even close to the advertised mpg.

The timing chain, tensioner, and water pump was replaced at about 60K miles.

I would like to have the job done if for no other reason than fear of this situation getting worse, new problems with the timing chain, or various gasket leaks. The engine has a chirp upon startup and I'm thinking it could be the timing chain or tensioner again. No rattle like the last time the chain was replaced.

Overall it's been a good vehicle and it's in good condition, although the transmission solenoid module failed several months ago. We're not ready to replace it, and if it's just a matter of adding oil more frequently I could live with that. But it's always the fear of what might happen if I don't have the repair done.

Thanks for the tip on the exhaust manifold.

2011 Terrain SLT-1, 4 Cyl, FWD, Mocha Steel<br />Brownstone Leather, NAV, Rear DVD, Power Liftgate, Michelin Defender Tires, Penzoil Platinum Plus

Last edited by DavidPJ; 06-15-2019 at 09:33 AM. Reason: Formatting
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post #4 of 8 (permalink) Old 06-15-2019, 10:09 PM
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I had my 2011 done under warranty last year. I would say it would be worth the cost. I fixed all the problems I had. See this post, I posted a pic of all the parts they replaced under 15825


https://www.terrainforum.net/240713-post26.html
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post #5 of 8 (permalink) Old 06-16-2019, 09:32 AM Thread Starter
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Thanks Daedra.

I'm on the fence about having the repair done. After reading about the other problems with this engine, that fortunately we have not had, I'm concerned this engine will eventually lead to even more problems at our cost. I want to keep the vehicle for another 30K miles, but maybe now is the best time to sell it before any new problems arise.

2011 Terrain SLT-1, 4 Cyl, FWD, Mocha Steel<br />Brownstone Leather, NAV, Rear DVD, Power Liftgate, Michelin Defender Tires, Penzoil Platinum Plus

Last edited by DavidPJ; 06-16-2019 at 09:33 AM. Reason: Format
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post #6 of 8 (permalink) Old 06-16-2019, 01:35 PM
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Quote:
Originally Posted by DavidPJ View Post
Thanks for your detailed reply. What year is your Equinox? That's great that you were able to have it repaired under warranty. Looking at the parts list for bulletin 15285D, I didn't notice valve stem seals as part of the kit.

The last oil consumption test showed 1-1/2 quarts after about 1000 miles. This was the first time it used that much oil during the consumption test period. I've been complaining to my dealer about oil consumption for years, but this was the first time it met GM's requirements for excessive oil consumption. The Terrain's gas mileage never was even close to the advertised mpg.

The timing chain, tensioner, and water pump was replaced at about 60K miles.

I would like to have the job done if for no other reason than fear of this situation getting worse, new problems with the timing chain, or various gasket leaks. The engine has a chirp upon startup and I'm thinking it could be the timing chain or tensioner again. No rattle like the last time the chain was replaced.

Overall it's been a good vehicle and it's in good condition, although the transmission solenoid module failed several months ago. We're not ready to replace it, and if it's just a matter of adding oil more frequently I could live with that. But it's always the fear of what might happen if I don't have the repair done.

Thanks for the tip on the exhaust manifold.
Mine is a '12 Equinox with 90K at time of service. Only a few months before this the chain slipped and set a code, no damage.

The valve stem seals was part of the kit for the cylinder head, 12637166 Gasket Kit, Cylinder Head. They do not like to mention that because it takes a little more time, but replacing them after the fact can get pricey as well. You can sell them on that.

The chirp sounds like could be chain, tensioner or the camshaft actuators shifting slightly as oil pressure is restored.
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post #7 of 8 (permalink) Old 06-16-2019, 10:24 PM
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Had this done around 50k, no engine problems since.

2012 Equinox 2.4L 1LT AWD, black, 80,000 miles
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post #8 of 8 (permalink) Old 06-16-2019, 10:25 PM
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(Current mileage is around 101000 miles)

2012 Equinox 2.4L 1LT AWD, black, 80,000 miles
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