2013 production changes - TerrainForum.net: GMC Terrain Forum
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post #1 of 3 (permalink) Old 01-21-2020, 09:33 PM Thread Starter
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2013 production changes

Did this production change correct the ring problem in the 2.4 engines? I understand that it was effective in May and if your production date is after that you might have a longer lasting engine?
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post #2 of 3 (permalink) Old 01-21-2020, 09:59 PM
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According to GM yes.
But my brother has a 2013 equinox with 100k miles that's burning oil like crazy. Having to add oil every 2 weeks. Hours was built in December of 2013 I believe.

So really no.
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post #3 of 3 (permalink) Old 01-21-2020, 10:11 PM
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My 2 cents ===>>>>

Yes to longer lasting...... you have a better chance of making it to 90,000 miles!!!

No.
The running change in May 2013, where GM improved the plating on the piston ring, ( and whatever else they did)
Did NOT SOLVE the oil consumption problem these GDI engines have.

These 2.4 liter ecotec LEA engines still will consume oil.
There are folks on these pages that have reported oil consumption issues with cars newer then 2013.

You must check your oil and top it up
Or
you will have timing chain issues..... or worse.


Xxxxxxxxxxyyyyyyyyyyyyyyzzzzzzzzzzzzz

Not much is known of the specifics of the 5-25-2013 running change piston ring upgrade
.... Below is from gm techlink.....

2.4L Ecotec Engine Oil Consumption
August 6, 2013
Excessive oil consumption on some 2010-2013 LaCrosse, Equinox, Terrain and 2011-2013 Regal models equipped with the 2.4L engine (RPOs LAF, LEA) does not require engine replacement. If excessive oil consumption is confirmed after an oil consumption test, new pistons and piston rings should be installed.

Piston Ring Coating
The top compression ring in the new kit has a more robust coating on it that is designed not to wear as quickly as the original coating. Tests indicate that it wears about 4-5 times longer than the original coating.

If the top compression ring is worn, it will allow combustion pressure past it, which causes the oil control rings to be less effective and results in excessive oil consumption.

On 2010-2011 vehicles built before March 2011, there is a strong correlation between leaking high pressure fuel pumps diluting the oil and causing the ring wear. Due to this, check the fuel pump, balance chain, balance chain tensioner and timing chain for the proper part numbers. The updated fuel pump has an enhanced seal.

If these updated parts have not been installed during a previous repair, they should be replaced when the pistons and rings are replaced. Use field action #12313 if the balance chain and/or fuel pump is replaced.

Zebra Stripes
The pistons must be replaced because as the rings wear down, it starts to widen the piston ring groves. The worn grooves will not retain the new rings correctly.

The “zebra” stripping on the bore surface (Fig. 1) is not an indication of a cylinder bore abnormality, but rather a transfer of the ring material as it was worn down. The bores are still uniform and the new rings seal. The validation of the new ring pack was done on used blocks that had zebra striping. It’s not necessary to do any surface treatment to the zebra striped bores when installing the new pistons and rings.
^^^^^ techlink_aug_f01. ^^^^^

2012 Traverse with Elite E2 X catchcan
Three Equinox with 2.4 engine, 2013, 2016 and 2016
2017 equinox with 3.6 engine with Elite E2 X catchcan
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