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YOUR RESEARCHBore Scoring 101
Reported or suspected cause
turning into a pandemic
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Leading evidence: 'turning into a pandemic' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'turning into a pandemic' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean before assembly' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
I don't remember the specific details but something about metal debris from manufacturing not being cleaned sufficiently.
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Performed · outcome unconfirmed
Hyundai replaced quite a few motors under warranty for this issue.
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Suggestion
This correlates to what LN recently put out about ensuring the fresh cylinders and pistons are absolutely clean before assembly.
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Suggestion · Original poster
Anyways, took it apart last night and Jake is right, if you can see scoring at the top of the cylinders from the spark plug hole (I actually inspected the engine before I bought it with a borescope), it's going to be way worse below.
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Suggestion · Original poster
Anyways, took it apart last night and Jake is right, if you can see scoring at the top of the cylinders from the spark plug hole (I actually inspected the engine before I bought it with a borescope), it's going to be way worse below.
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14 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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I have posted before that my daughter's 2013 Hyundai Elantra has a TERRIBLE tick in the engine. Started with less than 50K miles. The car is a rebuilt title, so no factory warranty.
I just bought a used engine for $500 so I could rebuild it and then put it in her car. Parts are cheap! An oversized piston and ring kit for the four cylinders is $80! I figure for about $1200 I'll complete the rebuild, which includes the $500 engine purchase and machine shop services to bore the cylinders. No nickies for this engine.
Anyways, took it apart last night and Jake is right, if you can see scoring at the top of the cylinders from the spark plug hole (I actually inspected the engine before I bought it with a borescope), it's going to be way worse below.
A short video.....need to work on my video skills.....
You Tube
And going back to the original video with the debris in the pan from her engine, I'm sure the scoring is TERRIBLE in that engine. She went to college in Minnesota, where it has freezing temps. People in Canada complained about these engines first.
You Tube
I know you're being a bit facetious, but I would predict these pistons would have cracked or the shedding of metal would have caused severe damage that would lead to engine failure similar to what we've seen in the M96. This problem is turning into a pandemic.
haha... yea, sometimes the industry solves one problem and creates more as a result. Have you seen where manufactures are putting pairs of injectors on DI cars? One for combustion and the other to wash the valves.
Scoring on the Elantra was a factory problem. I don't remember the specific details but something about metal debris from manufacturing not being cleaned sufficiently. Hyundai replaced quite a few motors under warranty for this issue.
This correlates to what LN recently put out about ensuring the fresh cylinders and pistons are absolutely clean before assembly. Lots of tiny particulates that can get trapped and score bores from new, first start. Good project and thanks for sharing, Paul.
I've given up being too concerned about the big things. What's next? I've already done two IMS bearings. My only change on this matter is I am not running in cold weather now (under 40F). I put away for the winter anyhow due to salt so not really an issue.
Now seeing plenty of 996/Boxster's on the road, I bet the majority have not a clue about any of this. Envy them sometimes.
I will continue to do the maintenance stuff such as water pump/coolant tank/AOS to allude issues when driving but the rest is not in my hands without sending a lot more money. I love the car but not enough to justify spending what I paid for it.
I think I remember seeing a post on Reddit where someone worked at a dealership and they just had Hyundai crate engines all over the place because of this issue.
Bore scoring is attacking modern engines across the board. I have been consulting with others like us that deal with domestic, and Asian engines who are just starting to see this.
GM 4&6 Cyl eco-tec's, Ford Eco Boost, Fiat's, I've heard the new Alpha's are already seeing too many engine out services..
Honda is still dodging it on some engines with AL blocks and steel sleeves.
The ones without bore scoring are having piston skirt separation issues ...
DI diesels also..
Technology is not always your friend. LOL
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