What does Oppo think of my pistons?

"ItalianJobR53 - now with added 'MERICA and unreliability" (italianjobr53)
12/22/2018 at 11:16 • Filed to: None

I bought one of those boroscope thingies off of Amazon. I have no clue how bad these are. Help!

The photos aren’t the highest quality, but if anyone can infer anything, it would be helpful.

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DISCUSSION (16)

BeaterGT > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 11:39

Seems like there are some clean explosions going on. Don’t know if that is just buildup on the edge of the piston. Comparing with the corresponding spark plug should give you a better idea of what is going on if anything .

ItalianJobR53 - now with added 'MERICA and unreliability > BeaterGT
12/22/2018 at 11:42

Plugs are completely dry and these is no sign of burning.

I was worried about what looked like pitting to me on pistons 1 and 3.

Long_Voyager, Now With More Caravanny Goodness > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 11:53

Likely just poor casting from the factory.

vondon302 > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 11:54

I see what you mean but really don’t know what it’s supposed to look like. Could just be p itting in some carbon buildup?

ItalianJobR53 - now with added 'MERICA and unreliability > vondon302
12/22/2018 at 12:17

Could be I suppose.

ItalianJobR53 - now with added 'MERICA and unreliability > Long_Voyager, Now With More Caravanny Goodness
12/22/2018 at 12:17

Hmm. Thanks!

Spanfeller is a twat > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 12:41

I’m not an expert but...

I doubt quality of casting varies so abruptly between four pistons, but it doesn’t look a lot like carbon either?

Get one of those carbon-buildup cleaner thingamajig that goes mixed with your petrol and check again in a week i f something has changed.

But if the car is running OK I don’t see an issue, granted, maybe you’re running rich, so check the relevant sensors, and also do a leak test if necesary.

diplodicus forgot his password > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 12:47

Looks similar to mine when I did that so I wouldn't worry. I think that's just a bit of carbon build up and maybe some corrosion from condensation from short drives. I'm not an expert. But you can still see cross hatching on the cylinder walls in some of those pics so I think you're in good shape.

GoodIdeaAtTheTime > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 13:11

It honestly looks like light damage from detonation from low quality fuel. Usually see that from people that run 87 in a car that requires 91. Piston 3 looks like it may have had moisture sitting in it for some time...

ItalianJobR53 - now with added 'MERICA and unreliability > GoodIdeaAtTheTime
12/22/2018 at 13:43

Thanks!

I was doing short driven when I was at school earlier this year when it was -10 to 0 F outside. That may explain the moisture.

ItalianJobR53 - now with added 'MERICA and unreliability > Spanfeller is a twat
12/22/2018 at 13:45

Car is running well, no issues.

I’m in the process of putting a smaller SC pulley, lets see how the car takes to that.

Thanks for you input :)

RacinBob > GoodIdeaAtTheTime
12/22/2018 at 14:20

I agree with the observation that it might be light detonation. That is what it looks like to me....

Spanfeller is a twat > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 14:53

Excess buildup could be an issue, specially if its an interference motor

ItalianJobR53 - now with added 'MERICA and unreliability > Spanfeller is a twat
12/22/2018 at 15:19

Its not an interference motor. Quite low compression too, 8.3 i think

Spanfeller is a twat > ItalianJobR53 - now with added 'MERICA and unreliability
12/22/2018 at 15:59

Such low compression is just asking for more boost . its gonna end up great!

ItalianJobR53 - now with added 'MERICA and unreliability > Spanfeller is a twat
12/22/2018 at 16:07