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Discussion Starter #1
Help, my engine produces "gold flakes"!
Removed today oil pan from my Gen4 engine just to check if all looks good from the botton and saw quite many copper flakes in oil pan!?
Made a photo of it. Has anyone had similar issue?

There are no larger pieces, only flat flakes (0.5 to 1.5mm) you see on picture.
Did cut open the oil filter and found copper dust there too.
Upwards from oil pan everything is very clean and cannot see any debries there.

Where can it come from?

I can exclude clutch and cylinder head, it is off and valve clearances were good.
 

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Bottom end bearings. I'd replace them NOW before you spin one and need a crank/head/valves/oil pump. It's a bit expensive to have them done but it's 1/2 the price of repairing the motor after the fact. Gives you an excuse to have the crank lightened too :)
 

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Supercharged Mod
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Yup. "Badness has occurred." Pull it apart now, before it does more damage.

If you find out that a rod bearing has gone bad (which is likely), measure the journal and the affected rod very carefully for out-of-round or out-of-tolerance.
 

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Discussion Starter #4
Shit, I was hoping something from gerbox area. Did not know crank/conrod bearing produce copper color.
 

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Servo's Eliminatus ;)
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Crank main or rod bearings are the only 2 places for them to come from.
Do loke what was said earlier and pull the crank now or you will trash the motor.
 

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What everyone else said. Not good and looking at a big repair bill. Crank will need repair or replacement if the bearings are starting to shred. I'm just getting my crank back and will be starting the rebuild soon. It sucks.
 

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Help, my engine produces "gold flakes"!
Removed today oil pan from my Gen4 engine just to check if all looks good from the botton and saw quite many copper flakes in oil pan!?
Made a photo of it. Has anyone had similar issue?

There are no larger pieces, only flat flakes (0.5 to 1.5mm) you see on picture.
Did cut open the oil filter and found copper dust there too.
Upwards from oil pan everything is very clean and cannot see any debries there.

Where can it come from?

I can exclude clutch and cylinder head, it is off and valve clearances were good.

Wow, how many miles on that?
 

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Discussion Starter #11
Wow, how many miles on that?
7000 street miles from previous owner. Plus I did one race season on it.

Oil and OEM filter had ca. 1000 miles. Motul 300V Factoryline (Ester core)
Is it too many miles for race track use?
 

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7000 street miles from previous owner. Plus I did one race season on it.

Oil and OEM filter had ca. 1000 miles. Motul 300V Factoryline (Ester core)
Is it too many miles for race track use?
Wait, you did 1000mi of track use on a single oil change?
 

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Yes, somewhere 800..1000 not less, not more.
That's WAAAAAYYY too many track miles on one oil change! I did roughly 2000km this season, here's most of my oil with the exception of one jug. Roughly 8 oil changes, 6 filters.


Oil shoild be changed every other track day at a minimum. If using 300V is too costly to change the oil that frequently switch to a cheaper oil.
 

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Discussion Starter #16
Will keep in mind to change oil every 300..500km.
What are other common rookie mistakes?
Probably it's good point to put in kit bushings as I'm having headwork too?
 

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Will keep in mind to change oil every 300..500km.
What are other common rookie mistakes?
Probably it's good point to put in kit bushings as I'm having headwork too?
Kit bearings are no longer available unfortunately.

Every 300km of track miles should be the limit. I don't measure by mielage. Every track day or every race weekend, whichever comes first.
 

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The Pace
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Not right and use amsoil. 1000 miles is nothing on oil. 7k miles on a g4 engine is nothing. My first thought is that prior owner did something stupid.
 

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Not right and use amsoil. 1000 miles is nothing on oil. 7k miles on a g4 engine is nothing. My first thought is that prior owner did something stupid.
Track riding is different then looping. Even superstars that use amsoil in their race bikes change it just as often. With an amsoil filter of course.
 
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