Metal Flake in Oil - Low Oil Pressure - Next Steps?

SG4247

Wow!

Did not expect that. I dont get how that could happen on a 90k mile motor. I know these engines will go 200k plus miles with proper maintenance.

So what would’ve caused retainer failure, as I never have heard of an issue with OEM retainers.

We’re the broken retainers all intakes?

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NA on E85 - 12.402 @ 112 mph
100 shot E85 - 11.589 @ 117 mph
JWT C2 cams rev Base Circle & Titan Valves

Rusty

That's a new one. I've seen broken retainers. But to have them wear like that, no.

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浪人 - 殺し屋
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zisfor_nizmo

I ran out to check the heads: 3 valve spring retainers were broken each from the middle cylinder’s intake side (2 in one bank 1 in the other, the 1 only has about 20% of it left….ready to drop)

I’m not entirely sure what caused this, googling said an over rev could have caused it. I think I’d remember if I money shifted the car…. Also coinciding with the gallery gasket failure seems bit too coincidental.

I think some combination of no oil in the heads, a build up of heat, and some stress lead to the the retainers snapping off. Those fragments sheared and shredded on their way to the oil pan where they sat all polished and shiny until we found them.

I also haven’t read anything about something like this before. I don’t believe this is a common failure point. My mechanic works on a ton of 300zxs, 350 and 370zs, he’d hadn’t seen anything like this either. At least now we know, if you see pieces shaped like that, it’s you retainers