VQ37 catalytic converter ceramic dust toasting an engine?

ImportConvert

Is this a carry-over myth from other Nissan engines? I'm doing some deep dive research into the QX50 before buying one, and am curious if the catalytic converter can actually toast an engine?

POS VETT

I have never heard of it and it sounds implausible.

crazy4oldcars

Same here. The dust would have to go against the exhaust flow to get to the engine.
I've also never heard of catalyst dust in this context. I thought out catalyst was a solid honeycomb?


Kirk B.

ImportConvert

200k expected engine life?

Spooler

That's a NO!!!

SouthArk370Z

While the best made cat can create dust as it ages (vibration, heat-cycling, etc) and there can be flow pulses in parts of the exhaust system, even if it was a lot of dust, the flow through the system would push the dust away from the engine. The pulses are much too small (and usually localized near the valve/manifold) to pull anything from the cat to the heads. But I'm no engineer, so prove me wrong.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

ImportConvert

I agree. To pull dust from a cat back into the exhaust valve, an engine would be a total pile of **** power and efficiency wise. That said, ive seen it mentioned on multiple forums about the VQ, so, i ask.

2011 Nismo#91

I don't know what car it was but I remember some older car having two catalytic converters and one what right on the exhaust manifold. That I could see getting some failed cat material if go back into the engine.

__________________
GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs