does anyone know if the VQ30 has molybdenum coated pistons like the VQ35? if so, is Moly more susceptible to corrosion if exposed to solvents and cleaners (like Seafoam, ATF, lube control, etc)? the reason I ask is because I'm looking at different ways to clean the carbon out of my combustion chamber, and i don't want to damage the coating on the cylinders/pistons/valves (if there is any).

 

try this is in the all motor forum...most of the idiots that come in here are all newbs and i know they have no idea for the answer to this question ... neither do i, wish i could help

 

As I understand it, all VQ series motors have molybdenum coated internals.

How many miles are on your car? How much carbon could be in your combustion chambers? A well maintained VQ is a very clean motor and I doubt you'd have any serious carbon buildup. Unless you've been running rich or burning oil or have had some other serious problem, I don't think you have much to be worried about. Mine has 214,000 miles on it and I'm not in the least bit concerned about carbon.

The question is: Has anyone done a complete teardown on a 250,000+ mile VQ30DE?

When my car finally does die, and I don't anticipate that to be any time soon, I want to tear the motor down and check it out just for the hell of it. I'd like to see how much wear there will be on moving parts, how much carbon there might be in the combustion chamber. That's not going to be for at least another 100k miles though. :P

 

My motor has 74k miles. here's a pic of my carbon problem....
I'm not burning oil, and I don't know if I'm burning rich. I get about 23MPG with a mix of stand still traffic jams and HWY driving....

here's also a recent pic of my plugs...

 

wow i love seeing the pics man, try FP or techron, or mabye a big dose of MMO.