Nissan Rogue Forum

THIS VIDEO SHOWS THE COLD PISTON SLAP OUR ENGINES(like many engines now a days have). LOOK AT THE PLAY- YOU REALLY WANT TO TAKE A COLD ENGINE AND REV THAT TO 2,000rpm?? LET IT IDLE AT 750rpm AND WARM AND EXPAND THOSE PISTONS TO NO LONGER HAVE PLAY.

Forged piston slap - YouTube

I do understand how a 4 stroke engine works, thank you.

A cold, freshly started engine runs well above 1000 rpm at cold idle, typically 1250-1500rpm.

An awful lot of the USA gets cold in the winter, some of it very cold. How come the owner's manual doesn't have a warning label in big red letters telling us that we're going to cause severe engine damage if we don't let the car idle for 5 minutes before driving it? Why doesn't the little electronic display tell me not to put the car in drive because its not warm enough yet? Why doesn't the computer lock out the shifter and keep me from taking it out of park? Seems like if those parts were that brittle in cold temps that the automakers would try to prevent having to warranty engines...be a big money saver.

I posted a Car Talk link because in another thread you used one to try to prove a point about using regular versus premium and they supported your position, yet they provided no insight into the engineering of the actual vehicle. In this case they do not support your position so you dismiss their information. Can't have it both ways.

Piston slap is a fact of life. We all have to live with it. But millions of vehicles with hundreds of thousands of miles each on original motors that are driven in cold climates in the manner I've outlined, along with automaker's recommendations say its harmless. My 2000 Chevy Silverado 6.0 has 147,000 on it right now. I use it daily as my commuter car and as a work truck. I get in when its 10 below, start it and drive it gently after I get myself situated. 30 seconds or so is all you need.

As in the other thread, I'm going to bow out here. Neither of us is accomplishing anything other than having a fun debate.

Good talking with you!

"A cold, freshly started engine runs well above 1000 rpm at cold idle, typically 1250-1500rpm." - for less than 15-30seconds before it goes to idle at 700-800rpm

Why doesn't the little electronic display tell me not to put the car in drive because its not warm enough yet? Why doesn't the computer lock out the shifter and keep me from taking it out of park?
because if it was an emergency situation and the car wouldn't move because its 32degrees outside and you died- your family would sue that car maker.
the same reason the car doesnt stop you from over-revving it by driving at 6,000rpm while in 1st gear on the highway.
the same reason the car doesnt stop you from going 100mph
the same reason the car doesnt stop you from turning the wheel sharply at 65mph.

"I posted a Car Talk link because in another thread you used one to try to prove a point about using regular versus premium and they supported your position, yet they provided no insight into the engineering of the actual vehicle. In this case they do not support your position so you dismiss their information. Can't have it both ways."
My article from USA TODAY didn't provide insight on the engineering of the actual vehicle? GUY- IT HAD THE ENGINEERS OF HONDA & GM TELLING YOU PREMIUM IS A SHAM, AND NEITHER OF THEM USE IT! Your LINK was from a no-body blogger answering a question from a female. TWO DIFFERENT STYLE OF ARTICLES.

listen you do as you please, but im telling you- starting a cold engine and driving off- is detrimental. I DONT EVEN WANNA TALK ABOUT WHAT IT DOES TO AN AUTOMATIC TRANSMISSION(which runs on hydraulic pressure- and fluids are thicker and harder to move at cold temps) BUT YOU DO AS YOU PLEASE.

They have this on the Toyota Yaris. The cold light is to advise you that the engine isn't sufficently warmed up, and while it can be operated while lit, it's not advised, and performance will be reduced untill the engine reaches proper temp.

__________________
Brilliant Silver '11 Rogue SV w/SL AWD

thats because its the right thing to do. now a days everyone is so "eco-friendly" that they are forgetting common sense and only doing whats popular. people will blow seals out, and wear engine parts faster, place the oil pump in harsh conditions trying to pump thick oil, etc.
ITS NO SECRET WHEN AN ENGINE IS COLD, ITS WASTING MORE FUEL WORKING- WELL WHEN YOU PLACE IT UNDER LOAD AT 2,000 RPM TO LEAVE YOUR DRIVEWAY= it wasting even more fuel!

cold oil/fluids = thicker
cold metal/seals = brittle.
engine compression = very high
cold moving parts = less flexibility.
automatic transmissions run on = hydraulic pressure.
--------------------------------------
add all of those simple variables up and you have common sense to let the engine warm up for at least 5mins.