corvettenoob1

Cold start crank and rev to 2k. Makes a rod knock sound or some tip of rattling. if you can figure out the sound, that would be great because I am about to bring up a storm to the dealer for selling me a lemon at 34k miles.

To view vid your have search the link. Dont know why it only works that way. The mods I have are just an intake and a custom ark grip exhaust. Just straights with resonated tips.

leadfoot4

If I understand what you're saying, if you hit the key, and as soon as the engine "catches", you rev it to 2000 RPM, and you wonder why it's "rattling"?????













............maybe because there's not enough oil pressure at that point, and you're bouncing ALL of the rods off the crankshaft, the crank off it's bearings, and bouncing the camshaft around in it's bearings. In other words, YOU'RE turning the engine into a "lemon".

vettenuts

No video.

grantv

Piston slap probably, and if so it's totally normal until motor warms up. Are you revving to 2000 right when you start your car...?

runner140*

Turn the ignition switch to "on", for 5 seconds, let the engine run for 10 to 20 seconds, then put in gear and bring up to temp. As said above/before, don't turn your engine into a lemon.

corvettenoob1

I wait until the car idles and then rev to 2k after a few seconds of ldling. There are times it sounds like a bad knock then times it doesnt. Notice in vid that I wait a couple seconds after it idles then rev to 2k. You can hear it better in person,but it sounds like a piston slap but worse because I can hear it in the car rather than out.

If 10w40 is good for all season temps especially freezing and 100+ temps than Ill switch to that to next oil change. Maybe 5w30 isnt enough i guess.

What do you think of rotella t6? I know its diesel and turbo guys run it. I just dont want fouling spark plugs,o2s and cats.

leadfoot4

What are you attempting to do, by revving a cold engine, ANY COLD ENGINE, like that??

grantv

Wrong, all wrong...
1 - Your video link is not working as previously noted
2 - Also previously noted, WHY are you revving your motor at all after start up? Start it, and either let it IDLE for a while, or drive away slowly keeping the revs low. I've heard a neighbor do this with their car and want to shake his head, except he's mid 80's and I'd probably kill him doing it (intentionally or not).
3 - 5W-30 STANDARD synthetic is fine, leave it as is.

corvettenoob1

1. you have to post link in new window as stated to work

2. Once the car idles at optimum level it gets warm fairly quickly so once its close to 180 degrees I revved it.

3. I know its standard oil it just seems too thin if the car is noiser than a stock one thats older than mine.

Smoken1

My car sits in Park till almost operating temp. Same with all my vehicles

corvettenoob1

My full operating temp is about 200/210 so The degree difference shouldnt effect it THAT much. Would it?

Smoken1

You said on Cold start revving it to 2K.

corvettenoob1

If its not fully warmed up its still considered cold start. Normal op temps are 220+ and for me being 180 when I rev it is not at optimum temp level so therefore cold start. Like they said, wait until its at normal temp and I didnt fully allow it to warm up so its still cold start.

I didnt rev it right as the car cranked. When I let it idle it gets warm until its at normal temp. I started revving when it hit around 180

grantv

1 - Nothing like making it hard for people trying to help you. Still, I tried linking to no avail.
2 - OK, your car. I can't find it in a Corvette manual, but my BMW manuals stated to start motor and drive away immediately, taking it easy on the gas pedal until motor is warmed up. I do the same with my Z.
3 - Again, OK, your car.

grantv

Seriously curious, who is "they"? I've always been of the mind to start the car and drive right away...

corvettenoob1

The other posters.

The link worked for me after I copied it and pasted it in a new window.

As Granty said that he/she drives right away which majority of the world does because I see it everyday and especially when I visit friends and family and work aswell. So If the world does it yet People say its bad, then cars should have a bad resale value from all the repairs being done from cold start drive offs. Dealers do the same with their vehicles:start then drive off right away.

leadfoot4

The point is this......You SHOULDN'T start a car, especially if it's been sitting long enough to get "cold", then begin revving the crap out of it. But you don't NEED to start it and let it run for 10 minutes before moving it, either. Start the car and drive it EASILY for 3-4 miles.

FWIW, the oil in my C-5 doesn't get to full operating temperature (200*), until I drive 8-10 miles, minimum. I'm certainly not going to let it idle until the oil gets fully warmed, so I drive it easily until the OIL gets up to about 110-120* before I would think about "leaning on it". I concentrate more on oil temp, than water temp, as oil flow is more important to the engine's operation. The water flows no matter what the temp (assuming, of course, it's not frozen).

And yes, when my car is cold, it suffers from the well-known LS-1 "piston slap".....lasts for about 3-4 miles, until the cylinders begin to warm up.

C5blk

My 2002 does the same thing, sounds bad at start up. But you have to let them warm up....
After it warms up it is fine no noise and mine has a 101,000 miles on it. I would drive it across country with no worries. I use 5w30 synthetic.