Knocking sound

Xtian · Post by **Xtian** » Sat Oct 27, 2007 12:37 pm

http://www.youtube.com/watch?v=J-0eWiGIJZQ

What do you think might be the problem? And it makes this sound only when the car is cold.

Post by **racer12306** » Sat Oct 27, 2007 12:38 pm

Piston slap maybe?

Xtian · Post by **Xtian** » Sat Oct 27, 2007 12:43 pm

racer12306 wrote:Piston slap maybe?

is that bad?

MoxHair · Post by **MoxHair** » Sat Oct 27, 2007 1:11 pm

all neons slap.. but yours is really loud.

Kelevra · Post by **Kelevra** » Sat Oct 27, 2007 1:35 pm

damn that's loud!

donno what to say, is it still under warenty?

Xtian · Post by **Xtian** » Sat Oct 27, 2007 1:42 pm

time to sell .... again .. this is the 5th neon that I am going to sell.

Kelevra · Post by **Kelevra** » Sat Oct 27, 2007 1:45 pm

Xtian wrote: time to sell .... again .. this is the 5th neon that I am going to sell.

damn. next time, go out on a cold morning to look for a neon.

Xtian · Post by **Xtian** » Sat Oct 27, 2007 1:46 pm

the good thing is that I can sell it for about $5000 and I bought it for $2000

but still it is very silent after 3 mins of idle

Kelevra · Post by **Kelevra** » Sat Oct 27, 2007 2:15 pm

nice, you pick up 3k! I say dish out for a SRT4 man

I would. 5k on a down payment on that sucker. ur in business

Post by **racer12306** » Sat Oct 27, 2007 2:50 pm

and then pay more for insurance than your car payment.

FTL

MoxHair · Post by **MoxHair** » Sat Oct 27, 2007 5:02 pm

^ Frank es Loco.

Payment $350
Insurance $150.

The Insurance on my SRT is actually lower than it was on my R/T

Nalayah · Post by **Nalayah** » Sat Oct 27, 2007 7:34 pm

racer12306 wrote:Piston slap maybe?

What exactly is that? Sorry to hijack.

Post by **occasional demons** » Sun Oct 28, 2007 6:33 pm

When the enginge is cold (and sometimes at operating temp) the pistons are a bit too small for the bore, so when they change direction at the end of the stroke they cock in the bore and the skirt of the piston slaps the cylinder wall.

Where else can you put cock, skirt and slap in a paragrah, and be writing about something not sexually related!

Edit: after watching that again it seems like the knock is in time with the belt marks going around. but it could just be that one cylinder is making the noise so the belt would be close to the same spot every time. Can't see a belt making that much noise.

Nalayah · Post by **Nalayah** » Mon Oct 29, 2007 12:05 am

Sigged, thanks for the info

.

Kelevra · Post by **Kelevra** » Mon Oct 29, 2007 2:03 am

Damn, I want that as my sig XD

BlackRoseRacing · Post by **BlackRoseRacing** » Mon Oct 29, 2007 6:16 am

That noise is not piston slap....
For the heck of it get some penetrating oil(WD40,JBlast) whatever your prefrence, and while the car is idling cold like that, spray it on the PS belt to see if the noise goes away. Be warned though, there will be splatter...

Post by **occasional demons** » Mon Oct 29, 2007 8:18 am

BlackRoseRacing wrote:That noise is not piston slap....
For the heck of it get some penetrating oil(WD40,JBlast) whatever your prefrence, and while the car is idling cold like that, spray it on the PS belt to see if the noise goes away. Be warned though, there will be splatter...

I was kinda leaning towards the same. Can also get a 17mm wrench and put on the tensioner for the a/c slash power steering pump belt and CAREFULLY pull (or push) so there is enough slack for the accesories to stop moving that will eliminate any noise from the belt, tensoiner, PS pump, and A/C. The only other thing that I've experinced making a knock is a water pump but that was on a big block chrysler and it wasn't as consistent as yours. Besides you can't disconnect the belt to the waterpump on a 2.0 without making noises that you don't ever want to hear!