Engine knock when cold??

hello i noticed this morning when i started my car i had a knock sound coming from the engine that goes away when the car warms up. Anyone have any idea's?

 

post a video or be more descriptive. Could be anything from a heat shield to piston slap to rod knock.

 

ok ill post a vidro tomorrow moring if its cold enough only does it when its 30 or lower

 

Normal.

I'm not kidding.

 

Thank you!

 

I'm trying to upload a video but won't let me. The ticking noise seems to always be there. Can only hear it with radio and heat off!?

 

Ummm... so its a ticking or knocking sound? Upload to youtube or photobucket or something and link to it.

 

Ticking might mean that you need a valve job, a knocking could be piston slap (common for subaru's and minor cases you can't hear it after it warms up) Any car info....?? Year/Model/Miles?? History?? MOds?

 

2004 wrx exhaust but stock other than that

 

this is what it sounds like when its cold not as loud when hot?

 

Did the video work?

 

It is not loud enough. Try putting the phone on the strut top or something.

 

Ok ill try later

 

If it goes away when warm its piston slap. Its a pretty common subaru quirk.

 

Ya the loundness goes away but I hear a ticking always when my radio and air is off.

 

Every single Subaru I have owned (3) have all had this, including the tick, my 2.5i had the most tick, once it became louder I would change my oil and it would quiet down. It's Subaru love slapping

 

The tick is likely valves. Post a better video or swing by a meet.

The valve clearances tighten up over time (not good if they go out of spec) and get quieter (most people consider this good lol). So in short, get to know the noise(s) and learn to love them... or burn it to the ground.

 

In theory they should get louder with time, the valve is slamming shut/pounding the seat. This is why you get cracked/burned valves on 2.0L wrxs. Adjust your valves at 105K, but the earlier the better.

 

Where and when do people meet?

 

Welcome to the world of Subaru, switching from DSMs (3 of those pieces of...) to the WRX I thought my car was broken so many different times from all the weird noises/shakes I didn't have with my DSMs that I just learned to live with it...Changed oil with Schaffers 5w-30 synthetic and starting is a lot nicer from what it was when I first bought the car. Are you due for an oil change and are you running synthetic or what weight oil? That or like AWDimprezaL said about the valve lashing. No big deal. Just gotta get used to it in the cold.

 

Ya I just changed it I use rotela t6 thanks for the info.

 

There's a meet tonight. There's also an entire Events sub forum.

 

not the best bu this is how it ticks all the time this time the car is warm

 

What was reading on your coolant temp gauge when you took this

 

Normal temp?

 

The reading is at the full mark.

 

I know sorry the crappy video (iPhone) ill see if u can make it.

 

Ya same here. Does everyone meet every Tuesday?