knocking sound question

[thec1arity]

A couple months ago my car developed a knocking sound when I turn if off. It doesn't do it when running to any degree. It's just when I turn it off.

What's the first thing I should check out? What could it be?

Thanks

EDIT: It's the 420a 2.0L GS.

 

[jambro]

Have you checked any motor/tranny mounts?

 

[KYAWD]

Narrow down where its coming from have a friend help you out.

 

[thec1arity]

Have you checked any motor/tranny mounts?

I'm sure they all need to be replaced.

 

[Talon IV]

Also valve springs have a tendency to make a knock or a ping noise after you shut the car off. But yeah try to narrow it down and do check your motor/tranny mounts

 

[thec1arity]

Also valve springs have a tendency to make a knock or a ping noise after you shut the car off. But yeah try to narrow it down and do check your motor/tranny mounts

The worst part about that is I wouldn't even know where to begin to change them.

 

[TrevorS]

The worst part about that is I wouldn't even know where to begin to change them.

I wouldn't worry about that yet, step one is to identify the source of the noise (your mounts may be fine). As said, you need someone to help you -- one of you gets to stick his head in the engine compartment while the other shuts down the engine (probably several times).

 

[KYAWD]

Pay attention to timing belt side!

 

[thec1arity]

Pay attention to timing belt side!

I opened up the cover a couple days ago just to check the timing belt and everything looked out. What exactly should I be looking for?

 

[DsmJapSpyder]

valve's and spring's they knock , i had the same shit happen to me bro, on my old spyder

 

[TrevorS]

valve's and spring's they knock , i had the same shit happen to me bro, on my old spyder

Do you mean knock or tap or tick? Never heard of valves making a knocking sound before.

 

[thec1arity]

I tried to listen a bit more closely to where the sound is coming from today. It SEEMS to be coming from the driver's side.

 

[Deuce of Spades]

Not to take away from the op but my 96 GSX does the same thing but only about once a week. About 5 to 10 min after i shut he car off it makes a slow, deliberate tapping sound for 30 sec the it gets very rapid for a few seconds and stops. A minute later it goes thru this cycle again and this goes on for about 20 mins. To make matters more weird sometimes when i go to start the car it will barely idle until I give it gas. And the last time this happened it took about 10 min to start the car.

As I said originally this happens once a week, sometimes less, and i drive it everyday.