Tremek Car Video Forum

sick boy · 07 Jan 2008, 03:00 pm

Hey all. I have this odd rattle that sounds like a loose heat sheild, but it's coming from under the valve cover. It only does it at certain RPM and when I lift the throttle. Does anyone have a clue as to what it might be?

It's a KA24de, and at first I thought it was a PCV valve but I don't think it is now. Oh, and does anyone have an exploded view of a KA that I can look at?

01mmmz28 · 07 Jan 2008, 04:11 pm

find someone with a car stethascope (sp?) That will help pin point the noise better. Under the valve cover.....Hmmm.....cracked valve spring is my guess.

sick boy · 07 Jan 2008, 05:30 pm

it's toward the front of the valve cover if that helps. there is a vacuum hose that comes off the intake tube and goes to an metal elbow on the valve cover, the rattle is coming from around that or the timing chain.
im just trying to avoid taking it to a shop that will try and rip me off and still not fix it.

01mmmz28 · 08 Jan 2008, 03:50 am

got any friends that are car guys? because diagnosing an under hood rattle can be tricky sometimes, as sounds resonate off of metal parts. You could possibly have sheared some teeth off the timing chain sprocket. Not good either. Get it checked out soon.

JGT8229 · 08 Jan 2008, 12:15 pm

try and get a video of it

sick boy · 09 Jan 2008, 05:52 pm

sorry don't have any way of getting a vid.

i've used a screw driver against my ear to try and find it. i hope its not sheared teeth. i baby it and it's still running good, so i don't think its that. i'm thinging its just a loose chain. she's got a dr's apointment friday morning so we'll see.

v_dub_ya · 09 Jan 2008, 06:33 pm

If that chain breaks

bad news

Like z28 said, valve spring or a rocker arm?

sick boy · 10 Jan 2008, 02:50 pm

it doesn't have rocker arms, it's dual over head cams. sorry i didn't say it was in my 240sx.

sick boy · 11 Jan 2008, 10:04 am

hey it ended up being a loose timing chain slapping a useless guide. Nissan put out a notice that the guide causes noise problems and can be taken off without hurting the engine. so there ya go, thanks for the help.

07 Jan 2008, 03:00 pm	#1 (permalink)
sick boy Regular Tremekian Join Date: Sep 2005 Location: Indiana Posts: 178 sick boy's Gallery	Odd Rattle Hey all. I have this odd rattle that sounds like a loose heat sheild, but it's coming from under the valve cover. It only does it at certain RPM and when I lift the throttle. Does anyone have a clue as to what it might be? It's a KA24de, and at first I thought it was a PCV valve but I don't think it is now. Oh, and does anyone have an exploded view of a KA that I can look at?

07 Jan 2008, 04:11 pm	#2 (permalink)
01mmmz28 Obsessed Tremekian Join Date: Dec 2005 Location: On a national search to find burgh a dentist that will work on baboon teeth. Posts: 5,814 01mmmz28's Gallery	Re: Odd Rattle find someone with a car stethascope (sp?) That will help pin point the noise better. Under the valve cover.....Hmmm.....cracked valve spring is my guess. __________________ 2001 Z/28 Cam, exhaust, gears = a lot faster than your mustang. Extending the smack down back hand upon ricers and stangs since July 2001.

07 Jan 2008, 05:30 pm	#3 (permalink)
sick boy Regular Tremekian Join Date: Sep 2005 Location: Indiana Posts: 178 sick boy's Gallery	Re: Odd Rattle it's toward the front of the valve cover if that helps. there is a vacuum hose that comes off the intake tube and goes to an metal elbow on the valve cover, the rattle is coming from around that or the timing chain. im just trying to avoid taking it to a shop that will try and rip me off and still not fix it.

08 Jan 2008, 03:50 am	#4 (permalink)
01mmmz28 Obsessed Tremekian Join Date: Dec 2005 Location: On a national search to find burgh a dentist that will work on baboon teeth. Posts: 5,814 01mmmz28's Gallery	Re: Odd Rattle got any friends that are car guys? because diagnosing an under hood rattle can be tricky sometimes, as sounds resonate off of metal parts. You could possibly have sheared some teeth off the timing chain sprocket. Not good either. Get it checked out soon. __________________ 2001 Z/28 Cam, exhaust, gears = a lot faster than your mustang. Extending the smack down back hand upon ricers and stangs since July 2001.

08 Jan 2008, 12:15 pm	#5 (permalink)
JGT8229 Obsessed Tremekian Join Date: Jun 2005 Location: boston/worken on the 5.0 Posts: 8,659 JGT8229's Gallery	Re: Odd Rattle try and get a video of it __________________ 5.0 pushrod power Vdubs4life

09 Jan 2008, 05:52 pm	#6 (permalink)
sick boy Regular Tremekian Join Date: Sep 2005 Location: Indiana Posts: 178 sick boy's Gallery	Re: Odd Rattle sorry don't have any way of getting a vid. i've used a screw driver against my ear to try and find it. i hope its not sheared teeth. i baby it and it's still running good, so i don't think its that. i'm thinging its just a loose chain. she's got a dr's apointment friday morning so we'll see.

09 Jan 2008, 06:33 pm	#7 (permalink)
v_dub_ya Pulling the belts tight Join Date: Jan 2005 Location: Reluctantly crouched at the starting line Posts: 10,745 v_dub_ya's Gallery	Re: Odd Rattle If that chain breaks bad news Like z28 said, valve spring or a rocker arm? __________________

10 Jan 2008, 02:50 pm	#8 (permalink)
sick boy Regular Tremekian Join Date: Sep 2005 Location: Indiana Posts: 178 sick boy's Gallery	Re: Odd Rattle it doesn't have rocker arms, it's dual over head cams. sorry i didn't say it was in my 240sx.

11 Jan 2008, 10:04 am	#9 (permalink)
sick boy Regular Tremekian Join Date: Sep 2005 Location: Indiana Posts: 178 sick boy's Gallery	Re: Odd Rattle hey it ended up being a loose timing chain slapping a useless guide. Nissan put out a notice that the guide causes noise problems and can be taken off without hurting the engine. so there ya go, thanks for the help.

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