Cylinder head noise!

[deadeye]

Thats what I was thinking too. DSM lifters pretty much suck. Even new ones can be a problem. I guess pulling the V/C will shed more light. Maybe something is hitting the inside of the V/C? Like a socket that got left in there or something?

[tpunx99GSX]

Check for crankwalk. That sounds exactly like what mine just did a couple months ago. The noise quieter until after 2500 rpms, then it would get louder or until the car warmed up, Also the car ran fine except the knock sensor was pulling timing after 3000 rpms due to the noise so it was losing some power. I tried everything to get rid of the noise and it ended up being the main bearings and rod bearings.
None of the usual signs of crankwalk were there, such as the clutch pedal dropping to the floor or anything along those lines.
I was having a hard time pinpointing the noise, at one point it sounded like it was coming from the transmission area, so i changed the clutch and checked everything. Still the noise was there.
Changed out the lifters to the no tick ones and bled them, noise still was there.
Retorqued the head, and cams. Still there
checked the CAS.
Then finally pulled the oil pan and found the rod bearings were completly fucked, and the main bearings were pretty much out of spec. I ordered rod bearings from MAP but it was too late. I drove it to a meet and on the way there complete crankwalk, Then i parted out the car. :)

[4seasons69]

considering he just put cams in and because he described it as a "hollow" sound and it sounds like it's in the upper part of the engine it sounds like a valve train noise. valve train noises are usually a hollow sounding noise. one thing to listen for is does it sound like it's at crank speed or a little slower? valve train noises are at 1/2 crank speed.

[4seasons69]

if you want I can come help you pinpoint where it is and what's causing it. just give me a call

[tpunx99GSX]

considering he just put cams in and because he described it as a "hollow" sound and it sounds like it's in the upper part of the engine it sounds like a valve train noise. valve train noises are usually a hollow sounding noise. one thing to listen for is does it sound like it's at crank speed or a little slower? valve train noises are at 1/2 crank speed.

Mine sounded like it was in the head as well. It had me very confused, I pulled the valve cover like 10 times thinking it was the lifters or the cams. Checking shaft play doesnt take long and would be good to do no matter what.

[4seasons69]

Checking shaft play doesnt take long and would be good to do no matter what.

true it wouldn't hurt to check.

did you listen with a stethoscope or just by ear?

[GsXtUrBo98]

Just by ear... and trust me you can hear it!.

[4g63tcrazy]

Pull the valve cover off and take a look.

[tpunx99GSX]

true it wouldn't hurt to check.

did you listen with a stethoscope or just by ear?

I was using a piece of rubber hose to try and figure it out. I even had another guy come over and make sure i wasnt going nuts. He said it sounded like it was in the head as well, almost like it was coming from the CAS. But as it turned out it was rod knock on the #4 cylinder mainly.
Kinda wish i would have found this before putting more money into it, oh well, i still have the Stage 4 Competition clutch for sale if anyones interested. LOL

[GsXtUrBo98]

Just did and everything looks good...

It never made this noise before and when I parked it it didnt make it either...
I put cams and arp's along with new timing components and now it does.
The cams were all torqued to spec and so was everything else...
Timing belt was dead on with every tooth.