Valvetrain noise

**chieftransam** · 02-22-2008, 03:48 AM

Is it common to have a loud valvetrain?? Mine is loud and is noticeable as I drive by places and it echoes back. I'm not sure if it's the lifters or what. Any input on this? I just want it to be quiet. I have the stage II cnc ported heads and a 224 .581 112 cam. It sounds like a tapping or ticking noise. It's definately not a knock though.

**astyles** · 02-22-2008, 03:50 AM

these motors are just make noise.......some days i swear mine is coming apart any minute

**slims00ls1z28** · 02-22-2008, 11:10 AM

The cam is going to make it sound like a sewing machine, no real way to get around that.

**chieftransam** · 02-25-2008, 05:53 AM

so it's always going to sound like that? I don't like it... but I love the way she runs..lol!

**Loudz28** · 02-27-2008, 09:15 AM

im have the same sewing machine noise , and i can hear it inside my car with the windows up. i posted over in ls1tech and people have suggested checking the pushrod length, rocker arms losing their needle bearings, and to retorque everything.

anyone else got anything?

**Marc 85Z28** · 02-27-2008, 09:53 AM

Install some LS7 lifters and correct length pushrods.

**Loudz28** · 02-27-2008, 10:14 AM

currentlyhave comp 918s and hardened 7.4 pushrods.

**OnEbAdReDSS** · 02-27-2008, 10:41 AM

i got the same noise but kinda goes away after warming up but some times i just stays there... motor is stock with 107,000 miles

**Marc 85Z28** · 02-27-2008, 10:49 AM

Originally Posted by Loudz28

currentlyhave comp 918s and hardened 7.4 pushrods.

That's nice. But that's neither an LS7 lifter nor the correct length pushrod!

**PFM** · 02-27-2008, 11:31 AM

Exaust leak? The echoing back part caught my attention. My headers came with EGR but was blocked off. The EGR tube where it attachs to the primary developed a crack that was BIOCH to find. It finally cracked off an a MIG made short work of the hole. Its hard to believe but that little piece that broke off weighs several #s because it made out of the same stainless steel as the headers. I guess the vibration of the engine developed a stress crack.

**chieftransam** · 02-28-2008, 04:47 AM

I've had my car checked numerous times for an exhaust leak and they all tell me everything is fine. Other people say it could be either the gold springs I have or the lifters?

**bamaz28** · 02-28-2008, 06:09 AM

factory lifters still in it?

**chieftransam** · 02-28-2008, 09:48 AM

yeah still factory lifters, but everything inside the heads are from patriot--even the new pushrods.

**bamaz28** · 02-28-2008, 10:03 AM

if cam has been changed also new lifters should have went in with it.
i actually have freind that works for patriot performance, he use to have his car on their website as a customer. his name is Vann

**Marc 85Z28** · 02-28-2008, 10:11 AM

Originally Posted by chieftransam

yeah still factory lifters, but everything inside the heads are from patriot--even the new pushrods.

What size pushrods? Unless the heads have been milled a lot and you're running a thinner than stock head gasket, you should be OVER 7.400"

**greenvilleTA** · 02-28-2008, 04:59 PM

With my old motor, I had a TR230/224 with the 918 springs and TR hardened pushrods (stock length) and it was ticking pretty loud...even concerned the shop guys. When I build my new motor, I put a 232/234, but changed to comp r-series roller lifters and used a pushrod length checker to find my old pushrods were too short. Got the correct length and my new motor is almost silent in the engine bay. I'm a believer in making sure the pushrods are the correct length now. Especially since in my old loud motor, I had a valve hit my piston at high RPM and destroy a head, piston, etc...

**chieftransam** · 02-28-2008, 05:25 PM

well I got the h/c setup from patriot. Also they set me up with a complete package to include what I thought was the correct size pushrods. I would guess 7.4? I honestly don't know. (I have a 224/224 .581/.581 112 lsa with stage 2 cnc ported heads 59cc)

**TACE02** · 02-28-2008, 07:20 PM

sounds to me you have correct length, I doubt Patriot would send the wrong length knowing the setup... Yours is similar to mine, stage 2 59cc, 7.4 pushrods all done by a performance shop. Mine is pretty loud, has been since the install 2 years ago. Might try different oils. Mine seemed to get louder with the Royal Purple 10W-30. Mobile synthetic was quieter. Gonna try some different oil once I finish off this case I have.

**TACE02** · 02-28-2008, 07:21 PM

On a side note, what kind of numbers did you put down? And are you happy with the performance increase?

**chieftransam** · 02-29-2008, 03:24 AM

Mine will be due for an oil change soon, so I'll try something different.

The day I got the dyno tune I had the mt et street radials and stock exhaust still on

and it got 410 rwhp and 390 tq. When the e-cutout was open it was up around 422 rwhp and 399 tq.