Since I installed the E-fans I could notice it, but now with the headers it's getting even worse.

Is it just mine, or are ya'lls noisy too?

I would like to put some yella-terra's on, or some slp 1.85 rockers, but that's a chunk of change for rockers!

 

I've had my 2000 Yukon XL K2500 with the 6.0 L since new and it has always had a fair amount of valve train noise. However, when I went to a bigger cam it increased. If you look at the LQ9 engines on the Denali, Silverado SS and the Escalade, they all have an engine shroud with Fiberglas sound absorbing insulation on the underside. I'm sure that this is for sound damping as much as it is for looks. The Corvette engines have the same thing. I have just ordered the shroud pieces (L, R & C) for my truck for this very reason.

Also, with your electric fans, you do not have the fan noise to partially mask the valve train noise as you once did. This makes the noise stand out more. I would invest the money on a bigger cam tailored to your needs rather than rockers. The cost will be about the same and you will need stiffer springs either way. With a cam, you can control not only lift, but duration, lobe separation angle, and cam advance angle; all of which are important in improving performance. To go from the stock 1.7:1 lift versus 1.85:1 with roller tip rockers only increases the valve lift by about 9% (not very much). A relatively mild cam like my Comp Cams 54-412-11 with the 915 series springs with the 774 steel retainers has done wonders for about the same price (for parts) as 1.85:1 roller tip rockers with springs.

 

The rockers were to cure the valve train noise, not so much as for performance. The added lift of the rockers was an added bonus if you will. A cam is to come later on .. when I get the tranny and start on the blower project.

 

um i have rockers (jessel shaft mounted and mine is not quiet.

 

I thought I remember reading that some of the f-body guys did rockers and that made thiers quiet. Maybe it was springs too.

 

ok i have springs also. the little ticking is gone but when you have the hood open you can deff hear the valve train. with a stock cam or small cam it would prob be diffrent. so it might work for you not sure though.

 

lol .. I guess I'm jsut stuck with it then.

Is there anything stock about your valve train?

 

Got to looking at things and came up with this ...

http://152.122.48.12/prepos/files/Ar...00763-5774.pdf

I think this may be the problem. I've noticed too, the oil pressure doesn't seem as good as the black truck was.

 

I had the oil pan off of my '99 6.0 just two weeks ago to try to find the cure for a noisy valve train. Installed the new o-ring on the pickup tube and so far so good. Also put a set of rod bearings in and checked the mains. I think the noise in mine was definitely in the valves.

 

My 5.3 was a ticky motor.Now with the 6.0 it is quiet,i belive it is because i shaved the heads .020,and this is with a comp cam.