i noticed a noise to day while driving that ive never hered before.it does it at about 1800-2000 rpm with a slight load,just normall driving.its a rattle thats constant while on the go pedle but when i let off it seems to go away get back on it it comes back.it sounds like a slight constant spark knock.anybody have any idea of what this could be?cus i dont..thanks

 

You don't have gauges, do you?

 

no idont have guages..

 

i think im going to pull the valve covers tommoro,and see whats going on and torque every thing down.does any body have the torque specs for the goodies under the cover.and what are the chances that the valve covers seals are going to hold up and seal when i go to put it back together..

 

Turbo surging?

 

nope not that..it sounds like some thing loose,like to washers on a bolt rattleing or spark knock in a gas motor..

 

Exhaust donut seals?

 

my up pipes are leaking,but im not shure if that will cause the noise im hereing

 

just got done doing tests..every thing checked out good.i did cylinder contribuation,injector buzz test and koer test.every thing is fine.i wonder if it my up pipes making the noise??

 

I mentioned that because on my truck I was getting a loud ticking noise that I was hearing from the cab. I replaced the driver's side donut seal without taking the transmission out and now it is much quieter in the cab but now I'm hearing a ticking noise that sounds like it's coming from the transmission but it's not. It's the other donut seal leaking. It's not leaking as bad but it's leaking and I'm in the process of figuring out if I can get the place I bought it from to assist me in removing the transmission to replace the donut so that I might have all my boost that I'm supposed to have and a nice quiet cab.
I would I could record the noise but I don't have anything that is that sensitive to noise to record all the noises I hear. Might I add they are not in my head, I have quite sensitive hearing and as a child could hear dog whistles. Not so much anymore, but you get the idea.