Ta4life

had headers on for 150 miles with it running good and last 50 miles it was getting bad gas millage and made this noise 15 miles.

after a oil change / warm up it does not make it at idle anymore...

View Video on FQuick

lifter....or rod knock?

joeSS97

Sounds to me like an exhaust leak.That would explain the poor mileage too.

Ta4life

that was my guess first. but it sounds more solid than sucking air.
i think ill loosen the header bolts and reseat the gaskets to ensure myself

joeSS97

If you are going to do that you might as well pull the gaskets an look for signs of a leak. What gasket did you use?

Ta4life

it was the normal gasket material.. they came with my headers. was not steel ones like OEM.

joeSS97

Get a better quality gasket. Are they Kooks headers?

LeeCTS-V

Check the dipstick as well. I've had mine touch the header and make that noise as well.

-- Lee

95z28man

I can tell you that I had an exhaust leak and it sounded identical to that. I could of sworn it was something else because sometimes it really does sound like it's rods or rocker or something more serious, but it's just a leak. I would definately try that before you dig too deep.

LearJet

Sounds like one of your rocker arms came loose to me. My car sounded just like that when I bent a pushrod. I would pull the valve covers off and have a look. you could use a stethoscope too pinpoint the noise, if you don't have one just use a long screwdriver and hold the handle to your ear.

Ta4life

i pulled one valve cover last night and everything seems good in there. im taking headers off and reseating them to see if that is my problem.

Ta4life

still looks like something with motor. headers made no difference

95z28man

Definately a loose rocker or something up with a rod. Avoid running it too much until it's fixed.

maverickmk

check the trans - the inspection cover and the bolts on the converter/flex plate see if any of those are loose - just a thought

OH95Z28

I vote rocker too. u need to take the valve covers off while the car is running and see