Intake Manifold Gaskets

[Kman]

Your cats rattling is probably your rear O2 sensors, not the cats making the noise. Pull the rear O2 sensors out and tap the cats. They probably won't make noise.

I replaced my rear O2's awhile back and the rattling went away.

 

[04SS99Denali]

what common intake manifold gasket problem? i never heard of this in the 5.3's. the OBS trucks had the intake gasket issue because coolant

 

[dwmmatt23]

I forgot the part # but if you search my threads one of the members posted the # for the nock sensors and an updated wiring harness for them. My biggest pita doing this was just popping off the gas lines.

Thanks Ill search that then head to the dealer, or do you think somewhere like rockauto would have the new updated ones? Also what tool is that to remove the lines needed?

 

[yukondoit]

Just get a fuel line disconnect tool. You can pick that up at your local auto parts store.. Less than $20

 

[dwmmatt23]

is the updated gaskets the green gaskets?

 

[bkboatnsleds]

No, and the new ones do NOT snap onto the intake like the original style,,, I think its a Felpro FPMS98016T

Look like this

 

[dwmmatt23]

No, and the new ones do NOT snap onto the intake like the original style,,, I think its a Felpro FPMS98016T

Look like this

Man I read the old ones were orange and the updated ones were green so I ordered them on amazon with the knock sensors and tool already

 

[bkboatnsleds]

That is true.. they did update to the green ones.. but they have updated again... to this totally different style. And once you get a set in your hands you'll see why. These are all metal housings, gaskets are way thicker.. just a 100% different / better design. I would not wast your time putting the "clip on / oem" style back on.. you'll be back at it doing it again sooner than later.

 

[yukondoit]

That is true.. they did update to the green ones.. but they have updated again... to this totally different style. And once you get a set in your hands you'll see why. These are all metal housings, gaskets are way thicker.. just a 100% different / better design. I would not wast your time putting the "clip on / oem" style back on.. you'll be back at it doing it again sooner than later.

I did not know they have another updated set out.. I ended up getting the greens a couple months ago. From what you described, they definately seem to be way better.. At least I know what to get if and when mine crap out again.

 

[dwmmatt23]

Well the greens are on the way with the knocks so im just going to use them, I plan on doin a 6.0 next year so when I swap it in ill use these newer updated ones. thanks for the info