Intake Manifold Gasket - What Else?

[ShookieJay]

Well, I finally got the dreaded P0300 now that the weather's gotten cold. It's been below freezing the past few days, and when starting cold, it runs rough and the MIL flashes until it gets warm. Looks like it's time for an intake manifold gasket.

I've read that when doing this job, the knock sensors/harness should be replaced as well. Is there anything else I should do while I'm in there? Also any tips would be greatly appreciated. Any special tools required? I'm sure this has already been very well covered on this forum before, so if anyone knows of a good thread, feel free to drop a link. Thanks!

Truck is an 03 Tahoe with the FlexFuel 5.3 btw

 

[afpj]

This talks specifically about the valley pan gasket but it's the same area...

Valley pan gasket replacement -- what else proactively?

2003 Yukon Denali XL 187,000 Planning to replace a leaking valley pan gasket soon. Been living with a small leak for a long time; but I'm finally tired of the drips... What other proactive repairs might you suggest while the thing's torn apart? I generally don't believe in fixing it if it...

www.tahoeyukonforum.com

 

[B-train]

The job is pretty straight forward. I think the only tool that is somewhat special is the fuel line release for the internal coupler. Other than that, just basic metric tools, some pliers, and a couple wrenches should get er done.

 

[Doubeleive]

Well, I finally got the dreaded P0300 now that the weather's gotten cold. It's been below freezing the past few days, and when starting cold, it runs rough and the MIL flashes until it gets warm. Looks like it's time for an intake manifold gasket.

I've read that when doing this job, the knock sensors/harness should be replaced as well. Is there anything else I should do while I'm in there? Also any tips would be greatly appreciated. Any special tools required? I'm sure this has already been very well covered on this forum before, so if anyone knows of a good thread, feel free to drop a link. Thanks!

Truck is an 03 Tahoe with the FlexFuel 5.3 btw

oil pressure sensor, with the intake off it is much easier to do you might still need the special socket to get it out though. not 100% sure
apparently a lot of people have a hard doing it I just bought the socket and had it out and new one back in nothing flat maybe 3 minutes?

 

[Doubeleive]

just hit the play button

 

[ShookieJay]

oil pressure sensor, with the intake off it is much easier to do you might still need the special socket to get it out though. not 100% sure
apparently a lot of people have a hard doing it I just bought the socket and had it out and new one back in nothing flat maybe 3 minutes?

Good to know, I'll add it to the list.

 

[ShookieJay]

just hit the play button

Says video unavailable

 

[Fless]

This is it. @Doubeleive @ShookieJay

 

[Doubeleive]

Well, I finally got the dreaded P0300 now that the weather's gotten cold. It's been below freezing the past few days, and when starting cold, it runs rough and the MIL flashes until it gets warm. Looks like it's time for an intake manifold gasket.

I've read that when doing this job, the knock sensors/harness should be replaced as well. Is there anything else I should do while I'm in there? Also any tips would be greatly appreciated. Any special tools required? I'm sure this has already been very well covered on this forum before, so if anyone knows of a good thread, feel free to drop a link. Thanks!

Truck is an 03 Tahoe with the FlexFuel 5.3 btw

I would highly recommend getting the the fel-pro metalized gasket set, can't go wrong with them perfect fit and function.

 

[Doubeleive]

Says video unavailable

linked below, but if you just hit the play button it takes you to youtube

 

[ShookieJay]

Any thoughts on the Dorman knock sensor harness? I'll be using ACDelco sensors but the GM harness is double the price of the Dorman...

 

[B-train]

I've learned the hard way that going cheap on electrical items doesn't pay if you plan to keep it. Pay for genuine GM and save yourself the headache. How much is saved if you get to do the job twice.....run for parts twice.......fight for warranty, etc.

 

[Doubeleive]

I think for the wire harness the dorman would be fine, the only reason the harness is recommended to be replaced is due to the contacts getting rusty over time and exposure to water like the sensors

 

[ShookieJay]

I've learned the hard way that going cheap on electrical items doesn't pay if you plan to keep it. Pay for genuine GM and save yourself the headache. How much is saved if you get to do the job twice.....run for parts twice.......fight for warranty, etc.

You've got a point. I definitely don't want to pull the manifold more than once if I can help it, which is why I'm doing the sensors now.