What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Rocket Man]

Thought I would do an oil change; drove it less than 150 miles since I bought it about 18 months ago.

Some a-hole replaced my oil with chocolate milk!

Oh well, probably a cracked head. Fingers crossed that it is just the gasket(s).

You can check for a cracked head fairly easy by pulling the valve covers and looking for clean places where coolant is washing away the oil. There’s a few YouTube videos.

 

[JollyRoger01]

Still have to hood and lift gate to do, but finished the sides today FINALLY *added a before pic*

 

[Rocket Man]

Still have to hood and lift gate to do, but finished the sides today FINALLY

View attachment 245561 View attachment 245562

Nice. You need to come over and do mine when you’re done.

 

[Sam Harris]

Thought I would do an oil change; drove it less than 150 miles since I bought it about 18 months ago.

Some a-hole replaced my oil with chocolate milk!

Oh well, probably a cracked head. Fingers crossed that it is just the gasket(s).

Crap

 

[Sam Harris]

Nice. You need to come over and do mine when you’re done.

X2!

 

[JollyRoger01]

Nice. You need to come over and do mine when you’re done.

Let's do it lol, I hear flights are cheap right now. I will definitely be purchasing a DA buffer after this... My shoulders hurt

 

[ks03]

Thought I would do an oil change; drove it less than 150 miles since I bought it about 18 months ago.

Some a-hole replaced my oil with chocolate milk!

Oh well, probably a cracked head. Fingers crossed that it is just the gasket(s).

kept outside? I don’t know how much condensation could accumulate in 18 months, but I thought condensation was a leading reason to change oil every 6months regardless of mileage

 

[NoReverseYukon]

kept outside? I don’t know how much condensation could accumulate in 18 months, but I thought condensation was a leading reason to change oil every 6months regardless of mileage

I really hope it is something as inconsequential as this. Even though I have 331,000 miles on it, there is no lifter noise at startup. I would think if the pushrod passages and lifters were gunked up with the sludge of a coolant and oil mix, there would be some telltale noise.
Either way, I will pull the valve covers tomorrow and see what's what.

 

[Rocket Man]

I really hope it is something as inconsequential as this. Even though I have 331,000 miles on it, there is no lifter noise at startup. I would think if the pushrod passages and lifters were gunked up with the sludge of a coolant and oil mix, there would be some telltale noise.
Either way, I will pull the valve covers tomorrow and see what's what.

Hoping for the best Matt. Keep us posted.

 

[05Single]

Still have to hood and lift gate to do, but finished the sides today FINALLY

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Nice work, these trucks are beasts to detail.
Sounds crazy but it’s good to throw wax/polish on the trim around the windows instead of taping off. Gives them a semi gloss look and prevents cracking and fading. Obviously the rubber can still be taped off.

 

[JollyRoger01]

Nice work, these trucks are beasts to detail.
Sounds crazy but it’s good to throw wax/polish on the trim around the windows instead of taping off. Gives them a semi gloss look and prevents cracking and fading. Obviously the rubber can still be taped off.

Thanks for the advice. I will definitely keep that in mind. My previous experience with the Meguires ultimate compound is what made me tape them up. I used the ultimate compound and polish then finished with black wax. Has anyone used the ceramic stuff yet?

 

[NCTyphoonKid]

Changed out the rear doors and took the molding and emblems off will probably buff it today

 

[Danny3737]

It’s Columbian particle board

I had to go back and look myself. He did say it was a "Coffee" table. Hmmm.....

I had to go back and look myself. He did say it was a "Coffee" table. Hmmm.....[/

 

[dubyagee01]

It’s Columbian particle board

Should be white then. With a street value of 350000

 

[Bombsquad85]

It’s Columbian particle board

Should be white then. With a street value of 350000

Loll I'm gonna tell people it's a columbian coffee table haha

 

[iamdub]

It’s Columbian particle board

Loll I'm gonna tell people it's a columbian coffee table haha

*Colombian. Don't disrespect the trade.

*sniff sniiiiiiiiiiiiiiiif*

 

[JollyRoger01]

Playing with some plasti dip type stuff. Not sure about the product but I do like the color combo.

 

[NoReverseYukon]

Well, this is what I found:
passenger side cover and head -

Much better than I was expecting. And I do have the 862 casting.
Is that emblem (2nd image) the Castech symbol? I can't see the symbol on the head.

 

[NoReverseYukon]

And the driver's side -

Compared to the passenger side head, this looks to have more build-up.
Should the passenger side be oil-stained?

Now either I caught this soon after the problem started or something else is going on. The oil didn't look too bad in the drain pan -

At least it didn't have any chunk or globs in it.

I think I will just give the covers a good cleaning, finish the oil change and drive it for a few miles and recheck.

 

[iamdub]

I agree with your proposed plan of action. That doesn't look quite like coolant in the oil. Maybe a little extra water from condensation given the amount of sitting time?