What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[iamdub]

Anyone have any experience with Cometic head gaskets?
I see they have a nice selection of different thicknesses with the mls type.

I'm running Cometics. Nice stuff. Summit had the thickness I wanted in stock.

 

[Just Fishing]

I'm running Cometics. Nice stuff. Summit had the thickness I wanted in stock.

Guy at the machine shop told me they were gtg as well.
did you just put on plain, or use some copper sealer spray?

 

[Just Fishing]

And i finally got the engine mounts off of the frame.
driver side was toast!

I had no idea, but it might explain the random clunk when taking off.

I also had no idea that they were captured bolts... lol

 

[Monz11]

And i finally got the engine mounts off of the frame.
driver side was toast!

I had no idea, but it might explain the random clunk when taking off.

I also had no idea that they were captured bolts... lol

Atomic has the best motor mounts

https://atomicfabandperformance.com/product/07-14-gmt900-poly-motor-mounts/

 

[Just Fishing]

Atomic has the best motor mounts

https://atomicfabandperformance.com/product/07-14-gmt900-poly-motor-mounts/

Ty, but i already bought a set of H2 mounts.

 

[Just Fishing]

Oh baby, those are some beefy units!

 

[Just Fishing]

Replace em and forget it.


$400

 

[Rocket Man]

And i finally got the engine mounts off of the frame.
driver side was toast!

I had no idea, but it might explain the random clunk when taking off.

I also had no idea that they were captured bolts... lol

Get the Hummer H2 solid rubber mounts, they never fail. Edit: nvm, I see you went with them already.

 

[pwtr02ss]

Guy at the machine shop told me they were gtg as well.
did you just put on plain, or use some copper sealer spray?

my brother did my engine. He dusted the copper spray on the gaskets because I had 200k mile short block. I don't think it's necessary but I don't think it hurts

 

[pwtr02ss]

View attachment 275986

Replace em and forget it.


$400

I did H3 mounts. Bolt on like stock. No complaints in the 30 miles I've used them

 

[Rocket Man]

I did H3 mounts. Bolt on like stock. No complaints in the 30 miles I've used them

I always get it confused, H2 or H3 mounts. I wonder what they used on my bagged and bodied Silvy since they had to lower the engine in the bay in order to get the hood to close. Might be something else entirely afaik.

 

[pwtr02ss]

I always get it confused, H2 or H3 mounts. I wonder what they used on my bagged and bodied Silvy since they had to lower the engine in the bay in order to get the hood to close. Might be something else entirely afaik.

honestly, mine could be h2. I can't remember

 

[iamdub]

Guy at the machine shop told me they were gtg as well.
did you just put on plain, or use some copper sealer spray?

Put on as-is. The heads were resurfaced since they were shaved a little for compression, the block deck was just scraped clean with a Razr and lightly buffed with a super fine Roloc disc. Same way I've always done and never a problem.

 

[Sam Harris]

Put on as-is. The heads were resurfaced since they were shaved a little for compression, the block deck was just scraped clean with a Razr and lightly buffed with a super fine Roloc disc. Same way I've always done and never a problem.

[emoji1787]

 

[Fless]

Put on as-is. The heads were resurfaced since they were shaved a little for compression, the block deck was just scraped clean with a Razr and lightly buffed with a super fine Roloc disc. Same way I've always done and never a problem.

Yer killin' me! LOL

 

[Bigkevschopshop]

Oh. Just did oil change on mine in driveway. Found sway bar end link destroyed so replaced both fronts. Next up will be power steering fluid replacement and brake fluid etc. then trans service. Going down my list. Still need to do that damn charcoal canister clean up.

 

[gooffeyguy]

I think it's H2 mounts, as the H2 had the 6.0l and 6.2l engines.

H3 came with like a 3.5l

Sent from my SM-G930V using Tapatalk

 

[Bill 1960]

I think it's H2 mounts, as the H2 had the 6.0l and 6.2l engines.

H3 came with like a 3.5l

Sent from my SM-G930V using Tapatalk

The H3 was also available with the 5.3. I don’t know what fits our trucks, though. Some day I’ll probably need to know...

 

[kbuskill]

I think it's H2 mounts, as the H2 had the 6.0l and 6.2l engines.

H3 came with like a 3.5l

Sent from my SM-G930V using Tapatalk

The H3 was also available with the 5.3. I don’t know what fits our trucks, though. Some day I’ll probably need to know...

Just to clear up confusion.

The mounts that fit our trucks are for the passenger side of the Hummer H3 Alpha, which came with the 5.3l. You will need two passenger side mounts to replace both mounts in our rigs.

And they work beautifully I might add.

 

[Just Fishing]

Put on as-is. The heads were resurfaced since they were shaved a little for compression, the block deck was just scraped clean with a Razr and lightly buffed with a super fine Roloc disc. Same way I've always done and never a problem.

I remember those, lol.
Bringing back more memories man.