LLY: Up pipe switch out, what all is involved?

[ksstang]

I'm getting ready to do my EGR delete on my LLY, and curious what all is involved in changing out the up pipe? I got an extra up pipe that I've cut the EGR riser off and welded shut. Any tips or tricks that would make this job easier would be much appreciated!

Thanks!

 

[Awenta]

Don't break the bolts!

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[ksstang]

That's what I'm afraid of! The upper bolts look like they are next to impossible to get to!

 

[CaptPhil]

It is a tough job. Be prepared to break off a bolt or two.

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[DMAXchris]

Do it with the truck warm. Much less likely to break a bolt. You'll need a good 12mm 12 point 1/2" socket, a breaker or long wrench and a buddy to help. If you dont have a lift, remove the wheels and lower the truck down on blocks. Take out the fender liner and you shoild be able to see the up pipe. The bolts on the manifold arent too bad, but the pedestal bolts are tough. It works well if you have a friend to place the wrench on the bolts from below while you turn the wrench from above.

 

[RickDLance]

Lubricate days in advance and often.

 

[gmduramax]

Remove the down pipe and hit the bolts with a torch first. They come right out.

 

[andy-stevenson]

Build your transmission at the same time...

 

[CarolinaHD]

After removing the heat shields and downpipe, I removed the passenger fender liner and tire, and snuck a 18" breaker bar up there to break em loose. If it's really persistant, you could slide a cheater pipe over it.

 

[ksstang]

do the heat shields really need to go back on? I've heard lots of guys say they've left them off after doing a job like this. Just curious.

 

[malibu795]

do the heat shields really need to go back on? I've heard lots of guys say they've left them off after doing a job like this. Just curious.

I don't run the shields.. Then again I'm rarely above 1000°

 

[ksstang]

The only time I really get over 1000* is when I'm towing heavy.

 

[andy-stevenson]

I wouldn't worry about the heat shields.

 

[Hot COCOAL]

I had heat shields once upon a time...

 

[chevyburnout1]

Unbolt the passenger side body bolts and jack up the cab a bit. Lots more room!