Exhaust bolt question

[nicholas]

Hi guys
I will be taking off my exhaust to install an aftermarket one. I have not played with exhaust in many years. I am installing an axle back exhaust.
My question is should I have the exhaust cold...warm..or hot to remove the bolts easier?

It's just two bolts to remove for the install.

Much appreciated
Stay safe
Thanks everyone.

 

[vw7674]

I pre-treat the fasteners with liquid wrench or 1/2 acetone 1/2 Dexron to start. I also use 1/2" ratchet/breaker bar & a pipe extension for leverage,
the first tug tells you if it's going to turn into a fight....... but a nice easy pull from a long bar helps gauge how easy or difficult it'll be. I find the more horizontal nuts & studs(the stuff before the converters) let go easier than the vertical stuff that runs the length of the chassis. But that might be my imagination talking. The last exhaust I worked was those down pipe crazy springs VW put on four cylinder golfs & jettas to about 1991.
At least those don't rust up. : )

 

[Gokhan]

Cold. Soak the rusty bolts in WD-40 overnight before removal.

Clean and then soak the bolts, nuts, and any female threads in fresh motor oil before installation.

 

[Astro14]

Soak them overnight. Cold.

Kroil is my favorite. Liquid wrench second.

WD-40 is lousy. PB’laster is worse.

 

[nicholas]

Thanks a lot

 

[mk378]

Have new bolts on hand, they are very likely to break when you try to unscrew them. Which is fine, you just want it apart.

 

[Astro14]

If it’s axle back, I would simply get new bolts and cut the old ones off with a die grinder. Faster. Simpler.

 

[nicholas]

Thanks.
It is an axleback