we have a 1998.5 2500 that has a severe crack in the manifold. we have a new 3 piece manifold coming. But how can you get the bolts out of the head to take the exhaust manifold off. they seem REALLY tight. do you just pour WD-40 all over it or what. we dont want to break the bolts off in the head then we got a real mess. Any help will be appreciated.

Thanks
Cody

 

I have done a bunch of ATS manifolds. Never had a problem with the stock bolts breaking. With all the expansion and contraction I have been able to take some of the bolts out by hand.

A wobbly on a 13 mm (reaclling from memory) and an extension should do the trick.


Justin

 

every time i worked on older engines where manifold were rusted so bad you would be scared to try and turn the bolts or nuts i would run the hell out of it an get its as hot as it will go and the take them out. i never snaped a hot one but ive broke lots of cold ones. But when i did my ats i had other parts of the thruck so i just sprayed them all with good penetrating oil the day be for and couple times be for i started and they all came right out. just a PITA to get some of them. Good Luck

 

No problems on mine, thought a couple would break with all the force i was applying but stayed together.

 

I've replaced well over a dozen Cummins manifolds with ATS, never had one bolt break.

 

The bolts have a type of anti-sieze coating from the factory.
If you are really worried get some PB blaster from the hardware store.

 

Thanks for all your help. we got them out without any problem at all. too put them back on is there a special torque for them?

Cody