bolts on flang are stuck...

[MrBuick (Magnum)]

Originally Posted by snakey5138999

If they're stock manifolds, the flange studs are just gonna snap.

Not always true. I have taken them off many times on my DCM Roadmaster. An impact does wonders, because it gives the studs a repeated shock, which helps break them loose. If you just stick a rachet on there, put a pipe on it, and crank down.. then ya, you are more likely to snap them.

I got all 6 studs out of the manifolds on my Gold Caprice, last year, as well. But both of these cars lived most of there lives in Florida. My Michigan based cars... I snapped 3 of 6 on the Red RMS, and have not even bothered spliting them on my other Michigan cars. I normally take the manifolds & cats as an assemble out the bottom. On the red Buick, I had soaked them with PB blaster for a week, and drove the car around for about an hour before I tried taking them off. Still snapped 3 of 6 with the impact starting on a light setting.

[snakey5138999]

Ahhhh yea. OP is a cali guy, so he might have luck with PB and an impact.

Im in NY, so like you said its useless for me too lol.

[BABYBLUE9C1]

Originally Posted by snakey5138999

If they're stock manifolds, the flange studs are just gonna snap.

I hope you need to just take them off because your putting headers on...

naw pulling the heads, but headers may go on aswell

Originally Posted by snakey5138999

Ahhhh yea. OP is a cali guy, so he might have luck with PB and an impact.

Im in NY, so like you said its useless for me too lol.

sprayed PB on the bolts but not able to work on it til the weekend, so hopefully it will either be ready to come off or we have the right tools for the job, thanks guys

[94goldprice]

My car has spent all its life in the Midwest rust belt... But between me, a 1.5 foot quality extension, and like a 4-5 foot breaker bar. My brother was moving the breaker bar while I was keeping everything straight against the nuts. We slathered liquid wrench and being persistent got all the bolts off the manifold without snapping any. I had stainless steel hardware to replace all the nuts and bolts that were being undone so I would recommend doing that.

Having the car on ramps and chocked helped it be that much easier to get in the right angles. You can also screw in brand new o2 sensors once the cats are bolted up. I didn't want to risk hitting them.