LT1 LT Header install
I always no matter what car, smack the manifold bolts with some pb blaster and let it soak. When I put them on my old LT1 I removed the motor mount bolts one at a time and took a jack and twisted the motor. went in like a glove, I also throw some locktite on my new header bolts. After the car gets hot then cools check the bolts again.
All kinds of write ups on this very subject. If they are coated I would suggest getting a couple of self-wrapping bandages to wrap around the primaries when installing. Will keep the finish from getting banged up.
Definitely get the bolts like hellteeone is talking about, just got a set for my car after messing with an assortment of bolts for the last couple of years since I've had my LTs that were a pain to get on and off. The 12pt. 5/16ths bolts are SOO much easier.
haha i remember loosening my k member ever so slightly, since i couldn't get the second cat off the manifold. All the bolts off my neighbor pulled from underneath and i hammered the crap out of it. Also removing the steering shaft makes things so much easier!
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Staging Lane
Joined: May 2013
Posts: 81
Likes: 0
From: Chicagoland
I would recommend 6 point bolts, with a 6 point if you are unable to get a box wrench on it at least you can use a open end wrench. When using 12 point bolts you can only use a box wrench.
ARP makes some nice stainless bolts, look at p/n 400-1111
ARP makes some nice stainless bolts, look at p/n 400-1111
Staging Lane
Joined: Aug 2011
Posts: 96
Likes: 0
From: rapid city, sd
When I did mine, the alternator had to come out to go through the top, the oil pressure sensor had to come out, and I loosened the motor mounts to rock the engine a bit. It wasnt incredibly hard but just took forever. The hardest part was screwing the oil pressure sensor back in, took over an hour. It was acting like the threads were stripped no matter how much I kept cleaning them up.
Staging Lane
Joined: Aug 2011
Posts: 96
Likes: 0
From: rapid city, sd
+1, get the front end as high off the ground as possible. I had to use a couple blocks of wood on the jack to lift it up to the jacks stands.
Staging Lane
Joined: May 2013
Posts: 81
Likes: 0
From: Chicagoland
I don't know about your headers but I have at least one bolt on each side that is obstructed by the primary tube.
Choosing the right fastener to use is like choosing the right tool to make your life easier. 6 point vs 12 point it's not a big deal.
Choosing the right fastener to use is like choosing the right tool to make your life easier. 6 point vs 12 point it's not a big deal.
