As the thread suggests, can you use 2011 Eagle 5.7 Hemi valve springs in an 04 Hemi?

 

No telling, but if I had to change them, I'd use the 6.1's.


SJ03

 

Not unless you have eagle heads. The valves themselves are longer. Don't use 6.1 exh springs/pushrods unless you are changing cam as well, as aftermarket cams are based on the 6.1 cam base circle, which is different than the stock 5.7.

 

Now it gets confusing...


All I hear are people saying use the 6.1 exhaust springs and push rods or at the very least the 6.1 springs even with the stock 5.7 cam.


I plan on keeping the stock cam because I like the way the motor is stock and I don't want to lose any gas mileage as I'm getting 18 highway and 13/14 in the city, with that said I'm still worried about spring breakage, my springs appear to be fine, but the tales of many who have broke springs scare the crap out of me.


Last night I bought a very nice set of 2011 eagle Hemi heads for $150, they were rebuilt/checked at the shop and the guy abandoned the project as he bought a whole new motor for his truck. My hope was to swap my truck springs with those of the eagle heads and use them in my 04 Hemi as money is super tight for me at the moment and I'm already spending a mint on lifters, head bolts and head gaskets. I don't want to use the eagle heads on my truck as I've got a plan to build a 550hp 6.1 Hemi with them eventually for a car.


What are some good quality 03-08 5.7 Hemi springs to use?

 

Newer (05+) springs will do just fine for all stock. Just buy new ones, not used ones.