dual valvespring problem

[Timmer1]

Hey guys, I'm mid way thru my cam swap and I just started to do the springs on my 2000 6.0L and took my stem seal off. On ls1howto.com, it shows to take a pen magnet to take the stock seat off and that isn't happening. I popped one of my new dual spring seats on the stock seat and it fits nice but the outside edges aren't down all the way against the head. Are the stock ones supposed to come off? Or am I supposed to just put the new seat on top of the old? I tried to gently pull up on the old seat and it isn't coming. Let me know what you think ASAP. Thanks. Tim

[RedHeartbeat]

Do you have cast iron or aluminum heads?

Can you post a photo?

[Timmer1]

I may be able to get a picture tomorrow morning, but they are cast iron heads. The stock spring didn't really sit on a seat. There was something that the spring sat around but not on. I've read that you have to use the hardware they provide when doing a dual spring swap, so I didn't just want to slap them on over top of whats there.

[RedHeartbeat]

Are the valve stem seals that you removed the same as the new ones that came in the kit? All the newer heads I've seen have the seat built into the spring seal and it all comes off as an assembly. The seals that come in the dual spring kits are just a seal and the washer that comes with the kit replaces the one piece seal. The new seals are 97-98 LS1 viton exhaust seals if I remember correctly.

[Timmer1]

the seals are blue but they look very similar. If the new spring seat is supposed to sit flush on the heads, something stock has to come off then.

[COWL327]

Is there a thin plate under the spring?

[Timmer1]

there is one that came with my kit, but under the stock spring there was nothing. The stock spring fits just over what I was thinking was a seat. If I don't get that off, the new seats don't sit flush to the heads.

[Timmer1]

pics of problem added

[RedHeartbeat]

Damn cast iron heads!

I've never messed with the iron heads before but that inner washer needs to come out somehow. Where the old stock spring sat is the same location the new dual springs need to sit flush and at the same height. Hopefully thats not a machined boss on the cast iron head that isn't present on an aluminum head.

[Timmer1]

if that is built in, can I just us the outer spring and leave out the inner if I had to?