Aw Crap!

[geldartb]

Can anyone verify the GM P/N for me?

I came up with 12565118.. Ben is this something you have in the store? i didn't see them but i'd buy a set off of ya

thats the right number. i think i got mine from pace performance. i kept the baggie they came in with the part number

http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=135032

i think you can order them individually from pace. they come from GM in bags of 5

GM PART # 12565118
CATEGORY: Engine Valve Spring
PACK QTY: 5
CORE CHARGE: $0.00
GM LIST: $2.13
OUR PRICE: $1.27
this is the description from gm parts direct same part number

newgmparts.com has them too but they dont rape you on shipping

http://www.newgmparts.com/partlocator/index.cfm?action=searchCatalogOEM&siteid=213815

[PCGUY112887]

Dang, at least it isn't too bad.

I'm glad I used all stock stuff aside from the comp cams springs, which required nothing more than the springs themselves.

[Superdave]

Can anyone verify the GM P/N for me?

I came up with 12565118.. Ben is this something you have in the store? i didn't see them but i'd buy a set off of ya

[SappySE107]

The straight springs spin around a lot. The beehives still move around. Remember, that comp video was at 1 RPM point consistantly.

[19Cutlass94]

The spring is what is walking, not the valve. The spring spins around slowly with beehives, which doesn't hurt. Having a small shim that may or may not be under the spring however is not a good thing. Aluminum is soft and the spring would eat into the head if this happens.

I thought the beehive springs didnt move, that it was only the straight springs that moved around? I could be wrong though

[SappySE107]

The spring is what is walking, not the valve. The spring spins around slowly with beehives, which doesn't hurt. Having a small shim that may or may not be under the spring however is not a good thing. Aluminum is soft and the spring would eat into the head if this happens.

[IsaacHayes]

Back from Florida, from an 18hr drive.. whew! Catching up on a few threads before bed. Could there be any damage to the head form the valve walking around?

[ForcedFirebird]

and now we know, thanks dave

Yes, especially since I was just about to do the same on my heads!

[El_Diablo]

and now we know, thanks dave

[19Cutlass94]

You shouldnt have a problem with those shims.

[Superdave]

What made you come to that number? I thought GM rated the 660's bottom end to a 7200RPM max (or maybe that was just the rods?).

Tunerpro rounds the numbers a bit.. iirc i put in 7000 and it rounded up slightly.


Nobody knows how strong these rods are, i have a feeling that with my luck i'll be the first to find out.

Thanks Ben, the current shims are .015" and i'm pretty sure i've got plenty of clearance for another .030".

[SappySE107]

.045. I was going to ask you on your v6z24 thread if you had room for the LS1 seats:P

7k max on the rods (till the new PM rods..now I dunno).

[ForcedFirebird]

Rev limiter is @ 7009.26 RPM

Nice vid.. i have the one from Comp cams saved somewhere that shows how beehives are better than standards. I'll upload it to my putfile if i can find it.

What made you come to that number? I thought GM rated the 660's bottom end to a 7200RPM max (or maybe that was just the rods?).

[Superdave]

Rev limiter is @ 7009.26 RPM

Nice vid.. i have the one from Comp cams saved somewhere that shows how beehives are better than standards. I'll upload it to my putfile if i can find it.

[ForcedFirebird]

How many RPM's were you taking that motor to?

http://www.youtube.com/watch?v=i_NpzU4pGjc