[mdelgado]

Hey guys, my comp cam kit came with new springs and I wasn't sure what to do with the metal collars/sleeves around the stock springs? Do I need to reinstall these sleeves over the new springs?

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[OLDED]

Dump them and run the bare springs and retainers, but you may need to shim the new ones to get the ideal rate for your cam setup..

 

[mdelgado]

Thanks!
Any idea what purpose they serve?

 

[jeff swisher]

GM does stuff like that on sbc and bbc and the only reason is to keep excessive oil away from the valve guide.
To keep oil consumption down...
Most use a good valve guide seal to do the same thing ..
I like my valve springs to see more oil flow on them to keep them running slightly cooler.

 

[mdelgado]

That makes sense, thanks Jeff