comp 979 valve springs, are they internally dampened?

[22lbChevelle]

Or meant for external dampening? Or does it matter? Maybe I could pull the internals and use the factory external dampeners? 'Cause 4 out of the 12 I received have internal dampeners and the rest don't.

 

[getchasum]

Sounds like you got some 980's mixed in as well. Make sure that you use the stock cups with the 979's

 

[22lbChevelle]

Ok, can i remove the internal dampeners from the 980s and use them or do they have different spring rates?

 

[getchasum]

If it was me, I'd send them back. No way other them putting them on a spring gauge to tell for sure if they are 980's

 

[87LtdT]

979 and 980's are made from different steels and the heat treatments are different. Spring rates are of course different. 979's are not internally dampend...980's are.

I agree with sending the whole batch back...at the supplier's expense to get a shipment that you have confidence in.

Regards, Bob