Greetings all

v6 stock. i ordered new set of valve spring from fierostore, they don't look like the original. Shields inside is different. Does it matter? Just put new one in or pull shields from the old and new ones and reinstall old shields into new springs?

Help will be greatly appretiated.
Thank you

[This message has been edited by voron.308 (edited 02-05-2021).]

The shields probably won't fit inside the new springs, anyway. But it's not a big deal. You can leave them out.

Knowing that GM would not put in a part that it could leave off and save 2 cents/car, what are the shields supposed to do? There's filtered air flowing through the valve covers, oil vapor, exhaust gas ... presumably these protect the valve stem seals??

Those are dampers.

They expand outwards and create friction with the spring's coils as they rub up and down.

The idea is to damp unwanted oscillations/movements of the middle coils.

Here we can see the middle coils of a valve spring moving around:


The damper and spring are made to work with each other, so I would use the GM damper with the GM spring, and your aftermarket damper with your aftermarket spring.

quote Originally posted by pmbrunelle: Those are dampers ...

Thanks for explaining that and posting the cool video. It's quite amazing how much oscillation there is and I was especially interested to see how much the valve stem tip moves left-to-right as it gets to the top of its travel !!

I would argue modern springs don't have this issue... But wtf do i know.

Gentleman's - Thank you very, very match.

Great video. I watched the whole thing expecting to see a valve drop and disappear into the cylinder.....

Spoon

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"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut