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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old November 23rd, 2017, 11:21 PM
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Quigley Quigley is offline
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Default Valve Springs?

Thunder V12 has valve springs listed for sale. I assume these are for V12 engines which I think are non magnum. Would anybody know if they are the same as used on a 401 Magnum motor? Thanks in advance Dave
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Old December 5th, 2017, 02:38 AM
BobBray BobBray is offline
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Default Re: Valve Springs?

You got me, but I think there is a valve spring for engines that do not have valve rotators and one for engines that do. About the only V-6's that didn't have rotators were some light duty 305's in pickups. Did the seller give a part number?
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Old December 5th, 2017, 11:46 PM
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Quigley Quigley is offline
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Default Re: Valve Springs?

I don't know what the part number is on mine or theirs. l need to talk to them, but so far I have not been able to make contact.Maybe need to try a different avenue . Dave.
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