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01-10-2012, 01:36 AM
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#1 |
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Registered User
Join Date: Dec 2011
Location: Peshastin, WA
Posts: 14
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350 Heads
My '76 350 smokes a bit and the P/O said the valve seats were bad. So I bought a set of regrinds from a Camaro 350. But they have the double valve springs. (one inside the other) Is this a bad thing? What can I expect with this setup? Is there anything I have to do to accomadate the extra tension on my valves?
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01-10-2012, 02:20 AM
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#2 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: 350 Heads
Did you check the compression on each cylinder? Worn rings could cause smoking too.
Do you know the chamber size of the head? What size are the valves? Check the springs are not for a solid lifter cam. |
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01-10-2012, 03:05 AM
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#3 |
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Registered User
Join Date: Dec 2011
Location: Peshastin, WA
Posts: 14
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Re: 350 Heads
Cylinder compression good. About 4psi variance between all 8. As far as I can tell from the exterior of the heads on the engine now it's the same heads just shaved .008 more than the original. I suppose I will find out when we pull them for replacement.
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01-10-2012, 10:59 AM
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#4 |
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Registered User
Join Date: Mar 2009
Location: TN
Posts: 410
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Re: 350 Heads
I would suspect the valve guides/seals before I worried about it being a ring issue. The double springs may put too much pressure on your cam lobes, not sure which ones they are or their rating.
__________________
'69 Dodge Charger R/T 440, 727, 3.55 Sure Grip '68 Plymouth Road Runner 383, 727, 3.23 Sure Grip '89 Dodge Diplomat ex cop car 408, 727, 3.55 Sure Grip '77 Dodge Monaco ex cop car 440, 727, 2.71 '79 Dodge 'Lil Red Express pickup 360, 727, 3.55 Sure Grip '12 Dodge Challenger SRT8 392, M6, 3.92 '85 Chevrolet C-10 SWB 2wd 305, TH350, 2.73 |
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01-10-2012, 03:02 PM
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#5 |
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Classic Chevy Recycler
Join Date: Dec 2007
Location: Alabama
Posts: 422
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Re: 350 Heads
My 87 smoked pretty bad when I got it, so I replaced the valve seals. As far as I can tell it doesn't smoke any more.
__________________
 2004 Chevrolet Trailblazer EXT 1970 Chevrolet C50 1979 Chevrolet C30 Need another 67 or 68 soon... Last edited by jablack; 01-10-2012 at 03:03 PM. Reason: Forgot something. |
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