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#1
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3 ring pistons?
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Three rings? I guess I was expecting three plus the oil ring. This look right? Sent from my iPhone using Tapatalk |
#2
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Re: 3 ring pistons?
Yes, later 305E's used 3 ring pistons. Most V-6's have 4 rings (3 compression, 1 oil ring set).
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#3
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Re: 3 ring pistons?
That's a Real set of rings to. haha
__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#4
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Re: 3 ring pistons?
I think that pertains to the 351E, some early versions came with 4 piston rings and later switched to the 3 ring. After 1969 when the 305E was discontinued in light duty trucks, GMC replacement pistons for the 305E were superseded to 4 ring pistons for standardization purposes. I'm sure they did the same for the 351E as well. Piston sets that I bought for both 305 and 351 engines have all been 4 ring type.
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#5
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Re: 3 ring pistons?
FWIW, the original pistons (and the replacements) in my '67 351E were 4 ring. I'll have to look around, I seem to remember a service bulletin that said something about a production change to 3 ring pistons in some V-6's. Thought it was 305's.
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#6
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Re: 3 ring pistons?
My 66 305E had original 3 ring pistons and the replacements were 4 ringers. Dave
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#7
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Re: 3 ring pistons?
The book 'GMC Light Trucks' says the 305E had 3 ring pistons when it came out in 1963.
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#8
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Re: 3 ring pistons?
I am thinking the 3 ring pistons were one of the modifications to increase fuel economy of the 305. Lot less drag than the 4 ring piston.
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#9
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Re: 3 ring pistons?
While we are on this subject, what do the bigger V6s have for rings and are the magnums the same as non magnums? Thanks,Dave
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#10
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Re: 3 ring pistons?
From what I know the bigger v6's were 4 rings and no difference between Magnums and Non-Magnums. Magnums were bigger ports, valves, carb, and manifolds.
__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
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