why do the stock pistons have a nipple
#1
why do the stock pistons have a nipple
I was just going through my chiltons manual and noticed the pictures of the stock pistons, and in the middle of the dish is a nipple with a small hole. I've seen this before with other stock pistons, but I'm not sure of its purpose, is it from the manufacturing process?
#2
Here's a pic of a blown motor with stock pistons (not mine). No nipple on them.
http://www.worldisround.com/photos/369/161.jpg
http://www.worldisround.com/photos/369/161.jpg
#6
Originally posted by madwolf
Here's a picture of the stock pistons.... no "nipples"...
Here's a picture of the stock pistons.... no "nipples"...
#7
I haven't torn down the engine yet, but in my chiltons manual it shows some photos with a nipple in the middle, I've seen them before on my Buick 455, as well as Olds 455, so they must be common. I see the pictures you guys posted do not look like the pictures in the chilton, so maybe they took them of the V6. At any rate I still can't figure out the pupose, I would thnk it would cause more bad than good since its a good spot for detontation to occur
#9
Originally posted by KillinFormula
mad wolf, what year is that LT1, because the antifreeze in it is regular, not dexcool, just wondering, sorry if it is off topic.
mad wolf, what year is that LT1, because the antifreeze in it is regular, not dexcool, just wondering, sorry if it is off topic.
madwolf's pic they are stock pistons [I don't see any antifreeze tho..
The 'nipple' might be from 'centrifugally cast' pistons, or from a casting sprue..
Many of us use regular antifreeze also...
#10
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Originally posted by shocktrp
Here's a pic of a blown motor with stock pistons (not mine). No nipple on them.
http://www.worldisround.com/photos/369/161.jpg
Here's a pic of a blown motor with stock pistons (not mine). No nipple on them.
http://www.worldisround.com/photos/369/161.jpg
Here's a picture of the stock pistons.... no "nipples"...
#12
Originally posted by Mtrhds94Z
shocktrp's pic has the antifreeze showing[ also they aren't stock pistons, either..]
madwolf's pic they are stock pistons [I don't see any antifreeze tho..
The 'nipple' might be from 'centrifugally cast' pistons, or from a casting sprue..
Many of us use regular antifreeze also...
shocktrp's pic has the antifreeze showing[ also they aren't stock pistons, either..]
madwolf's pic they are stock pistons [I don't see any antifreeze tho..
The 'nipple' might be from 'centrifugally cast' pistons, or from a casting sprue..
Many of us use regular antifreeze also...
Last edited by KillinFormula; 02-16-2003 at 03:51 PM.
#14
95's came with Dex-Cool, and it's not really "required" it's just that GM thought it to be a better deal since it supposedly lasts 5 years...
Anyone got P/N's or suggestions for replacement upgraded pistons for LT1's? Something you can use with stock setup or maybe a combo of all the stuff to change with pistons?
Anyone got P/N's or suggestions for replacement upgraded pistons for LT1's? Something you can use with stock setup or maybe a combo of all the stuff to change with pistons?