SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: The Chaz on January 27, 2008, 06:08:02 PM

Title: Piston identification
Post by: The Chaz on January 27, 2008, 06:08:02 PM: I need to know what kind of pistons I have, to sell them. They are out of an Olds 455 and have the numbers 1630 then under that is o2. I assume that means that the engine is bored .020, but the best I could come up with for the pistons was http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_910825_-1 (http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_910825_-1)
Is that correct, or does anyone have any ideas?
Title: Re: Piston identification
Post by: 2savage4you on January 27, 2008, 06:11:42 PM: pics of the pistons might help, and its usually stamped in the center (face) of the piston if its oversized
Well now that i looked not all are in the center ???
2sav
Title: Re: Piston identification
Post by: The Chaz on January 27, 2008, 07:03:20 PM: OK it says 040 in the center of the dish
Title: Re: Piston identification
Post by: The Chaz on January 27, 2008, 07:12:59 PM: here are a couple pics
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fimg156.imageshack.us%2Fimg156%2F6653%2Foldsparts006pp6.jpg&hash=8f2d6fc27b8ea3d774ac4de12376ea899052d2ec) (http://imageshack.us)
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fimg179.imageshack.us%2Fimg179%2F5187%2Foldsparts007nk9.jpg&hash=7ceded72ef39261c006475aa0eb470c7bfb6fcaf) (http://imageshack.us)
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fimg179.imageshack.us%2Fimg179%2F6948%2Foldsparts008vi2.jpg&hash=b525461b07c3614350a5ade7c9fc8b6685337974) (http://imageshack.us)
Title: Re: Piston identification
Post by: jet boat performance on January 27, 2008, 07:40:59 PM: Can't see quite enough but they look like Cast 8.25 to 1 (deep dish) .040 over ,another shot of the pin boss(inside the lower end ) would help Tom
Title: Re: Piston identification
Post by: The Chaz on January 27, 2008, 07:52:44 PM: better?
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fimg128.imageshack.us%2Fimg128%2F6513%2Foldsparts009vs3.jpg&hash=d9778e14d1452d9d387f33c32a7ffa5ae1d4f88a) (http://imageshack.us)
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fimg143.imageshack.us%2Fimg143%2F722%2Foldsparts010sa6.jpg&hash=c203d9bff88a221b1d152848c78fff241306796b) (http://imageshack.us)
Title: Re: Piston identification
Post by: hotrod56cars on January 27, 2008, 09:28:59 PM: A shot just a little bit further away so that the back of the piston comes out real clear. Those pistons have the same dish that the pistons have in the engine that I am selling on eBay and elsewhere.