Oil Expander Ends - Positon/Phasing on Piston Important?

CraigG · 08-13-2011, 12:44 AM

Hey Everybody,

I think that I positioned the ends of the oil expander over the pistion pin instead of the skirt.

Does it matter?

I think I had better STOP working in the garage late at night!

Thanks Again,
Craig

Alan Roehrich · 08-13-2011, 04:29 AM

If you look at it like a clock, and the exhaust side skirt is 6 o'clock, that's where I like my expander gap, the two rails I like at 2 and 10. Yes, I think it is important. If I think I missed location on one, I'll take it back out every time.

richie 2 · 08-14-2011, 06:42 AM

may i ask why alan?

Ed Wright · 08-14-2011, 08:22 AM

I've been putting the expander end gap over the pin for close to 50 years with no issues.

race watcher · 08-14-2011, 08:42 AM

Upon disassembly have you inspected if rings or rails have rotated?

Ed Wright · 08-14-2011, 11:17 AM

Quote:

Originally Posted by race watcher

Upon disassembly have you inspected if rings or rails have rotated?

They always move anyway. I always say the best way to insure the top two end gaps don't line up is to install them that way. (lined up)
They never stay where you put them anyway.

08-13-2011, 12:44 AM	#1
CraigG Junior Member Join Date: May 2007 Location: Iowa Posts: 37 Likes: 0 Liked 8 Times in 7 Posts	Oil Expander Ends - Positon/Phasing on Piston Important? Hey Everybody, I think that I positioned the ends of the oil expander over the pistion pin instead of the skirt. Does it matter? I think I had better STOP working in the garage late at night! Thanks Again, Craig

08-13-2011, 04:29 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,098 Likes: 1,546 Liked 1,777 Times in 404 Posts	Re: Oil Expander Ends - Positon/Phasing on Piston Important? If you look at it like a clock, and the exhaust side skirt is 6 o'clock, that's where I like my expander gap, the two rails I like at 2 and 10. Yes, I think it is important. If I think I missed location on one, I'll take it back out every time. __________________ Alan Roehrich 212A G/S

08-14-2011, 06:42 AM	#3
richie 2 Senior Member Join Date: Feb 2009 Posts: 967 Likes: 419 Liked 200 Times in 91 Posts	Re: Oil Expander Ends - Positon/Phasing on Piston Important? may i ask why alan?

08-14-2011, 08:22 AM	#4
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Oil Expander Ends - Positon/Phasing on Piston Important? I've been putting the expander end gap over the pin for close to 50 years with no issues. __________________ Ed Wright 4156 SS/JA

08-14-2011, 08:42 AM	#5
race watcher Junior Member Join Date: Nov 2006 Posts: 50 Likes: 5 Liked 1 Time in 1 Post	Re: Oil Expander Ends - Positon/Phasing on Piston Important? Upon disassembly have you inspected if rings or rails have rotated?

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