What is usually the difference in compression numbers between cold and warm compression tests?

If the cold compression test shows an even number, would the warm compression test show the same result but with higher numbers?

 

they say to do a compression test when hot, because as you know when hot metals expand and will give a nice ring seal.
But i did a compression test when cold and hot and made no difference, but i dunno...


Modified by mmuller at 11:25 PM 7/14/2004

 

thanks...anyone else?

just wondering...because my cold compression test yeilded 265-270psi per cylinder....

 

as longs as the cylinders don't vary to much.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93H22ACX &raquo;</TD></TR><TR><TD CLASS="quote">thanks...anyone else?

just wondering...because my cold compression test yeilded 265-270psi per cylinder....</TD></TR></TABLE>

woah thats good

 

why don't you try it and tell us what you find?

 

yeah do both

 

as tated before iw ould think you wobetter results (higher numbers) from a how compression test becuase of the metal rings expanding and sealing jus that lil much more.

 

so will the sleeves n everything else.

 

the oil pump is being installed thats why i havent had the time....i'll let you know