I did a compression check on my b16 and 1,2,4 are well over 150 but cylinder 3 has 0. I poured some oil in it hoping to get some kind of compression, but still no compression. I also noticed 1,2,4 spark plugs are all black no deposits of anything just black. Spark plug 3 on the other hand is clear with a hint of fuel. Also there is no sign of oil and coolant mixing. Could it be I burnt the valves.

 

bent valve

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM JEFFREY &raquo;</TD></TR><TR><TD CLASS="quote">bent valve</TD></TR></TABLE>
How did i bend a valve, all i did was down shift from 5th to 4th, because of the uphill road. My friend did tell me that he could hear my motor blowing exhaust through the intake.

 

you need an air compressor to know

 

air compressor = leak down test.