compression test results
just wondering what I should be expecting on my compression test on my b16a
#1 155 #2 120 #3 150 #4 160 so I noticed #2 was a little bit lower.. I did the test with all spark plugs out..and 5 cranks with the dizzy unplugged.. so just wondering causes for this...mostly piston rings? and headgausket? valves? any tests I can do to narrow it down? thanks Chris |
did u make sure to unplug the fuel pump fuse? or what about holding the throttle wide open while cranking? is the battery charged?
also, u gotta have da car up to operating temps, after u get your initial numbers, squirt some oil into the combustion chamber and repeat the test, depending on your results you can then do a leak down test B16a compression pressure = 164.7 psi |
you don't need to unplug the fuel pump fuse, unplugging the dizzy will make the injectors not fire.
Those numbers are pretty low all around. I mean most b16s I've ever compression tested run around 180-210psi. Cylinder #2 is 30% lower than your highest cylinder (#4). Could be piston rings or the valves. Like mentioned above, a leakdown test can help narrow down the problem. |
The numbers are pretty low.
I would have the compression test done again, and I would have a leakdown test performed. Hope everything works out. |
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