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What should the compression of each cylinder be?
“Good” compression depends on the engine. Unfortunately, engines don’t come with their proper compression stamped on the outside. But a good rule of thumb says that each cylinder in a mechanically sound engine should have compression of 130 psi or higher.
What is a good compression pressure?
As a general rule a compression of 135 PSI or better is excellent. Similarly, a compression of 85 PSI or lower is extremely bad. The most desirable situation is that all cylinders, give the same or close to the same reading. Furthermore, that reading should be above 135 PSI.
Is 90 a low compression?
They shouldn’t vary more than 10% from highest to lowest. That all said, 90 psi is too low, even for a low compression engine.
Is 170 psi good compression?
You should start to worry if one of your cylinders is getting close to 100 psi. Most new engines in good condition compress at around 175 psi. If we look at the example above, we find that the #4 cylinder at 160 psi is O.K. But let’s compare it with the cylinder having the highest pressure level at 175 psi.
Can you do a compression test on a Nissan 3.0L?
The compression test will also let you know just how healthy (mechanically) the engine is on your Nissan 3.0L, 3.3L, 3.5L car, pick up, SUV or mini-van. This article will walk you thru’ the engine compression test and more importantly, I’ll show you how to interpret the results of your compression test.
What’s the lowest compression reading on an engine?
So then, 140 PSI is the lowest possible compression reading that any one of the rest of the engine cylinders can have. Any compression reading below this and that engine cylinder will misfire.
How much compression does a Nissan Quest have?
Let me give you another, but more specific, example: Let’s say that my 2002 Nissan 3.3L Frontier (or Nissan Quest, Pathfinder or whatever), produced the following compression readings: Cylinder #1 = 165 PSI Cylinder #2 = 85 PSI Cylinder #3 = 145 PSI