how is compression check done
02-15-2009, 12:15 PM
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how is compression check done
I am selling my car and the buyer has a buddy who will do a compression check. How is this done? I want to make sure that I am getting legit results.
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02-15-2009, 01:43 PM
#5
you forgot a couple steps........
1) disable injectors (unplug injector harness) and pull the fuse on the fuel pump.
2) open throttle blade while cranking (i prefer to pull the intake manifold for this job. it makes getting quick access to the plugs a lot easier.)
02-15-2009, 02:05 PM
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Touching the throttle blade will take the throttle body out of calibration.
Hmmm good to know that you an do a compression check
with the plenum off that is one of the things I was wondering
since I'm about to do a few things and figured I would do a
compression check while in there
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02-15-2009, 05:27 PM
#9
Compression check won't tell you much. I did a compression check on my motor and it came up normal. Then I did a leakdown test on it and it showed high leakdown on 2 cylinders. Just do a leakdown check.
P.S. Don't listen to Quadcam about taking off the intake manifold to get to the plugs for a compression check. You can get to them just fine without taking it off and the pain in the *** that goes with it like stripping intake plenum threads, and a possible manifold leak. He looks for every opportunity to take off his intake manifold. Why?
Boredom is my guess 
I'm going to hear about this soon. Should be getting a phone call in 5 minutes! 
Get the leakdown done!
P.S. Don't listen to Quadcam about taking off the intake manifold to get to the plugs for a compression check. You can get to them just fine without taking it off and the pain in the *** that goes with it like stripping intake plenum threads, and a possible manifold leak. He looks for every opportunity to take off his intake manifold. Why?
Boredom is my guess I'm going to hear about this soon. Should be getting a phone call in 5 minutes! Get the leakdown done!
02-16-2009, 06:07 AM
#10
Compression check won't tell you much. I did a compression check on my motor and it came up normal. Then I did a leakdown test on it and it showed high leakdown on 2 cylinders. Just do a leakdown check.
P.S. Don't listen to Quadcam about taking off the intake manifold to get to the plugs for a compression check. You can get to them just fine without taking it off and the pain in the *** that goes with it like stripping intake plenum threads, and a possible manifold leak. He looks for every opportunity to take off his intake manifold. Why? Boredom is my guess I'm going to hear about this soon. Should be getting a phone call in 5 minutes!
Get the leakdown done!
P.S. Don't listen to Quadcam about taking off the intake manifold to get to the plugs for a compression check. You can get to them just fine without taking it off and the pain in the *** that goes with it like stripping intake plenum threads, and a possible manifold leak. He looks for every opportunity to take off his intake manifold. Why?
Boredom is my guess I'm going to hear about this soon. Should be getting a phone call in 5 minutes! Get the leakdown done!
WTF!!!!
some of us have never stripped a manifold bolt!!! 
that...and I love to use my torque wrench......I have to feel like I am getting my money's worth out of that damn Snap-On wrench!! seriously though.....I still prefer to pull the manifold. using power tools, the manifold is off in a very short amount of time.......plus, it gives you easy access to all the bolts and no chance of dropping one. the nissan gaskets are reusable, the buying gaskets is not an issue either.
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