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#1
02-11-2006, 03:54 PM
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compression test results!
alright I did a compression test on my 91civic dx to find out why I am loosing so much oil and here are the results
(cyl #1: 163)(cyl #2: 155)(cyl #3: 157)(cyl#4: 152), now I look up the specs and I think I should have a compression of 175-185(?) so this means on all cylinders there is some sort of a problem, but this doesnt seem bad enough to cause the loss of a qrt of oil per 400-500miles, does it? I must add I did this test after I did a valve lash adjustment so I dont know how that could effect this! let me know what you guys think... thanks in advance 
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#2
02-11-2006, 04:07 PM
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Re: compression test results!
could be a few of things, piston rings are not sealing properly or valve seats.
try this, put a spoonful of oil in the cylinder and re-test it. if the result is higher your piston rings are not sealing properly, if result is similar, the valve seats are to blame.
__________________
2012 VW Golf 3 Door Automatic (Company Car)  2011 VW Golf Wagon 5 speed (Company Car) 2010 VW Jetta 2.5 Automatic (Company Car) 2009 VW City Jetta 5 Speed (Company Car) 2009 VW GLI 6 Speed (Company Car) 2008 VW Jetta 2.0T 6speed (Company Car) 1999.5 Audi A4 Quattro Sport 1.8t (Chipped 1.0 bar) Sold 1990 CRX Si (Built B17a) - Stripped and Crushed 1988 CRX Si -- Stolen 1990 Civic Cx -- Sold 1990 Civic Si -- Parted 1989 Civic dx -- Sold
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#3
02-11-2006, 07:58 PM
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Re: compression test results!
time to do the leakdown.
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99 [email protected] psi si- I voted for the Terminator for Gov. 95 HB- B16a2- SC34@12psi WTB: USDM B16a2 or B16a3 complete short block. pm is the key. FS: B series InlinePro cast mani, PnH RC 550s, and Hondata S2b. pm me.
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#4
02-13-2006, 06:51 PM
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Re: compression test results!
135 should be about the minimum. Also, each cylinder is pretty close to the 10% margin. You dont have a perfect motor, or a bad motor. Just a little tired.
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#5
02-13-2006, 07:34 PM
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Re: compression test results!
I agree with Kris. I think the compression should be somewhere between 135-185. With yours still being where its at, I would just see it as a tired motor, nothing too serious. If it were lower than 135, yea, check the rings, then the valve seats, but I wouldn't worry about it yet.
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Tony 91 Civic Sedan DX - Stock 287k Miles
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