compression on d16z6
11-May-2004, 11:35 AM
#1
Luka
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compression on d16z6
I'm looking at buying a d16z6 from a guy on the board. He did a compression test on it and said 150 135 135 150. Anyone know what the specs are for compression on this motor? Or if that compression is any good?
11-May-2004, 12:55 PM
#4
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These numbers are poor...and unfortunately I too was very interested in buying this motor.
My motor was tested for compression and the results were 180-183-180-160. After changing the spark plug in #4 cylinder, it was back up to 180. But I'm still burning oil.
My motor was tested for compression and the results were 180-183-180-160. After changing the spark plug in #4 cylinder, it was back up to 180. But I'm still burning oil.
11-May-2004, 01:10 PM
#5
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The seller said it ran strong and has taken good care of the motor. If the numbers are really this low, he would have to really push the motor for it to perform.
Is there any possibility that the test was done wrong? What conditions affect the results. Cold motor?
Is there any possibility that the test was done wrong? What conditions affect the results. Cold motor?
11-May-2004, 02:26 PM
#6
there are no conditions that affect the comp numbers... they should be hella higher. the throttle should be kept wide open, that's all.
as a matter of fact, I think the threshold level published in Haynes/Chilton is 130 psi. 130 psi basically designates a dead motor. it's junk... time for a .020 punch, new rings, bearings, general cleanup work, and a reworked head.
as a matter of fact, I think the threshold level published in Haynes/Chilton is 130 psi. 130 psi basically designates a dead motor. it's junk... time for a .020 punch, new rings, bearings, general cleanup work, and a reworked head.
11-May-2004, 02:29 PM
#7
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Originally posted by bbarbulo
there are no conditions that affect the comp numbers... they should be hella higher. the throttle should be kept wide open, that's all.
as a matter of fact, I think the threshold level published in Haynes/Chilton is 130 psi. 130 psi basically designates a dead motor. it's junk... time for a .020 punch, new rings, bearings, general cleanup work, and a reworked head.
there are no conditions that affect the comp numbers... they should be hella higher. the throttle should be kept wide open, that's all.
as a matter of fact, I think the threshold level published in Haynes/Chilton is 130 psi. 130 psi basically designates a dead motor. it's junk... time for a .020 punch, new rings, bearings, general cleanup work, and a reworked head.
11-May-2004, 02:36 PM
#9
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Originally posted by bbarbulo
well, you're gonna rebuild, no? so buying a junk motor is no biggie? I'm prolly gonna be getting a junk motor to play with.
well, you're gonna rebuild, no? so buying a junk motor is no biggie? I'm prolly gonna be getting a junk motor to play with.
11-May-2004, 03:43 PM
#11
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Originally posted by bbarbulo
well, you're gonna rebuild, no? so buying a junk motor is no biggie? I'm prolly gonna be getting a junk motor to play with.
well, you're gonna rebuild, no? so buying a junk motor is no biggie? I'm prolly gonna be getting a junk motor to play with.
i have a good z6 in pieces right now and junk z6 in my car :cry::cry:
11-May-2004, 07:51 PM
#13
Did another comp test...warm engine....WOT....which i didn't do last time. 180, 180 170, 160. So engine isn't pooched....still runs strong....was just interested in gettin some numbers so i could tell the buyer.
12-May-2004, 08:47 AM
#18
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Originally posted by 1niceSi
My motor was tested for compression and the results were 180-183-180-160. After changing the spark plug in #4 cylinder, it was back up to 180. But I'm still burning oil.
My motor was tested for compression and the results were 180-183-180-160. After changing the spark plug in #4 cylinder, it was back up to 180. But I'm still burning oil.
I can understand if the tester is not in there tight but to change a plug and have your tester read different #'s just isn't possible.
FYI - I just did a test on my Z6 last night just for comparisons sake.
185-180-190-195
I'm sure the numbers can be more consistent if I took my time but I did the whole test in less than 10 minutes.
that's some good numbers
