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| whats normal compression 3 cyl metro | |
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| Tweet Topic Started: Apr 26 2011, 06:03 PM (2,200 Views) | |
| ogoz23 | Apr 26 2011, 06:03 PM Post #1 |
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Elite Member
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Hi i have a 2000 geo metro with 150,000 miles , i did a compression test on all 3 cyl and all 3 cyl where between 150-153 is this normal ? |
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| Coche Blanco | Apr 26 2011, 06:05 PM Post #2 |
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Troll Certified
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It's low. But it should run fine. You'll want a rebuild for best mileage.
Edited by Coche Blanco, Apr 26 2011, 06:11 PM.
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| ogoz23 | Apr 26 2011, 06:33 PM Post #3 |
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Elite Member
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what MPG can i spect from this compression ? 5 speed 2 door |
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| Johnny Mullet | Apr 26 2011, 08:38 PM Post #4 |
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Fear the Mullet
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40+ even with those numbers. A cylinder normally don't start missfiring until it gets below 90. |
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| ogoz23 | Apr 26 2011, 08:41 PM Post #5 |
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Elite Member
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Johnny I sure wish you live in Miami lol mechanics here see my little engine like a UFO |
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| Coche Blanco | Apr 26 2011, 10:11 PM Post #6 |
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Troll Certified
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They should be happy to see it...it's super easy to work on. |
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| GeoRating | Apr 26 2011, 10:57 PM Post #7 |
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Aye, you would probably find you're more of a mechanic than you think if you opened her up and started poking it with a stick ![]() And yeah, I have to agree with Johnny on the MPG as I said in the other post I get 42-49 depending on how much I drive on the hilly road at 60mph on my way to work. The big difference with my engine is that it really has to work to get up those hills. I'll be testing my transmission ratio next week or the week after that but it runs like a 3.79, or a 4.10 with a dieing engine Morale of this story, your engine should run fine with those numbers. >.>
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| GeoRating | Apr 27 2011, 01:56 AM Post #8 |
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BTW to more appropriately answer the thread question, 170-210 is "normal" more like 185-210 is "our dream G10" |
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| Rooy | Apr 27 2011, 03:25 AM Post #9 |
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And as always, make sure you did the compression test with the throttle held wide open or your numbers could be low by about 30 psi or so. |
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| ogoz23 | Apr 27 2011, 08:02 AM Post #10 |
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Elite Member
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OK I did my compression test with the throttle held close and I got 150 I'm going to do it again with the throttle. Open hopefully it gets better ( cross my finger) |
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| Rooy | Apr 27 2011, 08:08 AM Post #11 |
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It's very common that people forget to do that. I guarantee your numbers will increase, roughly 30 psi, maybe more, which would point to your engine being perfectly healthy. |
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