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| 2.3 16v compression test; Difference in pressure | |
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| Tweet Topic Started: Wed Aug 9, 2017 5:00 pm (155 Views) | |
| zidafz | Wed Aug 9, 2017 5:00 pm Post #1 |
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Newbie
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Dear All, I ran a compression test on my 2.3 16v engine and the figures are as follow (LBS per SQ IN): 1. 100 = 6.9 bar 2. 115 = 7.9 bar 3. 75 = 5.2 bar 4. 75 = 5.2 bar a thread here, says: "2.3-16 compression ratio 10.5:1, new value 14-16 bar, wear limit 12.5 approx." My car has power on high revs only, but unfortunately I cannot compare it to any other 2.3 16v. Is is possible that the figures are so low and the engine still running? Should I overhaul engine block and head? or overhauling the head could be the solution? I also checked a video, where they mention how to check if it is due to head or to cylinder gaskets, by topping thick oil in the cylinders, blow them off and do the compression test. If the pressure increases, means the cylinder gaskets are worn, if not, means that the issue is from the valves/cylinder head. Any experience or an idea? Thanks |
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| Will | Wed Aug 9, 2017 7:45 pm Post #2 |
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Highly Addicted
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Most likely the cylinder head, the exhaust valve guides tend to wear and you lose concentric seating on the valve seats, hence a lack of compression as they don't deal properly. A leakdown test will reveal all (find where the loss of compression is) - you would expect to see a leak into the exhaust. It's definitely possible for an engine to run with the symptoms you say, usually low down torque is affected but at higher RPMs there isn't as much opportunity for gases to escape hence they still rev fairly well. |
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3:15 PM Jul 11