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BMW 3-Series (E90 E92) Forum
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Used/Salvage N54 Motor Swaps - yay or nay
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01-28-2022, 09:14 AM | #46 | |
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used engine comp test
Quote:
Hi guys, I'm going to buy a used N52 ( or similar ) engine from the salvage yard. i checked out 4 engines all out of cars The sellers offered 6 months warranty also and they said removed from running cars. tried to crank it on the ground to check the compression test. i was wondering in all the 4 engines one or two cylinders had good 150 PSI or over but 4-5 cylinders 30-50PSI. i tried to change their Valvetronic position by hand, the result was the same compression. wondering if the problem is because no enough oil to support the Venus or it's for Valvetronic or its engine problem? i also tried some oil inside the cylinders, got a better result but still not sure venus/ Valvetronic are related to low compression on just some cylinders. Thanks. |
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