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BMW 3-Series (E90 E92) Forum
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n54 intake manifold leak
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01-08-2024, 09:48 AM | #1 |
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n54 intake manifold leak
chasing a small boost and ft issue on 1 bank only, all 3 cylinders. is the intake somewhat known to crack or split at the seams?
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01-08-2024, 09:50 PM | #2 |
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All of the plastic components are subject to cracking and failing.
Oil vapor gets on them and they get brittle. charge pipe is a common culprit. |
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01-08-2024, 10:41 PM | #3 |
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Happens , usually at higher boost levels, upgrade it with a BMS or BMP one it’s metal and have port injection ports if you ever want to upgrade fueling
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01-08-2024, 10:42 PM | #4 |
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01-16-2024, 06:51 AM | #5 |
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Unless you're running big power or dropped it a few times in the garage the odds of the actual intake manifold cracking are slim. It's pretty robust plastic compared to other plastic junk in the engine bay. The o-ring seals could be leaking on the intake or CP. Everything has to aligned, tightened correctly, metal retaining clips seated, or you will leak.
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