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M54 to N52 Swap
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- Newbie
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- Joined: Thu Jun 30, 2022 12:46 am
M54 to N52 Swap
I just acquired a 2003 BMW Z4. 6 manual transmission. The M54B30 likely has a blown head gasket. How big of a hassle/project would it be to swap the M54 for an N52b30?
- Smartbear
- Lifer
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- Location: a barn in Somerset
M54 to N52 Swap
It would a be much harder job than replacing the head gasket, are you 100% it’s failed? It’s almost unheard of for the head gasket to fail on those engines. What tests have you done?
Rob
e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold
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- Senior Member
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M54 to N52 Swap
It's what an extra 30bhp for a lot of hassle. Would be better off supercharging and fixing the head gasket I would have thought.
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Online
- Lifer
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M54 to N52 Swap
If you are worried about a bit of mayonnaise under the filler cap, it’s common on the M54. It’s a symptom of a failed/clogged CCV (easy fix) rather than a blown head gasket.
As above, replacing the engine would be a significant challenge.
As above, replacing the engine would be a significant challenge.
2003 Maldives Blue 3.0i auto
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
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- Senior Member
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M54 to N52 Swap
Its easy... sell the earlier car, buy a car with a later engine. Job done
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- Newbie
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M54 to N52 Swap
I have 3 cylinders (2,3, & 4) with relatively low compression about a 150 PSI. And I have hydrocarbons in the coolant.
Sounds like a bad head gasket to me...other thoughts?
You'll have convinced me to just fix this engine.
Sounds like a bad head gasket to me...other thoughts?
You'll have convinced me to just fix this engine.