New to the bmw world and wondering can anyone tell me have I a m52tub25 or m54,was told engine is from a e46 need to get a loom and need to be sure first thanks in advance.
Last edited by Fquigley; 09-17-2017 at 10:03 AM.
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Both engines are Duel VANOS and look the same. If checking the engine stampings is too hard, then get the part number off the DISA valve. Run it through RealOEM and see which engine it is for. The M52TUB25 DISA is smaller than the M54B25 DISA.
1999 2.8L Z3 Roadster,
2000 3.0L Z3 Roadster,
There is only one thing more pleasurable than working on a Z3, that's driving it top down on a fine day.
mean anything to anyone?
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I Googled "25 6s 4" BMW. Everything I'm seeing indicates it's an M52, though it appears it could have come from either an E46 or an E39.
Tipsy
You have a M52TUB25 = M52 with technical upgrade, 2.5 L.
The M52TUB was the beta design for the M54 Engine with improved cooling water flow through the head/block and duel VANOS. This means that you can swap either a M52TUB or M54 engine in the same spot, wiring loom matches and ECU works. If you change the capacity of the engine (from 2.5 L to 3.0 L) then you need to tune the ECU to match the new engine.
1999 2.8L Z3 Roadster,
2000 3.0L Z3 Roadster,
There is only one thing more pleasurable than working on a Z3, that's driving it top down on a fine day.
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