M50b25 non vanos in a z3

[bm0p700f]

Well my 2.8 single vanos 1997 engine blew a head gasket. Replaced that timed it properly and started it and catastrophe. The timing went out so the tensioner must have failed but there was oil starvation in the head that wrecked the cams and journels. There was no oil warning light so somehow channel in the head or block have got blocked.

Anyway engine coming out. Its toast probably so given these m52 sem like ticking time bombs (96k miles emgine and tjis is the second on thats let go on me soon after buying the car) im now thinking an early non vanos m50b25 and swap the engine loom and rebuild it with wither bottom end from my 2.8 or 3.0l bottom end.

While the engine will fit nicely are there any wiring issue I might face. My car is obd1 I think as there no obd2 port in the car. Its a 1997 z3.

I just want a simple car with a simple engine with an iron block.

This should work right.

 

[Ianmc]

Put a M44 engine in. Bullet proof if serviced regularly!

 

[bm0p700f]

Thats not helpful. Pretty sure if I started shooting at an m44 it would not be found to be built proof. M50s are relaible also.

My question relates to if I chnage the wiring harness to a non vanos loom would everything just plug in the non vanos engine or are there differences that need to be over come.

Also would a m50b25 single vanos engine be fine with my current engine loom for the m52b28 single.

Im intending to strip and rebuild it at least partially. Over buy an engine fit and hope for the best.

 

[bm0p700f]

Well got the engine now to start taking it part.

My plans. M52b28 crank and rods with b25 SV pistons giving 11:1 cr. M50 manifold cams probably maybe m54 intake and m50nv if i can find one and perhaps a set of tubular exhaust manifold there some on ebay with a freezer flowing exhaust.

Dont know what it will produce when done but hoping for north of 250hp.