Which of the two is the better? Reason being, there was an upgrade on the interior, with knobs changing to buttons, which also usually means there are other "changes" too.
Which of the two is the better? Reason being, there was an upgrade on the interior, with knobs changing to buttons, which also usually means there are other "changes" too.
M40 will have a distributor cap on the front of the head, it's also a belt driven motor, M43 is a chain motor with a coil pack above the exhaust.
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As for which is better, I personally can't say, I got happy milage out of the E30 318i M40 and out of the e36 318i M43 motor
I think the M43 is the better motor. It has a flaw though in that it has a small plastic elbow right at the back of the head by the firewall which at high mileage starts to leak due to the head and plastic deteriorating at age and the leak is difficult to detect as owners do not know about this elbow. I would suggest you replace this as soon as you get the car for peace of mind. There is also a plastic y-piece under the inlet manifold which is difficult to get to but they do not seem to be such a big problem. I bought one with 300k on the odo and the leaking elbow soon started after that.
I think the M43 is the better motor. It has a flaw though in that it has a small plastic elbow right at the back of the head by the firewall which at high mileage starts to leak due to the head and plastic deteriorating at age and the leak is difficult to detect as owners do not know about this elbow. I would suggest you replace this as soon as you get the car for peace of mind. There is also a plastic y-piece under the inlet manifold which is difficult to get to but they do not seem to be such a big problem. I bought one with 300k on the odo and the leaking elbow soon started after that.