M42club.com - Home of the BMW E30/E36 318i/iS
DISCUSSION => Engine + Driveline => Topic started by: E30nate on April 16, 2008, 12:00:08 PM
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is there any difference in the bottom end of an E30 M42 and an E36 m42? i have heard that the E36 has cast internals from some people, and from others i have heard they are the same.
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the e36 has a cast crank
block is the same
oil pan is different
cylinderhead is the same
intake manifold is different
has a belt drive
timing chain an co are the same
please correct me if i am wrong..
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I was under the impression that the M42 bottom end of was the same and M44 had cast crank and a number of other changes.
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I was under the impression that the M42 bottom end of was the same and M44 had cast crank and a number of other changes.
i have heard both, i just want to clarify. i need an engine for my e30, but cant find one out of an e30 for my budjet, so i was wanting to know if an e36 is the same. i know it will work, but i dont want to downgrade the quality.
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engine management is different too..
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I have a M42 out of a 10/95 E36 318ti. I changed oil pans, intakes, and crank pulleys. I reused all of the accessories from the E30 because I had a good A/C, alternator, and PS pump and didn't want to replace anything just to use the serpentine belt drive. I also used E30 electronics. In other words, I stripped the E36 motor to a long block. The cast rather than forged crank would only be an issue if you were going to race and/or turbocharge the motor and even then failures are just as rare in the E36 four cylinders. I have no objective evidence but I think the E36 motor responds and performs a bit better with the E30 intake. Then again I had a pretty tired E30 motor.
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I have a M42 out of a 10/95 E36 318ti. I changed oil pans, intakes, and crank pulleys. I reused all of the accessories from the E30 because I had a good A/C, alternator, and PS pump and didn't want to replace anything just to use the serpentine belt drive. I also used E30 electronics. In other words, I stripped the E36 motor to a long block. The cast rather than forged crank would only be an issue if you were going to race and/or turbocharge the motor and even then failures are just as rare in the E36 four cylinders. I have no objective evidence but I think the E36 motor responds and performs a bit better with the E30 intake. Then again I had a pretty tired E30 motor.
thats what i figured. i eventually do want to supercharge it, but it probably wont be for a while down the road. so i might just drop in an e36 engine if i can find one.
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Correct me if I'm wrong, but it seems the original poster wants to know if the M44 lower internals are designed the same as the M42 - meaning are the pistons, rods, etc. forged or not? I too have seen some discrepancies posted on different BMW forums with regards to M42 vs M44 parts, so I can see his concern with wanting to replace his M42 with an M44 IF the M44 is an inferior design...
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i want to know the difference between the e30 m42 and the e36 m42. the non vanos e36 engine.
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the e36 has a cast crank
please correct me if i am wrong..
http://bmwfans.info/part-11211721817/
E30 and E36 M42 share the same forged crankshaft, part number is the same.
Later M44 in E36 had cast crankshaft.
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http://bmwfans.info/part-11211721817/
E30 and E36 M42 share the same forged crankshaft, part number is the same.
Later M44 in E36 had cast crankshaft.
that is the definate answer i was looking for. so would the e36 engine have to be from a 92-93, or will any obd1 engine be the same?
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nevermind, i looked it up on that link. they are the same up till 96 when they went to obd2. that is awesome.
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E36 head is slightly different with 6 mm valve steams instead of 7 mm in E30 M42. E36 also has single, but conical (progressive) valve springs and E30 has double normal springs. I've heared that the cams are also sliiiiiighty milder than E30 ones but it can't be much if so.
From a performance point of view the E36 head would be better with better flow because of the smaller valve steams and the valves also beeing lighter. Cams and springs would anyway be replaced in that case ;)
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The E36 1992 cams are unique in their part # (different from E30 and other E36). The 1992 E36 engine used 7mm valves.
Then in 1993 the E36 M42 got different cams again and also started using the 6mm valves.
I'm about to send an intake cam to be hard welded and am wondering whether I'd be better off sending my E30 cam or my 1992 E36 cam in. The E36 has slightly less wear, but if the E30 cam is warmer than the E36 cam....hmmmm
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i would probably use the head off my e30 anyway. i found an engine from a 95 for $200 with 90k miles, so i would have to use my head because of the vanos.
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No vanos on the M42 nor the M44.
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No vanos on the M42 nor the M44.
i thought that any bmw after 94 had vanos?
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i thought that any bmw after 94 had vanos?
None of the 4 cyl BMW engines had VANOS ever I think.
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None of the 4 cyl BMW engines had VANOS ever I think.
oh. well you learn something new everyday.
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so since the e36 doesnt have vanos, could i use the head from a 95 still, or would i have to use my stock one? and if i can use the head, will there be any gain from using the 91 cams in the 95 head?
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so since the e36 doesnt have vanos, could i use the head from a 95 still, or would i have to use my stock one? and if i can use the head, will there be any gain from using the 91 cams in the 95 head?
No problems using the -95 head.
Probably not noticeable which cams you'll use.
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No problems using the -95 head.
Probably not noticeable which cams you'll use.
ok. i probably wont bother changing them then. what about adjusting the cam gears. i know that advancing the intake side should give you a little bit of low end, but how much should i advance it if it do?
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I haven't tested enough cam settings on the M42 to give you a good answer but play around with it a bit and clock some acceleration times and test yourself, then let us know ;) :)
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I haven't tested enough cam settings on the M42 to give you a good answer but play around with it a bit and clock some acceleration times and test yourself, then let us know ;) :)
il probably do this. i need to find a cam degree wheel first though. il probably try harbor freight.