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7 Series - E38 (1995 - 2001)

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  #1  
Old 06-01-2010, 02:11 PM
Merciful1000 Merciful1000 is offline
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1996 740il engine/tranny replacement

Hi, I'm new to the forum and in need of some advice on replacing the motor and transmission on my 1996 740il. Unfortunately I wasn't able to find an answer by using the search. I was told by a few people that I might need to swap everything on my current engine over to the new one, because the ecu is coded to a specific engine and transmission.?? If that's the case. What important electronic items should I consider in order for this swap to work? Thanks.
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  #2  
Old 06-01-2010, 03:53 PM
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drivinfaster drivinfaster is offline
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engines do not care what year they are, as long as it is compatable with the chassis. most salvage yards have this information in hollander listings to indiate what year(s) and chassis are going to work.


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  #3  
Old 06-01-2010, 05:28 PM
Merciful1000 Merciful1000 is offline
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Ok thanks Drivinfaster. Is there any electrical components that I should be aware of that needs to be transfered over?
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  #4  
Old 06-01-2010, 09:39 PM
balance balance is offline
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Not sure if this is going to help but...

I would try to get a motor and tranny from the same year if I could. A 1996 will have a 5HP30 transmission which was only used in the E38 740 from 1995-early 1997 model years, and I understand that the ECU controls the shift points, so this could be a problem. A 1995 740 would be out of the question for me because it used a different block (M60), and newer M62 motors will have variable valve timing, water cooled alternators, secondary water pumps, and I think electric radiator fans, so the harnesses will be different.

As long as the block is the same, you could probably swap everything over but then you would still take a risk with the tranny. If it was me, I'd wait it out to find a motor and transmission from the same year, just to make it easier for me.
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  #5  
Old 06-01-2010, 09:52 PM
balance balance is offline
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Also, I'm curious how the engine and transmission both went out at the same time?
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  #6  
Old 06-02-2010, 02:52 PM
Merciful1000 Merciful1000 is offline
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Quote:
Originally Posted by balance View Post
Also, I'm curious how the engine and transmission both went out at the same time?
since the engines out I figure why not buy a new trans with less miles. My original trans still works fine if anyone is interested?
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  #7  
Old 06-02-2010, 03:11 PM
balance balance is offline
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How many miles are on it? My car has the same tranny as yours, so if it's up for sale, please let me know.
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  #8  
Old 06-02-2010, 03:25 PM
Merciful1000 Merciful1000 is offline
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Quote:
Originally Posted by balance View Post
How many miles are on it? My car has the same tranny as yours, so if it's up for sale, please let me know.
190k $500 obo
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  #9  
Old 06-02-2010, 05:51 PM
balance balance is offline
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The milage is a little higher than I expected, but thanks for taking the time to reply. If I was you, I'd hold on to it anyway just incase you find a great deal on an engine only. I'm thinking of taking a transmission rebuilding class at a nearby community college and the total cost to rebuild mine myself would be around $600-$1000.

If you put your tranny up for sale on internet auctions, you shouldn't have a hard time selling it though. It was used on the BMW 540i, 740i and 740iL (1995-early 1997), 750iL, and I'm not sure but I believe it was used on 840 and 850 too.
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  #10  
Old 06-02-2010, 07:54 PM
Merciful1000 Merciful1000 is offline
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Thanks BALANCE you've been more then helpful. I really appreciate your input. If there were less miles on the trans I would definitely use it. Although, I wouldn't mind tearing this one down to learn a little something about transmission rebuilding, but storing it is difficult considering my storage space (apartment).
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  #11  
Old 07-25-2010, 11:14 AM
JUNEBLOOD JUNEBLOOD is offline
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I just did one ON MY 96 740 IL and i put the motor from outta the 01 740il with my same harness

Last edited by JUNEBLOOD; 07-25-2010 at 11:17 AM.
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  #12  
Old 07-25-2010, 04:19 PM
balance balance is offline
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Well, that's strange sinse the 2001 model has variable valve timing. I'm pretty sure the 01 has a drive by wire throttle as well. Also, the intake on the 01 is slightly smaller than the 96. You could swap parts from motor to motor, but the harnesses should be different.

Last edited by balance; 07-25-2010 at 04:33 PM.
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  #13  
Old 07-27-2010, 09:39 PM
JUNEBLOOD JUNEBLOOD is offline
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I changed the intake and put my old one on it and i used my old harness some objects wont plug in but the ones that dont like vanos u dont need it will start and run like a new motor do u wanna see it iin my car I HAVE PICS AND IM DOING A TIMMING CHAIN RITE NOW CAUSE IT WAS TICKING JUST A LITTLE AND I WAS RACING AND THE TIMMING CHAIN RAIL BROKE IN PEICES AND FELL IN THE OIP PAN AND MADE THE CHAIN LOOSE AND WAS ABOUT TO TEAR THE TEETH UP ON THE CAM GEAR BUT I COUGHT IT IN TIME SHEESH LOL

Last edited by JUNEBLOOD; 07-27-2010 at 09:45 PM.
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  #14  
Old 07-28-2010, 10:12 AM
balance balance is offline
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RRRRREEEEELLLAAAAXXXXXX Bro, I believe you.

I was just surprised to find out that a motor with variable valve timing (VANOS), would function in a car with an ECU that didn't account for it. I've changed a camshaft in a Toyota that had variable valve timing, and the cam gear used oil pressure to adjust timing. If you put that motor in a car that didn't have it originally, you would get a ticking noise in the head that sounded like it was running with no oil too. Does your BMW motor have this same setup? If it does, you should change the cam while the chain is off. If it doesn't, then you should be good to go. I haven't been that deep in a newer BMW motor before. Just trying to help.

I still think you should use a motor from the same year if you want to swap motors, because it SHOULD make the job easier.
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  #15  
Old 07-28-2010, 12:10 PM
JUNEBLOOD JUNEBLOOD is offline
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LOL I KNOW BUT AT THE TIME I WAS JUST RUSHING TO DRIVE MY CAR SO I WAS WILLING TO DO WHAT EVER IT TOOK TO DRIVE IT THATS WHY I DID IT AND EVERYONE SAID IT WOULDNT WORK AND THEN I PROVED THEM WRONG





THIS IS THE VIDEO
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