Anyone upgraded M54 to M62/N62 or anything else?

[Bmwe5320023.0]

Haha thanks, got the engine out!

I found a piece of transmission bellhousing cracked and broken off. I heard the driveshaft can do that. I'll get someone to weld it on.

I pressure washed the engine, it was too dirty to do anythjng on it...I wanted to bolt it to the stand, but the bolts from transmission to engins were too short...

I ordered some more bolts and will try again tomorrow.
I guess you bolt it at the back of the engine?

For now I'm sandblasting and cleaning all the parts I'm removing.

I'm taking apart the rear diff from 4.8 and installing the locker kit from ecs tuning.

Apparently the rear antiroll bar is thicker on 4.8, I'll need to verify that.

A big disappointment is the front subframe. I was stupid and thought they were the same, and damaged the one from 4.8.
Well I should've thought it better, since V8 and i6 engines have different mounting points, so now I'll have to find another front subframe from V8.
I wonder if engine point points on 4.4 and 4.8 front subframes are the same or different.

Next step is to secure the engine to the stand, and to remove carpets and dash/center console from the donor to obtain the needed wiring.



upcase

[Homerlovesbeer]

Nice work!

It's a monster engine and transmission when out of the car isn't it!

This is mine undergoing surgery

[Bmwe5320023.0]

Nice work! I don't feel so lonely anymore
Just stripping the inside now, getting the full wiring harness now to see how I go about that...

[Bmwe5320023.0]

First major problem...was going to install ecs tuning locking diff kit into N62 rear diff, but turns out the diff washers are too large.
While ecs tuning website says that the kit will fit X5 2005 N62, in reality it's made for medium diffs. And N62 has a large diff. Now that really sucks, the kit was very expensive. So I guess unless I run both front and read diffs from M54, I won't be able to use the locking diff kit.
But even if I find a way to use them, the rear diff might blow up lol? It's medium, so on N62 engine might be too weak




home of grace

[Henn28]

That’s bizzare that ECS screwed up the diffs! I think you’d be fine swapping out the n62 diffs with the m62 diffs. The 4.6 E53s shared the same diffs as the 4.4 versions and the 4.6 makes almost as much power as the b48 version of the M62. An xtra 10 or 15 HP shouldn’t blow the diff up.

The question is, will the front diff from the 4.4/6 bolt to the oil pan of the 4.8? I doubt it as they look different on RealOEM and have different part numbers. I bet Quaife makes one that’ll fit.

[Bmwe5320023.0]

Well I could swap both diffs from my M54, but there would be 2 problems.
#1 Transmission expects different gear ratios and will likely be throwing codes. M54 diff is 4.1, N62 is 3.91 I believe
#2 M54 medium size diff is weaker than N62 large diff, so maybe it will blow up lol, who knows. I'd prefer to take advantage of the large diff. My M54 is probably around 200HP, while N62 is about twice that...

I'll see if ecs tuning will return/refund or exchange for other parts...I think I'll just get racingdiff kit for rear diff
https://ebay.us/m/nuynLx

I'm just trying to put the diffs back together, but the spider gears just won't fit back lol. I'll try putting them in a freezer

[Bmwe5320023.0]

Well I got lucky, ecs tuning agreed to a one time exception, and will give me store credit for this return.

The freezer trick worked as well, and I was able to put the diff gears back together.
Here I included some pictures from M54 medium diff, but the setup is exactly the same as on N62 large diff, just parts are bigger.
I've already put the 215k diff gears back after freezing them in the freezer, but I wonder if I did it right.
I should've taken pictures along the way of disassembly, but I was not expecting to reuse the concave washers and ring gears, as per Ecstuning.com instructions.

When it turned out I needed to put back original parts, I couldn't remember how they were lol.

There's only 2 washers that go on each side of the large top and bottom gears.
I think first I need to install the concave washer, with concave portion toward the flat part of the spider gear. Then install the flat washer, which would then contact the convex side of the first washer.

As for the 2 side spider gears (smaller), they only have one thing washer, so you can't go wrong on that.

[Bmwe5320023.0]

[Bmwe5320023.0]

Moving along...





ghislaine de boysson

[Homerlovesbeer]

Wow!

You are REALLY making headway on that! It's like you've made the old girl naked

I can't believe how fast you are getting this done. Have you done a lot of this type of stuff?

Yea, remembering how to put stuff back together can be a problem lol.

That 4.8is didn't happen to have a DSP amp in it at all?

A trailer control module?

I'm after them.