MVRK - DIY - M/S5X Swap Instruction Thread

M20/M30/M50/Whatever! All engine related stuff here.
mvrk10256
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MVRK - DIY - M/S5X Swap Instruction Thread

Postby mvrk10256 » Wed Nov 30, 2011 6:50 pm

I didnt see an official "Everything You need to know about swap thread" So I have decided to make one here.

You will also find similar threads on e30tech and r3v. however having read all the info on there, and then actually done it myself I have found that a lot of it is nonsense, and to do my best to give you guys accurate information I have compiled what i feel like is a complete guide and shopping list:

NOTE: Through out this I will have sections labeled "NOTE:" - these are my personal thoughts/feelings/experiances - not hard facts. Do with them what you will. They are in blue.

Furthermore i will also include tools, e36 rack swap, and such things that are best done at this time (when the engine is out).

First here are the step by step checklist I promised you:


Check List for Removing the M20 (M10/M42 should be very similar):
-put car into air
-Remove the hood
-Disconnect Battery
-remove fan
-Drain engine oil & coolant from engine & Radiator
-Drain Trans fluid
-disconnect Drive shaft
-disconnect shifter assembly
-Remove the oil Cooler
-drain PS fluid
-disconnect PS lines at compressor
-disconnect AC lines - EVACUATE SYSTEM FIRST!
-Disconnect and Label wires at the battery junction block
-Remove DME box
-Pull the DME cable through the firewall and into the engine compartment
-Remove Radiator, coolant hoses
-remove the high tension wire from ignition coil
-Disconnect and remove the coolant tank
-unclip the main harness connector
-Disconnect AFM and remove intake boot
-disconnect throttle cable/cruise control
-remove the hose connected to brake booster
-disconnect hose from charcoal canister
-unplug the injectors
-disconnect the alternator
-remove wiring harness from firewall
-disconnect fuel lines
-Remove the ground strap
-unbolt engine mounts
-hook up hoist and pull it out.

NOTE: Depending on angle it may be best to remove some of the peripherals (alternator, PS, AC) before hoisting the engine out.

NOTE: Load Leveler is your friend.


Prepping the Engine Bay
-Now is the time to roll the car out of the garage and power wash the crap out of it.
-replace the M20/M10/M42 throttle cable with the M50 e34 Throttle cable

Steering Rack Swap:
-remove old rack and tie rods
-remove Reserviour and lines
-bolt in new rack
--Spacers go on top of the rack
-mount tie rods
-new PS reserviour and lines
-new fluid
-modify the steering input shaft with spacers if needed

NOTE: dont put in the res and lines until after the engine goes in.

Brake Booster:
-Use the IX booster and master Cylinder - Trust me relocation does not work well.
-use L pipe connectors, new brake lines, new clutch line to relocated Tii res.


Transmission Prep:
-powerwash
-replace all seals (front main, rear main, and small shaft seal)
-new shift joint
-bend shift selector rod around
-new slave cylinder
-replace guibo
-new OEM clutch line

M50 Assembly for G260 Tranny:
-M20 pilot bearing
-m20 flywheel
-m20 starter
-Stage 3 clutch
-rebuild transmission gets attached

M50 installation:
-attach motor mounts to frame
-hoist engine into car - line it up against motor mounts
-get shift linkage set up
-trans brace, mounts into place
-attach driveshaft to guibo
-screw down engine mounts
-attach PS lines to pump
-attach AC lines
-push harness through firewall
-connect DME
-hook up coolant hoses
-install radiator and attach hoses
-connect wiring harness with adapter
-connect throttle cables
-connect lines to charcoal canister
-connect fuel lines
-install MAF, connect wires, install air filter
-Fill engine with coolant and oil
-refill the transmission with trans fluid
-reinstall electric fan and connect
-test start the engine

Exhaust:
-ebay headers work well.
-Y pipe to flex pipe to 3" pipe. Because racecar.

Now that you know whats going to happen lets talk money. Here is my shopping list:

I spent about 3 grand up front for everything. After I sold all my old M20 parts and stuff I got for free with my motor the total swap cost about 900 bucks. Just to give perspective.

Here are the price lists i promised:

Tools:
Image

Engine Rebuild:
Image

General Parts:
Image

Engine mods:
Image

Clutch and Trans:
Image

e36 power steering swap:
Image



LESSONS LEARNED:
-Be prepared to fab quite a few things at home.
--Brake Res bracket:
Image

--Shift Carrier (DIY LINK http://e30performance.info/viewtopic.php?f=22&t=1566)
Image

--Power Steering bracket
--Host of other stuff I have forgotten about
-Do the wiring harness yourself or contact someone you trust. I had Mr.EricT do mine, but I had to fix quite a few things, so I am not a happy customer.
-Exhaust has to be custom built. Not too expensive or crazy, but be aware.

Now I am sure there is information that needs to be in this thread that isnt. That said please feel free to add to it. ! Lots more pictures and information can be found in my build thread on either R3v or E30tech.

Happy Modding.
Last edited by mvrk10256 on Mon Dec 19, 2011 9:25 pm, edited 1 time in total.
-Maksim

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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby M20_fever » Wed Nov 30, 2011 7:08 pm

sticky!
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby Nsquared97 » Wed Nov 30, 2011 9:39 pm

Wow, great work, thanks for posting this!
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby mvrk10256 » Wed Nov 30, 2011 9:48 pm

M20_fever wrote:sticky!


I guess I really am on a roll. Unfortunately I have run out of stuff for now.


Nsquared97 wrote:Wow, great work, thanks for posting this!


Thanks. I am sure there is stuff missing from this but it is a good starting point.
-Maksim

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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby mvrk10256 » Mon Dec 19, 2011 9:26 pm

NOTE: when you rebuild your engine (since its out of the car) make sure to pay special attention to the oil filter housing.

there are several plugs held in by clips, they have shitty orings behind them that will start to leak. Also make sure you use the OEM block to housing gasket. $5 at the dealer and made of much softer and nicer rubber than the VR stuff.
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby ten2doyle102 » Thu Dec 29, 2011 2:42 pm

hey,

I have a buddy of mine that is trying to swap his 1984 325e... however, it doesn't have the body side connector that you need where it goes to the fuse box and such....Apparently the 1984's didn't have this I guess? how does one get around this to install everything?
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby mvrk10256 » Thu Dec 29, 2011 5:33 pm

ten2doyle102 wrote:hey,

I have a buddy of mine that is trying to swap his 1984 325e... however, it doesn't have the body side connector that you need where it goes to the fuse box and such....Apparently the 1984's didn't have this I guess? how does one get around this to install everything?


The early models had a square connector instead of the round ones. As far as i remember the main wiring is the same but you just need to get a different plug end. Basically he can use the plug from his stock harness and attach it to the M5X harness, same as you would with the round port.
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby ten2doyle102 » Thu Dec 29, 2011 7:06 pm

Ok.... but what if we seriously can't find this thing? Its supposed to be right on the fire wall, but its not.
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby mvrk10256 » Thu Dec 29, 2011 7:49 pm

ten2doyle102 wrote:Ok.... but what if we seriously can't find this thing? Its supposed to be right on the fire wall, but its not.



It has to be somewhere over there. I mean there is no way for the body to not be connected to the engine. his guages wont work or anything else for that matter.

Some more info:

Image

more info:
http://www.e30tech.com/forum/showthread ... 076&page=6
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby ten2doyle102 » Wed Jan 04, 2012 5:07 am

Thanks man. I will do some more digging.
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby Space Dynamics » Sun Jun 03, 2012 6:28 pm

Are the engines interchangeable? Say you want to go from an m50 to an s52?
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby Yoshi » Sun Jun 03, 2012 7:24 pm

Kind of interchangable. Most people do an S52 in an E30 with an OBD1 electronics swap. You can keep the S52 OBD2 but it's harder imo. The mounting and such is all the same. Same motor, different displacement and sometimes transmissions.
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby Terry » Sun Sep 02, 2012 5:35 am

Can you elaborate why relocating the stock booster is a bad idea?
I found a diy I would like to try using the stock booster: http://www.r3vlimited.com/board/showthread.php?t=250474
... I don't like to estimate my hourly worth, but I figure if I can do this in under 5 hours, it's worth it to me.
Any opinions on this method?
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby Yoshi » Sun Sep 02, 2012 1:50 pm

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What's this for?
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Re: MVRK - DIY - M/S5X Swap Instruction Thread

Postby Yoshi » Sun Sep 02, 2012 1:52 pm

Terry wrote:Can you elaborate why relocating the stock booster is a bad idea?
I found a diy I would like to try using the stock booster: http://www.r3vlimited.com/board/showthread.php?t=250474
... I don't like to estimate my hourly worth, but I figure if I can do this in under 5 hours, it's worth it to me.
Any opinions on this method?

Relocating makes tons of places for water to get into your car. It also physically moves over the pedals the same amount. Makes your clutch kinda funky IMO. It's a viable option but It's much easier to just get a diff booster. I have the zionsville one I think. Modded E21 booster. Haven't had problems with it at all. Feels stock.
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