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Thread Topic: '71 2002 M20 Conversion Threaded

   
Date: 4-9-08 09:02
From: cjreents in Portland, OR View user's profile
Subject: '71 2002 M20 Conversion

Okay, here it goes.... So, I've been reading this forum for 18 months now and purchased my first 2002 a year ago. After picking up the car (long distance purchase), the engine began to knock. It got so loud that I was only able to drive it for a couple miles. Long story short, the P.O. and I worked out a deal and I kept the non-running car.

The car has been sitting in storage while I tried to figure out what to do with the engine. At first, I looked into having a shop rebuild the engine but a stock rebuild seemed too expensive and used running engines were difficult to come by. I then started reading about the S14 and M20 swaps. The S14 intrigued me since Aardvark racing sells a step-by-step manual. Although the M20 swap was considerably cheaper, cutting up the transmission tunnel scared me to death.

After months of reading, I decided on the M20 swap for several reasons (not to mention cost!). A local junk yard had just received a 1990 325i and I was able to source an e21 323i transmission from another member on the board. My next task was to contact Dan Williams for the engine mounts - SOLD (I bought the last set he had available at the time). Now I was fully committed to the conversion, only problem - I have never really worked on a car other than changing the oil, rotating the tires and wiring a stereo...

...until this last weekend. Got the car out of storage and it now sits in our garage. I started the dismantling process over the weekend and actually pulled the engine and transmission from the car last night! I'm sure I'll be posting more questions as I continue with this swap and will honestly try to document the process as I move along. Thanks to everyone who posts on this forum, it is an invaluable resource!

Cheers,
Chris

Arrival on flatbed


Front


Recovered Recaros


Engine Removal

[/img]


Last edited by cjreents on 4-18-08 09:56; edited 3 times in total



Date: 4-9-08 09:26
From: 70roundtail02 in Pullman/Olympia View user's profile
Subject: Re: SeventyOne 2002 (M20 Conversion)

congrats on the car it looks like you have a really nice clean car to work with. Interior already appears to be sorted so that always a bonus. Good luck take lots of pictures and keep us informed.

Tristan
_________________
1970-resto/mod =money drain
1973 Charmonix, mhh clean

GO COUGS



Date: 4-9-08 09:44
From: cjreents in Portland, OR View user's profile
Subject: Re: SeventyOne 2002 (M20 Conversion)

Thanks Tristan, I'll keep posting. Congrats to Wazzu on the tournament run they had this year, can't say much for my alma mater, the beavs.



Date: 4-9-08 11:46
From: 70roundtail02 in Pullman/Olympia View user's profile
Subject: Re: SeventyOne 2002 (M20 Conversion)

Yea we were all pretty stoked to see them go as far as they did. I'm done in may so i'll be out of pullman here shortly...5 years later. i know there are quite a few 02 guys down in portland that get together at a microbrewery down there
_________________
1970-resto/mod =money drain
1973 Charmonix, mhh clean

GO COUGS



Date: 4-10-08 07:43
From: H_Krix in Atlanta, Ga View user's profile
Subject: Re: SeventyOne 2002 (M20 Conversion)

All this reading about M20's makes me want to do one on my next car...

Good luck man, keep us posted!
_________________

click signature above for my resto blog



Date: 4-10-08 10:29
From: mikekoch in Vancouver, WA View user's profile
Subject: Re: SeventyOne 2002 (M20 Conversion)

Chris, glad to see you're blogging this. Looks like a good start. If you'd like some local help just let me know.

Mike



Date: 4-10-08 12:41
From: cjreents in Portland, OR View user's profile
Subject: Re: SeventyOne 2002 (M20 Conversion)

Harrison -
I've been reading your blog lately - the car looks awesome! Love the "auto trunk lid opener"...


Mike -
I know how it goes with two kids under the age of three, time is hard to come by and yes, kids are fun (well, most kids). Thanks for the reference on the tranny rebuild - I'm sure we'll meet soon!



Date: 4-10-08 04:07
From: Trackmagics View user's profile
Subject: Re: SeventyOne 2002 (M20 Conversion)

Good lookin 02!

I am going to be undertaking this project in a couple months. I am looking forward to your writeup as you make progress on this.

Good luck!



Date: 4-18-08 09:50
From: cjreents in Portland, OR View user's profile
Subject: Re: '71 2002 M20 Conversion

It took 10 days before I was able to find some time to spend a few hours on the car. I was able to disconnect the M10 from the 320i 5spd. Looks like my 228mm clutch and PP is in pretty good shape and I may use with the M20.

I also started comparing the 320i trans w/ the 323i trans and noticed two significant things:
    1. I cannot find the connection for the reverse lights. (Update - Found, just behind the bell housing on top of the trans.)
    2. The speedo drive gear and housing is missing on the 323i. Looks like the drive gear from the 320i will fit, but the housing is too big. I've looked all over the internet (realoem included) but parts listing for the 323i trans are hard to find. May have to put in an email to Blunt.


Metal shavings when I drained the oil from the M10 - maybe it's gold!


Flex Disc is shot:


Out with the old:


In with the new (thanks to JohnN, he loaned me his side mount and engine stand):


Looks like I scored with this electric pusher fan (12") that was used on the old a/c system - I'll use it in front of the new radiator:


Enjoy your weekend!
Chris
_________________
'71 2002 M20 Conversion Blog


Last edited by cjreents on 5-5-08 04:05; edited 1 time in total



Date: 4-22-08 05:56
From: Dsigner in Aliso Viejo View user's profile
Subject: Re: '71 2002 M20 Conversion

Good Luck on the Conversion. I'll be watching with Interest.
_________________
1973 Verona 2002




Date: 4-28-08 08:14
From: BMPOWER View user's profile
Subject: Re: '71 2002 M20 Conversion

What engine mounts are best to use?

cheers



Date: 4-28-08 10:29
From: cjreents in Portland, OR View user's profile
Subject: Re: '71 2002 M20 Conversion

Most swappers use the Dan Williams mounts. You can contact me directly for his email address or post a WTB add in the parts section... You might be able to find someone selling their mounts.

- Chris
cjreents at gmail dot com
_________________
'71 2002 M20 Conversion Blog



Date: 4-29-08 04:19
From: cjreents in Portland, OR View user's profile
Subject: Re: '71 2002 M20 Conversion (Water Pump Theory)

I spent some time over the weekend working on the M20 while it sits on the stand. Replaced the timing belt, tensioner and water pump (first time ever for all three) - I was psyched! Then I started doing some more reading on the cooling system and it seems to me that if I want to use an expansion tank, I need an earlier style water pump that has the inlet that connects directly to the expansion tank. Looks like I'll be replacing the water pump again. See diagrams below...

In this photo the expansion tank is connected via p/n 13 and a "T" in the hose coming off the thermostat housing. This is how my engine is currently setup.
http://www.realoem.com/bmw/showparts.do?model=1113&mospid=47309&btnr=11_1167&hg=11&fg=35

In this photo (earlier model 325i) the expansion tank is connected directly to the water pump via a second inlet/oulet. Consequently, there is no "T" coming off the water hose (p/n 18) from the thermostat housing.
http://www.realoem.com/bmw/showparts.do?model=1113&mospid=47309&btnr=11_1168&hg=11&fg=35

If anyone sees this different, please let me know! Thanks.
_________________
'71 2002 M20 Conversion Blog



Date: 4-30-08 09:45
From: Orangecar in Vancouver, WA View user's profile
Subject: Re: '71 2002 M20 Conversion (Water Pump Theory)

Nice project......I've got a 75 torn down to the shell that I'm building up for track. I was originally planning on doing an m20 conversion and that's the main reason I looked for a automatic, and found the non-sunroof auto, that I'm using. I've decided for now to build an M10 though, I've always wanted sidedrafts on an m10 :)

Anyway, good luck with the conversion, I'll be watching closely to see if I want to take that route in the future.

Lance
Tha Couve, Wa.



Date: 5-1-08 12:40
From: cjreents in Portland, OR View user's profile
Subject: Re: '71 2002 M20 Conversion (Water Pump Theory)

Water Pump Theory Confirmed!

Thanks to Ian for sharing his photos and answering my questions. Indeed, if you want to run an expansion tank on the passenger side of the vehicle you need the older style water pump (P/N 11519071562).
_________________
'71 2002 M20 Conversion Blog



Date: 5-1-08 12:43
From: cjreents in Portland, OR View user's profile
Subject: Re: '71 2002 M20 Conversion

Orangecar wrote:
Nice project......I've got a 75 torn down to the shell that I'm building up for track. I was originally planning on doing an m20 conversion and that's the main reason I looked for a automatic, and found the non-sunroof auto, that I'm using. I've decided for now to build an M10 though, I've always wanted sidedrafts on an m10 :)

Anyway, good luck with the conversion, I'll be watching closely to see if I want to take that route in the future.

Lance
Tha Couve, Wa.


Thanks for the comments, you should also check out Mike's M20 conversion. He's located in the Vancouver as well.
http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,292271/highlight,m20/
_________________
'71 2002 M20 Conversion Blog



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