Another for the Collection - Mtech 2 Vert S50!!

[clarkson]

Very clean as per usual with you...good info too.

[KIRIEIW]

Brake booster hose is now complete! I bought all brand new parts because I forgot where I left my stock e30 M20 brake booster hose. Turned out it was still attached to the M20 engine in the backyard lol. Oh well, I had already bought everything new from work plus this way I know all should be well for another 26 years.

The goal was to replicate the e34 brake booster hose routing, which I think came out pretty damn well. I'll attach a pic of our family's e34 which only has like 98k miles or something, basically an un molested e34 with a M50 under the hood which is damn near identical to a S50.

The pictures speak for themselves.. All original BMW parts from the dealer except the check valve were used for this set up for those with future swaps interested. Only reason I got an aftermarket check valve was the cost difference didn't make sense, but the aftermarket valve is the same part number and looks identical to the original BMW valve.

- 90° fitting which connects into the brake booster (picture number 1) 34-33-1-158-930
-Length of hose booster hose (I opt to buy brand new booster hose at the dealership) 34-33-1-115-926
- 90° check valve (the white/ black valve pictured) 34-33-1-156-579
-Another length of hose ran off the manifold nipple (same part number/ hose above)
-Optional, a factory clip to secure your throttle cable like BMW would have 11-78-1-311-588
-Hose clamps




Stock e34 set up:

[jeenyus]

That makes sense and after I asked I figured cost was a big part of that as well.

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[KIRIEIW]

Good work. Why one-time use clamps vs c-clamps?

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Honestly just cause. I got the entire pack on amazon for like $25 bucks or something. I'm also planing on using them for the brake booster hoses because that's what they used originally on those hoses. I'm thinking the plan is to get the car fully legal/ BAR'd with California smog which requires me bringing it to a state inspector after I'm all said and done with the swap. The more original, the better my chances for passing I'd say (at least I hope :D).

[jeenyus]

Good work. Why one-time use clamps vs c-clamps?

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[parkerbink]

Nice.

[KIRIEIW]

So lots of work happened and no updates.

-Throttle cable hooked up/ installed
-Charcoal canister valve hooked up and installed
-Brand new Genuine BMW firewall grommet installed
-Brand new Genuine BMW ECU mounts
-Radiator installed
-Radiator fan installed (damn its close!!)
-Various coolant hoses
-Lot's more..


She's a runner now :D. I'm still waiting on a few various parts, such as a new brake booster check valve and clutch slave line (the new e30 clutch line I purchased just last year doesn't fit, need to use a e36 line). Today I'll be messing with the M3 firewall covers and the dipstick mounting bracket. For some reason both those things have been giving me the most trouble out of this entire swap..

[KIRIEIW]

Yup, the M3 parts car was R134 (so that’s what the compressor was always exposed too). If I was to ever completely fix the AC system I’d change out the condenser, majority of the O rings, ect. like suggested but who knows, that’s another project for another day. I know R12 and 134 oil don’t mix well with each other..

Out of all the e30’s I’ve owned I was lucky enough to have one with working AC.. and it happened to be a convertible. It was still somehow on R12.


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[dude8383]

To add onto the R134 bandwagon... I would highly recommend switching out to a parallel flow a/c condenser as well.

[jeffnhiscars]

Thanks for the offer might need to take you up on that some day :D. Whats the plan, put the S52 into your Mtech vert?


So the issue with the AC lines is the e36 AC compressor uses different fittings, stock e30 AC lines wont bolt up to a e36 style compressor. I'm sure you could probably find lines already made online but basically what your doing here is cutting the compressor fittings off of both sets of AC lines and somehow attaching the e36 fittings to the e30 lines.

Many hydraulic shops also do AC line repairs and can easily swap out fittings. There's also a chain of such shops called Pirtek who I've used as well. Not the cheapest (tell them it's for a shop) but all they do is hoses.

I'm also quite certain e36 came with 134 which means the compressor will not be as efficient w r12

[kid8]

I'd think you'd want R134A since you're using the e36 compressor. Don't forget PAG oil. Keep up the good work, looks great!

[KIRIEIW]

I can get R12 if you need it. It's also available on eBay. Tell me more about those e30 vs e36 ac lines, since I'm an old man and would need to keep the ac in my swap as well.

I've got a full 1998 M3 car to swap over, so I want to know which parts I should keep, if applicable.

Thanks for the offer might need to take you up on that some day :D. Whats the plan, put the S52 into your Mtech vert?


So the issue with the AC lines is the e36 AC compressor uses different fittings, stock e30 AC lines wont bolt up to a e36 style compressor. I'm sure you could probably find lines already made online but basically what your doing here is cutting the compressor fittings off of both sets of AC lines and somehow attaching the e36 fittings to the e30 lines.

[Cha Ching]

I can get R12 if you need it. It's also available on eBay. Tell me more about those e30 vs e36 ac lines, since I'm an old man and would need to keep the ac in my swap as well.

I've got a full 1998 M3 car to swap over, so I want to know which parts I should keep, if applicable.

[KIRIEIW]

So I got my custom AC lines installed along with bolting the e36 AC compressor to the engine this afternoon. Some local guy was parting out a M50 swapped e30 over in Piedmont aka Oakland, CA. I drove over with a buddy months ago to pick up a few other things and he happened to have some AC lines in the shop. I offered him $40 bucks or something which he took. Can't remember your name but thanks dude they worked perfectly. At the same time I replaced the O rings for the lines, I have no clue if I'll ever charge up the AC system but at least the systems sealed and I now have that option later down the road. Technically the AC would work if I pumped in some R12?



e30 AC lines with e36 fittings on the ends (since e36 AC compressors use different fittings)

[KIRIEIW]

Are you going to run an oil catch can? That oil vapor goes right back into the intake and soaks it. Depending on how you have your air filter set up it will soak your filter with oil as well. This is in an on going problem I have been dealing with, with my S50 for years.

Damn I actually never heard of that issue on S50's.. I guess for now I'll ride around stock and if it really gets as bad as you say I'll look into a catch can or something.. That sounds pretty lame though man.