My latest addition

[Pinepig]

Hey Jean don't run into that drainpan full of oil putting your car back out of the way........




Just motherfuckin FAIL.

[Jean]

I wasn't aiming for it! ha


Any e34 climate control gurus here? Looking at the 89 ETM right now, but if there are any specific tips/suggestions/known issues to check for I am all ears.

My blower fan works, my a/c compressor kicks in, the idle speed goes up as normal when a/c is on, defroster button lights up and so does recirc. All fuses have been checked with an ohm meter as well.

When the temp. dials are turned even all the way to the right there is no hot or even warm air coming out of the vents. The vent controls (cables) are working as well, so I am trying to confirm exactly what might be blocking or not allowing heat to either flow through the heater core OR maybe the fan is not picking up the hot air from the core.

Looking at the ETM I should probably start by checking the K50 (water pump relay), Y4 (water valve assembly), maybe even flap motors (5 of them ouch), IHKR switch.

Right now I can only eliminate the blower motor, blower relay k4, and maybe the final stage unit N2 since the blower circuit works.

Now, the integrated climate regulation switch (air volume control wheel) is the temp control wheel yes?

Whatever this is it's tied directly in series with the Y4 water valve assembly, and looking at the chart completed the circuit in position 1 (automatic control) vs position 2 (maximum heating). The other end of the water valve assembly Y4 is connected to the IHKR module. The module has left/right heat exchange sensors, evap sensor and outside temp sensors connected to it; along with integrated climate regulation switch (inside air temp sensor / inside temp sensor blower).

Looking further down, I see there is a M34 Dash Vent Mixing Flap Motor also connected to the IHKR module. If I understand this correctly, this is the motor that closes/opens the flap for the fan to blow the air from either the heater core or the a/c evap core, is this correct?

The other 3 flap motors are for the left footwell, air recirc flap and fresh air flap.

M37 water pump is in the same area as the Y4. Gets it's power form the X122 2 pin plug (via K50 relay and F9 15amp fuse). F29 7.5amp fuse controls the relay switch side (connected to the IHKR unit via X35 plug).

Y4 is the thing with bunch of hoses going to it next the firewall / fuse box on the driver side in the engine bay. Gets power form the X85 3 pin plug.

There are two electrical connectors on it - X85 3 pin and X122 2 pin.

K50 is located in the driver side relay / fuse box. Pins 30 and 87 switch the power on / off for the pump.

M34 or "right mixing flap motor" is behind the center dash, RH side of radio. (this will be fun to get to).

--- So, I'll check the K50 relay , M37 water pump and Y4 valve. Hopefully it will be one of these, and not the IHKR module or one of many flap motors.... ARGH

[Jean]

Picked up a spare electric heater valve and water pump from a 93 car, same part numbers and all.

Decided on 18" staggered set in 18x8.5 and 18x9.5 , refinished in gun metal finish.



Looking into Ground Control coils to get the right about perfect, but not too stiff as this is a dd.

[Jean]

Made a little more progress today. Swapped the door panels, replaced the broken door brake. Also tested voltage to the water pump/heater valve. Now I have heat after replacing a relay.

Drove the car for the first time about 20 miles, made it home haha. It did hesitate once like it was running out of gas, so I'll probably swap the fuel pump and filter next.

On to pics



Need to find a matching black cover I know lol





















old panels be gone

[freeride53]

Now those are some proper wheels.
:up:

[Jean]

Testing electrical water pump and heater valve



Looks like someone "fixed" one of the hoses



Spare pump / valve from a later car





Interior so far, consoles, a/c pillars and rear seat is next. Still need to find black b-pillars and knee pad/glove box.











One for every day of the week? haha




Just asking to be driven haha



No cluster back light, all fuses are good, the service lights come up though... damn it.



First trip, about 20 miles or so done, needs suspension BAD... the whole front end shakes BAD if the road isn't smooth and I hit a pothole or bump.

Until next time.

[Jean]

Car just passed smog, I have been driving it a bit and it deff. needs suspension next.

I had no idea they test more than just for emission on the roller and also gas cap test, the new test is also to pressure test the evap system!!!

It passed all 3, so that's good :)

Results with 1/4 tank of whatever gas was still left in the car from PO. New copper plugs and oil change :)

[Yeee30]

congrats.

[LuckyHenriksen]

Sick. I love the black interior swap. I wanna see it slammed :)

[Jean]

Picking up 18" m-pars at the end of the week, still not sure about suspension. I don't want it slammed as it's my DD and it's kind of nice to have a comfy ride...way different from my coil/camber plate e30.

Looking into h&r sport/ b&g or lowtec...i think i'll keep GC for my race car only and do a basic spring/shock combo on e34.

[freeride53]

Nice stirring wheel.

[Jean]

haha, right!

[freeride53]

haha, right!

lol yeah, I reckon It'll be replace with an M-Tech?

[CorvallisBMW]

Ohmyjesusfuck YES.

[F34R]

I love this build so far! I agree with you on the DD ride needs. Coils might be too much to enjoy that wonderful e34. Bilstein sports with springs would be a nice combo.

There was a write up in Car & Driver awhile back about a guy getting info on his e34 suspension. He had Koni sports first but the was unhappy with their performance. So he did the Bilstein sports with his lowering springs(I forgot the brand). But you will not need too much low with those sexy 18s =)

IFTW