Pulling an engine soon, What to know?

[nickmpower]

Is there any thing specail i should know before i pull an engnie in the next few days? things that are commnly forgoten to be disconnected? what should i do about the A/C, just disconnect the whole pump for now, though an e36 engine and pump will probably be going in i dont know what to do with the R12? I've thought plenty about ripping it all out but i dont know if its worth it for me. should i disconnect everything from the wiring harness or just disconnect it from the computer? anything else?

[e9nine]

Believe it or not - it's not as complicated as it sounds. Make sure to disconnect harnesses and wires. Main engine harness, afm, reverse light, heater core hoses, power steering canister, ground wires etc. Disconnect the harness at the ECU and pull it out into the engine bay. Much easier that way. Label the fuel intake and outlet lines, label the coolant lines at the heater core and all other harnesses if you're gonna be putting it  back in or replacing it with another car.

Once you take your time and have good lighting you will see if you forgot anything. Prepare ahead of time by soaking the exhaust bolts at point of disconnection with pb blaster. IF you're gonna pull the tranny with the motor, make sure you angle the car the right way etc. It's been a while since I did it but it's very intuitive.

A/C stuff is supposed to be legally evacuated using proper equipment but u can do as u please so far as you don't tell us what you did. You can unbolt the compressor with the lines still attached to it and "hang it" with an old coat hanger the same way you do when you hang calipers. You will however have to disconnect the condensor and that's where you will pass gas :p

[bmwman91]

Do not forget about the clutch slave cylinder like I did once lol!

The electrical portion is pretty simple.  Ther eis that big harness box sitting under the intake manifold that prettymuch everything conencts to.  Just make sure everythgin is disconnected and that you can move it clear of the motor before removing it.  Be mindful of the brake hydraulics, and disconnect the carbon cannister.  The cannister got in my way when I pulled the motor last time, and I yanked it out (I had also totalled the car and literally yanked it out).  Good luck!

[Vladi]

Everything about the  electrics is plug and play. I just pulled my M42 from an E36 a month ago.
Disconnect the A/C pipes from the compressor and drier, disconnect the carbon canister. As i said, everything is plug and play, you don't need to cut any wires&stuff.
If you want to know something specific, feel free to ask.

[bimma_318iS]

Sorry for being a little of topic.

Did you guys say that an M42 off of a E36 is plug and play for our E30?

[Vladi]

No, we/I said it's plug and play to pull it out of the E36. It's not plug and play to install it in our E30's.

[sheepdog]

Sorry for being a little of topic.

Did you guys say that an M42 off of a E36 is plug and play for our E30?

I am using an e36 engine for my parts, and had a good look at the differences.

For this, you need to use the e30 pans and oil pump pickup. You will also be changing the exhaust header and intake systems, possibly the valve cover, and definately the ignition, possibly the crank and cam sensor (I would to be sure of compatibility). You may also need to change the powersteering pump bracket.

Basically any intake, exhaust or wiring, use the e30 stuff.

[bimma_318iS]

Oh ok...I got excited for a second.

"I am using an e36 engine for my parts" by sheepdog

Are there any benefits?

[sheepdog]

Oh ok...I got excited for a second.

"I am using an e36 engine for my parts" by sheepdog

Are there any benefits?

It has nicer cam gears :p
Same engine really.

[Vladi]

Actually, it's not the same engine.
The E36 M42 has different:
- pistons
- cylinder head
- cam shafts (both)
- exhaust/intake valves
- intake manifold upper part
- intake manifold lower part
- ignition coils
- ECU
- throttle housing assy
- pressure regulator.

There have been a few steps of development in the E36 M42. From 01-1991 to 09-1992, 9-1992 to 07-1994 and finally 12-1994. I've had luck and got a 08-1994 engine. :rolleyes:

[bimma_318iS]

Weird...why would they still call it an M42 if you cant use the parts interchangeably?

[nickmpower]

Im probably going to be leaving the tranny in but when you guys shift to second, does it fly back and engage or is there a slight pause, then it will click in?

so im probably going to be sourcing a lower milage e36 engine. I think it would be a good idea to replace all the gaskets while the engine was out. I have replaced most of the gaskets aleady but anything i should know for that? suggestions for getting the crank bolt off? things to do while im in there?

of course an lightweight fly and clutch suitable for some power

[sheepdog]

Weird...why would they still call it an M42 if you cant use the parts interchangeably?

They interchange and use the same block.

[bimma_318iS]

Actually, it's not the same engine.
The E36 M42 has different:
- pistons
- cylinder head
- cam shafts (both)
- exhaust/intake valves
- intake manifold upper part
- intake manifold lower part
- ignition coils
- ECU
- throttle housing assy
- pressure regulator.

There have been a few steps of development in the E36 M42. From 01-1991 to 09-1992, 9-1992 to 07-1994 and finally 12-1994. I've had luck and got a 08-1994 engine. :rolleyes:

Based on this how is it that they interchange?

[Vladi]

They don't interchange. You can't take parts from the E36 M42 and put them in the E30 M42. I mean...small odds you can, but it's pointless.