BMW 520 model 1993

[salih]

Hi,
My friend I have question.
I have replace my car bmw engine with new engine
BMW 520
MODEL 1993
AFTER I HAVE NEW ENGINE WITH SAME THE OLD NOW I WANT TO START
ENGINE NOW START I OPEN PLUGS SPRING
IT FULL OF BEZEN.

FRIEND CAN ANY ONE TELL WHAT PROCCESS I NEED WHEN I REPLACE ENGINE
ALL

THX

[CarloE34]

Hi,
Can you be more specific in what you mean?
For a manual you can use Haynes Service and repair manual.

regards

[E34-520iSE]

I have replace my car bmw engine with new engine BMW 520 MODEL 1993
AFTER I HAVE NEW ENGINE WITH SAME THE OLD NOW I WANT TO START
ENGINE NOW START I OPEN PLUGS SPRING
IT FULL OF BEZEN.

Why are you replacing the engine? Is it knocking/rattling/smoky? A lot of problems can be fixed without replacing the engine.

HTH,

Shaun

[salih]

Hi,
My friend thx for replay.
Yes it is bmw 6 speed 520 year 1993,
I have replace whole engine with new engine from same model 520 year 1993,

Question

1-Do I need to chnage ECU engine control unit,I put old engine ECU
2-I have with first start I found that engine pump more feul
even the spark plug is now is wet wityh benzen.

3-in case of replace all engine what advise you have for me to do


thx

Why are you replacing the engine? Is it knocking/rattling/smoky? A lot of problems can be fixed without replacing the engine.

HTH,

Shaun

[DaveVoorhis]

1-Do I need to chnage ECU engine control unit,I put old engine ECU

If it's the same model year and type (M50B20) engine, you shouldn't have to.

2-I have with first start I found that engine pump more feul
even the spark plug is now is wet wityh benzen.

Is the new engine running normally, poorly, or not at all? If it's running poorly or not at all, and all the plugs are wet with fuel, I would suspect an ignition problem. Check the crank position sensor, engine grounds, etc.

3-in case of replace all engine what advise you have for me to do

Bring it round to my place Saturday morning and I'll have a look at it.

[salih]

If it's the same model year and type (M50B20) engine, you shouldn't have to.


Is the new engine running normally, poorly, or not at all? If it's running poorly or not at all, and all the plugs are wet with fuel, I would suspect an ignition problem. Check the crank position sensor, engine grounds, etc.


Bring it round to my place Saturday morning and I'll have a look at it.

HI DAVE
your comment belwo
Is the new engine running normally, poorly, or not at all? If it's running poorly or not at all, and all the plugs are wet with fuel, I would suspect an ignition problem. Check the crank position sensor, engine grounds, etc

my question plz what I do with " Check the crank position sensor"
Plz tell your advise how to fix it

[CarloE34]

If it's the same model year and type (M50B20) engine, you shouldn't have to.

Not every ECU is the same as i know.My M50B25 has 3 ECU computers.
Last numbers: 403 - 405 and 413. The 413 is for Vanos.

[DaveVoorhis]

my question plz what I do with " Check the crank position sensor"
Plz tell your advise how to fix it

It's the sensor mounted above the toothed ring around the crankshaft pulley. Disconnect it and replace with a known good sensor, then try starting the car.

I assume your car doesn't start. Right?

It sounds like you have ignition problems. Since the engine has just been replaced, there's a lot of opportunity for disconnected, defective or mis-connected sensors, dislodged relays, cut leads, disconnected ground straps, and defective new engines. You probably need to work through the "Engine Driveability Troubleshooting" table in the Bentley book.

[DaveVoorhis]

Not every ECU is the same as i know.My M50B25 has 3 ECU computers.
Last numbers: 403 - 405 and 413. The 413 is for Vanos.

You're right. I wasn't being clear in my original message. I wrote "same model year," but I should have written "same engine." I.e., if it's the same engine and engine sensors, the ECU should work. If it's VANOS vs. non-VANOS (VANOS was introduced, I believe, with the 93 model year) then it will probably not work.

[Espen]

What was wrong with the old engine? You could try with the sensor from the old one.