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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 10-06-2014, 07:41 AM
BbradenMmillerW BbradenMmillerW is offline
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Mein Auto: 2002 BMW 525i - Black e39
Intake Manifold Removal - Notes & Takeaways

So I took my m54 intake manifold off to replace the gaskets, and I was SUPER stoked to get a look at my intake valves. The inner workings of a motor in general fascinate me - especially these I6's. Plus I have never really taken an intake manifold off of a motor. I've done VCG's, VANOS seals, Cam Timing, Exhaust etc etc, but never an actual intake manifold. Anyhow, this was my take away...

1. The job is not really hard at all. You do want to take your time and not rush. (I took my time because I thought it was so cool!) But, this job is nowhere near as tough as it's made out to be sometimes.

2. Old gaskets not in horrible shape! I had some hissing around the intake ports when the motor was on, so I figured I was dealing with really crispy gaskets. Not so much - they were burnt on the inner ring, but otherwise they were very rubbery and pliable. Nonetheless, I'm glad I replaced them for sure.

3. Wish I had planned more time for cleaning sides of motor. I'm going to take the manifold off again just to clean sometime soon. I cleaned the intake port area really well, and my engine doesn't leak on itself much, but still wish I could have shined it up.

4. Don't freak out about labeling all the connectors. As a matter of fact, BMW made each connector so that it will only connect to it's corresponding unit - either the cords only reach the correct plug, or some have little notches in the sides and different spots than others. Point being, you don't HAVE to pre label. You can, I'm just saying I didn't and had no problem reconnecting.

5. I did not remove the alternator, oil filter housing, or the power steering rez. You don't need to. Just Intake, bellows, DISA, ICV, Throttle Housing, Fuel Rail & Injectors, Dip Stick Tube rotated to side and Electric box pushed towards rear.

6. After re installation w/ new gaskets, it just felt a little stronger and sounded throatier. It could all be in my head, but I know my car and it drives better now. I had no codes or SES, so any changes were minor. (I once had 13 codes, worked down to zero.)

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  #2  
Old 10-06-2014, 09:07 AM
kutcht1 kutcht1 is offline
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Mein Auto: 2002 530iA
Nice Work! and Thanks for the info from your work with photos and all.
TomK
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2002 530iA Sterling grey Metallic 92,000 miles
2006 Volvo XC70 Blue/tan 132,000 miles
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  #3  
Old 10-06-2014, 09:16 AM
BbradenMmillerW BbradenMmillerW is offline
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Mein Auto: 2002 BMW 525i - Black e39
And here she is all buttoned up. Got the windows tinted the next day.
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Old 10-06-2014, 09:27 AM
poolman poolman is offline
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Mein Auto: 525i station wagon
Great Job,,interesting pic's--Intake Valves looked nice and clean...Did you replace all of the vacuum hose's while you were in there?
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  #5  
Old 10-06-2014, 10:03 AM
stickbuilder stickbuilder is online now
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Mein Auto: Touring and others
Wish you had changed the heater hoses/tubes and the CVV while you were there.


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  #6  
Old 10-06-2014, 10:34 AM
BbradenMmillerW BbradenMmillerW is offline
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Location: BOOMER SOONER
 
Join Date: Mar 2014
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Mein Auto: 2002 BMW 525i - Black e39
Intake Manifold Removal - Notes & Takeaways

Vac hoses replaced months ago.

And I actually deleted my CCV. Took off the air distribution piece and capped all 6 ports, and now I have a crankcase breather vented to the atmosphere (from the valve cover CCV opening). I'm fabbing a catch can system and will eventually have a closed system again.

However, I'm considering a hose directly from that valve cover opening to the intake manifold to increase vacuum on the head. Just not sure about it yet. The vacuum would increase exponentially compared to stock CCV set up.


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