Planning a "mayor" tune-up

[cn90]

At 110K miles...

1. OFH Gasket is $6 at dealer.

2. CCV Mod.

3. PARTIAL cooling overhaul (FULL overhaul; at 150K-160K etc.).

You can find DIYs for all three of these in forum. I posted some of these DIYs.

[andrewwynn]

Originally Posted by titodj

I got me a 2005, 3.0i with 110k



I can see that the oil filter housing gasket is leaking, and the oil has "dripped" on top of the alternator, so it looks covered by oil.





The plan is to replace the gasket, but at the same time I'm planning to:



1- Pressure clean the injectors

2- Replace spark plugs

3- Replace valve cover gasket

4- Replace belts and tensioneers

5- Replace the upper oxygen sensors

6- Any vacuum line that looks damaged



Should I replace the water pump and thermostat too?

How can I clean the alternator without damage it?

OFHG or just filter gasket? My mechanic didn't replace o-ring when did oil change and my entire engine was covered in oil shortly after, got in my alternator and messed it up.

If you take off the alternator to clean it is very robust. I replaced the slip rings and brushes for $20 and cleaned the crap out of the thing before reassembling. I used Dawn dish soap and scrub brush inside and out before putting the voltage regulator back on.

I rinsed it under the facuet of a mud sink. Like I said "robust".

Take a popcicle stick or similar and poke the folds of the intake boot. They fail in the grooves and will give you lean codes.

[Drevco]

Originally Posted by titodj

I got me a 2005, 3.0i with 110k



I can see that the oil filter housing gasket is leaking, and the oil has "dripped" on top of the alternator, so it looks covered by oil.





The plan is to replace the gasket, but at the same time I'm planning to:



1- Pressure clean the injectors

2- Replace spark plugs

3- Replace valve cover gasket

4- Replace belts and tensioneers

5- Replace the upper oxygen sensors

6- Any vacuum line that looks damaged



Should I replace the water pump and thermostat too?

How can I clean the alternator without damage it?

What else should I address while I have everything apart?



Thank you for your Ideas and comments !

Change the Oil Pressure Switch, Bentley Manual says change to 120.000km (at least for the V8). $6-$20 aftermarket-original.
Starts to leak thru the plastic part.

[andrewwynn]

I have to check that part I have a mystery slow leak that has my skid plate all oil film covered but no puddles under the car. I'm sure my oil sensor is original.

[Drevco]

Originally Posted by andrewwynn

I have to check that part I have a mystery slow leak that has my skid plate all oil film covered but no puddles under the car. I'm sure my oil sensor is original.

It may be that. After rebuild “my” engine “we” were mad at the oil drop in the parking places. And the smell of oil no matter driving style (even at idle).
Cleaned the engine bay, the “belows”
and the “leak” showed up.

In Bentley Manual is indicated to be replace to 120.000km Oil Change.
I did at 220.000km.
BTW Schwaben scanner noted the fault up!

[wpoll]

Originally Posted by Drevco

Change the Oil Pressure Switch, Bentley Manual says change to 120.000km (at least for the V8). $6-$20 aftermarket-original.
Starts to leak thru the plastic part.

I have (well... had) the same part on my BMW motorcycle and it leaked in exactly the same way. Replaced it with an OEM part and it failed too! Went aftermarket after than and no more trouble.

[Scott ZHP]

Might want to check your power steering reservoir hose while you're in the area.

[g300d]

When I did repairs in that area I did all the little coolant hoses as well, those that supply the heater circuit. All in all I did every rubber hose.

In the M54 it's a good time to do that as those hoses are usually buried under the parts you are servicing now.

Good reminder on the intake boot, I experienced that too. Which reminded me, you may want to pull your DISA and check that the flapper mechanism is still in good condition. I checked mine when I replaced my intake boot and it was on the verge of failure.

[andrewwynn]

I repair my disa valve using a kit that replace the plastic flapper with a titanium screw and aluminum flap. It cost 70% less and is 10 * the design


Sent from my iPhone using Tapatalk Pro

[titodj]

Thank you all for your tips, and replies, I have updated my todo list with new additions plus the replacement of the Oil filter housing gasket.

1- Pressure clean the injectors
2- Replace spark plugs
3- Replace valve cover gasket
4- Replace belts and tensioners
5- Replace the upper oxygen sensors
6- Any vacuum line that looks damaged
7- CCV and Vanos oil line and gaskets
8- Oil pressure switch
9- Water pump and thermostat
10- Coolant expansion tank and thermostat
11- Manifold gasket
12- Disa valve upgrade kit (I was clueless about this potential problem)

I guess I'll have a busy weekend....