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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-28-2014, 09:29 PM   #1
AdaRi
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Join Date: Dec 2013
Location: Sacramento CA
Posts: 30
My Ride: 2004 325i e46 sedan
Auto-RX before or after full CCV replacement?

Hello all
So I replaced my valve cover gasket recently and noticed quite a bit of build up on the front of the crank.
(Previous owner seriously neglected this car)
I did research and found good reviews on auto rx. Figured i would use it to get rid of this build up. I know I will have to do a heavy dose twice and a thorough rinse according to the instructions givin on the site.
My delema is that I have noticed a small oil leak towards the rear bottom of the engine. All my research leads me to the ccv/vanos lines.
I have already replaced the following items:
Expansion tank
Belts
Pulleys
Thermostat
Water pump
Power steering pump
Power steering reservoir and hoses
Fuel pump
Both fuel tanks
Oil filter housing gasket
Valve cover gasket
Coils
Spark plugs

The car has 190k on the engine
I know there is build up in the ccv vanos. I have slight loss of power when I release the gas pedal. Almost as though it is lightly braking on its own.
Automatic steptronic

I have also just seafoamed the car. Worked amazingly! She is so much smoother!

I am worried about the build up near the crank though. I know it can turn to a serious headache if I do not correct.
My question is if I should do the auto rx treatment before replacing the ccv/vanos or wait til after the change?
I'm afraid that if I wait til after, it has a chance to clog the new vanos lines.

I appreciate any help that anyone has to offer and for reading this long post. Lol
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Work in Progress.
2004 325i Sedan GrauGruen Metallic
Beyern 19x9.5 front, 19x10.5 rear
Clear LED side markers
Black Roundels
Smoked m3 tails
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