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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 01-19-2011, 09:28 AM   #1
tony2x
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What to do alongside CCV & Vanos replacements.

I'm about to replace the CCV and Vanos units on my 196k 330xi. I intend to change all the valve cover gaskets and plugs while I'm at it and wondered if there was anything else I should tackle while I've got things apart. According to the service history the car is still on it's first water pump and radiator and I understand these are common failure points and upgraded versions are available for example.

I'm about a 4/10 in mechanical ability, I can change brakes, shocks, interior parts and do my own servicing and minor electrical work. but have never really had an engine apart. I have the Bentley service manual and can get hold of specialist tools if required.

The car itself has a full service history and has not had any major work over the years, just a lot of wear and tear maintenance. It is also my daily driver that I intend to keep for many years to come so investing now in the car's longevity is no problem.

Last edited by tony2x; 01-19-2011 at 09:29 AM.
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Old 01-19-2011, 09:49 AM   #2
SamDoe1
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Well you aren't really going to be taking the engine apart, just what's around it. Might as well give the whole car a once over while you're working in the engine bay.

Anyways, while you're at it I would also do the following:
Clean the MAF and ICV
Check all your intake lines for any cracks or holes
Replace the air filter and the cabin filter
Check the DISA to make sure it still works, replace if not
FOR SURE replace the water pump, you're on borrowed time here
Radiator is probably still ok but changing it sure won't hurt
Have you done the rest of the cooling system yet? If not, do it now before it explodes
Change all the driveline fluids (if you haven't done them recently). If you have a manual that is, if you have an auto I can't speak to that. But do the diffs and transfer case either way.
Check all the suspension components for wear. Bushings, ball joints, springs, shocks, etc.
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Old 01-23-2011, 01:56 PM   #3
truajb
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Make sure you change your expansion tank as it's really prone to crack. Mine just showed a crack at 140,000km. You are lucky if you haven't had any issue yet but should have it replaced. I assume you will be replacing all the hoses attached to your oil separator right?
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Old 03-27-2011, 04:04 AM   #4
tony2x
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Quote:
Originally Posted by SamDoe1 View Post
Well you aren't really going to be taking the engine apart, just what's around it. Might as well give the whole car a once over while you're working in the engine bay.

Anyways, while you're at it I would also do the following:
Clean the MAF and ICV
Check all your intake lines for any cracks or holes
Replace the air filter and the cabin filter
Check the DISA to make sure it still works, replace if not
FOR SURE replace the water pump, you're on borrowed time here
Radiator is probably still ok but changing it sure won't hurt
Have you done the rest of the cooling system yet? If not, do it now before it explodes
Change all the driveline fluids (if you haven't done them recently). If you have a manual that is, if you have an auto I can't speak to that. But do the diffs and transfer case either way.
Check all the suspension components for wear. Bushings, ball joints, springs, shocks, etc.
Thanks for this! I just got around to replacing the Vanos and did pretty much everything on this list. This may sound like a very basic question but how would you go about cleaning the MAF & ICV? Are there particular types of cleaners for these? Also, how do you check the DISA. I thought they were only on the 4 cylinder lumps?

My car is still low on power and the SES light came on after I changed out the Vanos. I'm going to pull the codes tomorrow and see what is what but the car is running better than it was, just not perfectly.

The water pump was replaced with one with a metal impeller and the coolant system had been overhauled at 188k just before I bought the car. Fortunately the previous owner has his own German car repair business so it came to me in pretty good shape.
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Old 03-27-2011, 01:03 PM   #5
SamDoe1
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Quote:
Originally Posted by tony2x View Post
Thanks for this! I just got around to replacing the Vanos and did pretty much everything on this list. This may sound like a very basic question but how would you go about cleaning the MAF & ICV? Are there particular types of cleaners for these? Also, how do you check the DISA. I thought they were only on the 4 cylinder lumps?

My car is still low on power and the SES light came on after I changed out the Vanos. I'm going to pull the codes tomorrow and see what is what but the car is running better than it was, just not perfectly.

The water pump was replaced with one with a metal impeller and the coolant system had been overhauled at 188k just before I bought the car. Fortunately the previous owner has his own German car repair business so it came to me in pretty good shape.
You can buy MAF cleaner for the MAF. For the ICV you can use any parts cleaner along with some Seafoam Deep Creep to help lubricate it. The DISA valve will sound like a jar of marbles if it's broken or has failed. It just makes a rattling racket in the engine bay. They are on all the M54 engines. Let us know what the codes are and I'm sure we can point you in the right direction.
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Old 03-27-2011, 05:52 PM   #6
dlmrun2002
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newbie here.. What is the DISA valve?
dlm
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Old 05-01-2011, 04:14 AM   #7
tony2x
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Quote:
Originally Posted by SamDoe1 View Post
You can buy MAF cleaner for the MAF. For the ICV you can use any parts cleaner along with some Seafoam Deep Creep to help lubricate it. The DISA valve will sound like a jar of marbles if it's broken or has failed. It just makes a rattling racket in the engine bay. They are on all the M54 engines. Let us know what the codes are and I'm sure we can point you in the right direction.
I finally got around to diagnosing the code and lack of power on my xi today after picking up a USB code reader from eBay. The code pointed to an open circuit on the VANOS inlet sensor. Now I'm feeling *very* stupid as it turned out one of the connectors wasn't seated properly so the VANOS was not working at all.

Now the car is transformed, plenty of power across the range and the driveline shunt has disappeared entirely.
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Old 05-01-2011, 10:12 AM   #8
truajb
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Originally Posted by tony2x View Post
I finally got around to diagnosing the code and lack of power on my xi today after picking up a USB code reader from eBay. The code pointed to an open circuit on the VANOS inlet sensor. Now I'm feeling *very* stupid as it turned out one of the connectors wasn't seated properly so the VANOS was not working at all.

Now the car is transformed, plenty of power across the range and the driveline shunt has disappeared entirely.
Was the check engine light or other fault lights on. I always wonder if the vehicle will always throw a code when something wrong is detected or you have to hook up a reader to pull the code???
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Old 05-01-2011, 10:21 AM   #9
tony2x
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Originally Posted by truajb View Post
Was the check engine light or other fault lights on. I always wonder if the vehicle will always throw a code when something wrong is detected or you have to hook up a reader to pull the code???
The CEL was illuminated but none of the other lights were. Not all codes will throw a check engine light, some do. The only way to read the actual fault codes is with a code reader. If you have a laptop running WinXP (or use XP Mode in Win7) then you can pick one up on eBay for about $60 from HKG or China.
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Old 05-01-2011, 11:23 AM   #10
SamDoe1
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Originally Posted by dlmrun2002 View Post
newbie here.. What is the DISA valve?
dlm
The DISA is the intake adjuster valve. It basically changes the length of the intake runner as you go to higher RPM in order to give you more horsepower on the high end and more torque on the low end. It breaks fairly often.
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Old 06-23-2011, 08:30 AM   #11
association16
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Originally Posted by SamDoe1 View Post
The DISA is the intake adjuster valve.
Where is the DISA?
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Old 06-23-2011, 08:58 AM   #12
tnhl1989
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you should change out the oil housing gasket while you got things apart. check the belts as well.

what code came up on the vanos? i am facing probably the same problem since i just did the vanos seals.
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Old 06-23-2011, 08:59 AM   #13
SamDoe1
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Quote:
Originally Posted by association16 View Post
Where is the DISA?
It's the black rectangular box attached to the driver's side of the engine/intake manifold.
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Old 06-30-2011, 02:10 PM   #14
association16
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awesome thanks SamDoe1
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Old 06-30-2011, 02:29 PM   #15
TiAgXi
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Originally Posted by SamDoe1 View Post
It's the black rectangular box attached to the driver's side of the engine/intake manifold.
Part number 11617544805.
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