[specialized2010]

Do you guys have actual pics of these valves you removed/installed. Just a little curious..

 

[Ishi]

I replaced all four of these today. It wasn't too bad.. a little swearing and sliced up fingers, but ok.

The two above the bell housing were a bit of a PITA because getting a socket drive in there with a bit was pretty much impossible. I used a T30 socket and wrenched on it with a 6 mm open end wrench. You also need to unsnap the vent hoses from their holders behind the intake plenum so they can be pushed up off the valves.

All four were a PITA to pull out, but the ones above the bell housing were a little easier because you can get a screwdriver on them to pry them out. Before installing, I liberally greased all the o ring connections to make sure they come out easier next time.

Driver side

View attachment 935208


Passenger side

View attachment 935210
View attachment 935211


Vent hoses behind plenum

View attachment 935212


Hose holders

View attachment 935213


Two valves above bell housing

View attachment 935214
View attachment 935215

I replaced all four of these today. It wasn't too bad.. a little swearing and sliced up fingers, but ok.

The two above the bell housing were a bit of a PITA because getting a socket drive in there with a bit was pretty much impossible. I used a T30 socket and wrenched on it with a 6 mm open end wrench. You also need to unsnap the vent hoses from their holders behind the intake plenum so they can be pushed up off the valves.

All four were a PITA to pull out, but the ones above the bell housing were a little easier because you can get a screwdriver on them to pry them out. Before installing, I liberally greased all the o ring connections to make sure they come out easier next time.

Driver side

View attachment 935208


Passenger side

View attachment 935210
View attachment 935211


Vent hoses behind plenum

View attachment 935212


Hose holders

View attachment 935213


Two valves above bell housing

View attachment 935214
View attachment 935215

Good job.

Can you also track and post your oil consumption post valve replacement?

I'm seeing oil seepage on the wiring harness below passenger side valves and will probably also change out.

 

[sunilshivaram]

Update:
I clocked about 900 miles with my Oil indicator at +1.1L.

It used to be +1.2L after I put the car back together after replacing the exhaust headers, and I reset the odometer once it hit +1.1L. After 900 miles, it dropped to +1.0L. I drove another 26 miles and it dropped to +0.9L immediately. very strange, but still acceptable. After another 80 miles, its still at+0.9L.

I have been riding the car pretty hard at times, glad to have it all back together. It was unused for nearly 6 months when I was replacing the exhaust headers with OEM with catalytic converter.

 

[Emfiver]

Interesting thread. Just one small item to consider on the pcv operation. Remember pcv stands for positive crankcase ventilation. You mentioned earlier about vacuum in the crankcase drawing the oil/vapor from the intake manifold but the crankcase is not likely ever drawing a vacuum (maybe when the engine gets shut off). The crankcase is pressurized primarily by some of the combustion gasses getting past the piston rings. The intake draws a vacuum but on an ITB setup we don’t have that large plenum chamber post throttle which has a large volume of air.

So it seems there are valves to drain excess oil back to sump but generally PCV valves are just to vent crankcase pressure (nasty oily, fuely vapor) into the intake so it can get burned up in combustion. One of the benefits of dry sump systems is the ability to draw a light vacuum in the crank case which reduces parasitic power loss.

 

[sunilshivaram]

Update on this:
After PCV Replacement, i drove the car for 900 miles, with level at +1.1L on the dash.
After 900 miles, it drops to +1.0L.
In another 26 miles, it drops to +0.9L. I keep driving it, and it was at +0.8L for a while, for nearly 450 miles.
SO, i have covered about 1350 miles now with a 0.3L consumption of oil, apparently.
Yesterday, it recomputed again while driving and the level drops to +0.2L !!! What the Heck. Straight from 0.8 to 0.2. This is very disappointing, depressing, and has demolished my confidence in this car. The (un)reliability of this car is beyond belief.

How do I know on next reading in another few tens of files it won't drop down to negative 1L ?

I was thinking the consumption and oil level drop will be linear with miles.

 

[specialized2010]

Update on this:
After PCV Replacement, i drove the car for 900 miles, with level at +1.1L on the dash.
After 900 miles, it drops to +1.0L.
In another 26 miles, it drops to +0.9L. I keep driving it, and it was at +0.8L for a while, for nearly 450 miles.
SO, i have covered about 1350 miles now with a 0.3L consumption of oil, apparently.
Yesterday, it recomputed again while driving and the level drops to +0.2L !!! What the Heck. Straight from 0.8 to 0.2. This is very disappointing, depressing, and has demolished my confidence in this car. The (un)reliability of this car is beyond belief.

How do I know on next reading in another few tens of files it won't drop down to negative 1L ?

I was thinking the consumption and oil level drop will be linear with miles.

I've experienced the same and even thought my brand new oil level sensor was playing tricks on me that at one point I was having doubts with the reading. Just recently, mine was at 1.0 then all of a sudden dropped to +1 quart at 750 - 800miles since last top off. Could be that I rev high a lot and also maybe cuz Im running Redline 5W50. Car runs great even after I had a misfire scare with burnt out #2 and #10 plug. Gonna go back to Castrol 10w60 and see what happens.

 

[Ishi]

Update on this:
After PCV Replacement, i drove the car for 900 miles, with level at +1.1L on the dash.
After 900 miles, it drops to +1.0L.
In another 26 miles, it drops to +0.9L. I keep driving it, and it was at +0.8L for a while, for nearly 450 miles.
SO, i have covered about 1350 miles now with a 0.3L consumption of oil, apparently.
Yesterday, it recomputed again while driving and the level drops to +0.2L !!! What the Heck. Straight from 0.8 to 0.2. This is very disappointing, depressing, and has demolished my confidence in this car. The (un)reliability of this car is beyond belief.

How do I know on next reading in another few tens of files it won't drop down to negative 1L ?

I was thinking the consumption and oil level drop will be linear with miles.

Sounds normal to me. The oil consumption reading is non-linear in these cars. Also seem to get lower consumption with fresh oil in car.

Takes a good few hundred miles for my car to show any consumption from full mark. Once it hits 0.7 or so it drops more rapidly.

Also you must reset oil level indicator whenever you add oil as I think the car averages the consumption over distance.

 

[sunilshivaram]

Once it hits 0.7 or so it drops more rapidly.

This non linear oil consumption sounds very strange under the same driving conditions. Does it mean there is something else in play here, more "sloshing" when oil level reduces that causes oil getting sucked out when PCV valves are open, or some weird pressure difference that causes more blow by gases accumulating in the crankcase ?

What happens if keep adding 0.3Quart oil when it drops to 0.7L, like keep topping it off ? I can try that and report back. This will be couple of weeks though lol.

BTW, my car is super clean now, no check engine light, nothing for a long while. Statistically, it means something bad is going to happen anytime now.

 

[Ishi]

This non linear oil consumption sounds very strange under the same driving conditions. Does it mean there is something else in play here, more "sloshing" when oil level reduces that causes oil getting sucked out when PCV valves are open, or some weird pressure difference that causes more blow by gases accumulating in the crankcase ?

What happens if keep adding 0.3Quart oil when it drops to 0.7L, like keep topping it off ? I can try that and report back. This will be couple of weeks though lol.

BTW, my car is super clean now, no check engine light, nothing for a long while. Statistically, it means something bad is going to happen anytime now.

Does it mean something else is at play? Nope I don't think so. No idea why it was designed like this but I think it's normal behaviour.

Adding 0.3l at a time won't help; I believe the car will only register 0.5l added at a time. Never tried this.

Your consumption seems normal to me and I doubt very much that it is an indicator of future trouble.

If your car is running strong, enjoy it. We tend to be a bit ocd about these cars lol.

 

[sunilshivaram]

Adding 0.3l at a time won't help; I believe the car will only register 0.5l added at a time. Never tried this.

I think i tried adding 0.2L and the car picked it up. You have to do a quick measure after making any changes to oil level. It showed 0.2L from its regular compute, i pulled it over and did a quick measure, and it came back as 0.2L. I will add 0.2L and see what it says now. We have nothing to lose except the car. Just go buy another cheap car lol.

 

[specialized2010]

I have been doing Redline 5W50 and topping off with Motul 10w60. Upper pcv valves replaced with no difference. Seems to be pretty consistent consumption for me, top off every 1k miles while driving miss daisy and 750 - 800ish when driving hard - absolutely no smoke in the tail pipes, no oil leaks (slow power steering leak doesnt count), good readings on the leakdown test I did while the engine was warm. When mine hit +1 quart recently I put in about 3/4 and it picked it up as 1 quart. I hit 1.1-1.2ish one time. Im just gonna do what it asks and make sure I have a quart or two in the trunk.

 

[sundaycruzers]

Most oil consumption with bmw motors can be related to vacuum. The s85-65 consume some oil dew to high rev’s and cylinder distortion. Most likely is a more common problem that all bmw’s will have at some point, which is vacuum leaks. IE valve cover gaskets, intake leaks rear-front main leaks, bad oil cap and I’m sure there’s more. Some of these problems will not leave oil externally or have any relationship with oiling system itself, but will cause an increase in oil consumption. Just my opinion.

 

[sunilshivaram]

If your car is running strong, enjoy it. We tend to be a bit ocd about these cars lol.

I spoke too soon ! My Left License plate lamp is out now :|

 

[sunilshivaram]

QUICK MEASUREMENT of oil level :
My oil level was at 0.2L, i added approximately 0.2L to it, and did a quick measurement again when engine was hot, and on level ground. The quick measurement came back with same 0.2L reading after about 60 seconds. So, its not precise.

 

[platii]

The minimum quantity for the oil measurement system to update the oil level is 0.5L, anything less than that won't be reflected. So it is recommended to add top off with 0.5L every time.

 

[flacoramos]

If you had inpa you'd see the sensor reading live, which will pick up the 0.2L or whatever is going on. What the dash displays however is a dumbed down heavily filtered version of the sensor reading. The dash logic updates only when driven on the highway for 20 or 30 miles. Been discussed more than once in the past.

 

[Emfiver]

I’ve also had the non linear consumption. Stays on 1 or 1.1 for a long while. Then 0.9, 0.8 and then from there it can do down fast.

For some reason it seems to go down faster on long freeway type drives which is the opposite of what I’d expect.

I’ve given up trying to figure it out too. I just add 1l when it gets to 0.1 or 0.2.

 

[googone20]

Hey guys, I just got done replacing my 2 valve cover PVC valves. Has anyone done these on the E63 M6 platform? I got to admit, I don't see any way my hand or tools are going to work on those 2 back valves along the firewall!! It is spaghetti back there and I can't even see them.

 

[sunilshivaram]

Hey guys, I just got done replacing my 2 valve cover PVC valves. Has anyone done these on the E63 M6 platform? I got to admit, I don't see any way my hand or tools are going to work on those 2 back valves along the firewall!! It is spaghetti back there and I can't even see them.

They exist out there, i saw them while changing my exhaust headers. There was no way i could get into any position to get to them. Its impossible to get to them from below. You have to go from the top, get line of sight on the bolts holding them, loosen the bolts, and yank the lines out using the metallic hoses. That is my understanding, and I haven't tried it.
By changing the two at the sides, my oil consumption went down, and there is no more oil after 1000s of miles now at the hoses to the intake.

 

[sunilshivaram]

The uneven oil usage continues !
Oil level was at +0.8L.
I drove 850 miles, and it went to +0.7L.
In the next 200 miles, it went from +0.7L to +0.2L, dropping by 0.1 every 50 miles and every time i get into the car :|

I guess my next experiment is to add 0.5L once it hits the +0.5L mark. Keep it always near +1.0L and see how many miles i can get.

This is very disturbing.