N62 valve guide seal failure (poll)
 

I'd like to inquire:

How many miles on your N62 engine?

Have the valve guide seals bean replaced?

If yes, what was the mileage at time of replacement?

Very interested to know how many N62 engines have made it to old age without replacing the valve guide seals.

Thx!

110K miles on mine
I have not had the valve guides replaced.

+1

I think ~107K on mine. 2004. No seal replacement.

2005

144k miles

No seal failure, no smoking

136k on my 04. No smoke with everyday driving, but will smoke some if idling 10 min or more. Im not worried about it until A. It gets to the point where it smokes on regular drives or B. I find a good indy in N.Jersey who has AGA tool and is priced accordingly, considering the time saved using the tool.


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105K total miles. 2004 4.4 engine.
I bought it at 85K knowing I would need to do this.
Talked seller down 2500 dollars.

It would puff smoke if extended idle.
Engine did not burn any oil.


Indy did mine a few thousand ago.
No smoke, runs great.
Old seals were hard and not sealing.

109K miles no seal replacement.... smokes like a freight train if I park it more than 3 days.... burns 1 quart of oil every 200 miles if I travel at 90+mph.....got pulled over for a smoke show after it was parked for 2 weeks and gunned it going up an onramp about 3-5 minutes from my house... it passed inspection about 2 weeks before that so I told him I must have gotten some bad fuel... lol

Good job!
Keeps those mosquitoes away.

Not old but.....Almost 99k miles now.....and no smoking issue.

Recommend to change engine oil/filter often and clean CCV/hoses with Compressed air.....or replace if necessary.

And don't forget............. drive it HARD every now and then!

98k miles.
Doubt anything has been done valve wise.
No smoke.

I'm the original owner, an 05 and had the seals completed about 2/3 years ago. Truck now has 87k. Back then, maybe 75k.

Purchased 08 750Li with N62TU engine at 79k miles (back in oct 2016), and had to do the smoke/emission test and it failed at visual idle. Replaced all valve stem seals (99500 miles) and car passed smoke/emission test with no problem.

I’m at 162k now, still no issues.

120K now still good. BUT I think whoever had the X5 before I, did repair it. Because it has silicone around the valve covers seals.

207,000km still running strong

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05 4.8is (12/04 build) with 118k and smoking on extended idle only.

Just got it couple months ago and had the issue before I bought the car so who knows how long is been like this. Previous owner had no clue it did or not.

Getting mine done by an Indy this Friday.


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Suggest that you check the PCV first since it's cheap to do and most of the time peoples issues with smoking is not the valve guides.

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178,000

Valve seals haven't been done.

Smoke on extended idle. Like 10min operating temp

Did PCV with no change.

Usually change oil between 5-7K, haven't had the check oil light

^I'm at the same status as jabstick420.

Been smoking on extended idle since I bought it @ 90,000 miles. I did both CCV diaphragms with no change. It now needs valve covers so I'll be doing the VSS at the same time.

I switched 10w50 (I think) oil and use some Lucas treatment with each oil change it DRAMATICALLY improves the issue. Almost no oil consumption and very difficult to get it to smoke. After the VSS and all gaskets I will switch back to OE recommended viscosity and stop using the Lucas.

Currently at 122,000 miles.

Same status as Crystalworks. 128k miles and been changing oil every 5k miles. Using lucas additive and heavy oil but still smokes on extended idle (+10 minutes). Changed valve covers gaskets and all other gaskets (timing, vauum pump gaskets oil deep stick, oil cap etc) twice, refusing to believe it's the valve stem seals - I believed (hoped) it was vacuum leaks. What a waste of time, money and energy. Changing valve covers gaskets is a tough job.

As we speak I'm doing the valve stem seals. Finished bank1 and now tackling bank2. Cylinder 5 done and now on cylinder 8. It's a grueling task being my first time doing it. Requires patience and patience and yet more patience. Not hard as such but very time consuming.

141K and no issues here. I run AT-205 in my oil changes. I only have vehicle history from 109k.

4.4 154,000
No smoke. No replacement.

Note: did smoke badly, but it was the CCV system malfunctioning. No smoke since repair.

Trust me I've tried every single cheap fix I found. After a long denial, I come to accept it's my VSS lol

Oh, ouch... but since you're doing the valve stem seals, what else are you going to do?

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My x5 is at 172k miles. Still no issues.

My new to me e60 on the other hand.. only 55k miles and noticed white smoke after extended idle. Gearing up to replace the vss on that rig

2005 4.4i with 116500 miles on the clock, VSS done at aprox 115000 +\-. Sucker smoked like a freight train after extended idle, 10 \ 15 minutes, and sent up pretty consistent smoke signals even from a few minutes of idling at a traffic light.


Got tired of being "that guy" real quick and did VSS, 1500 miles later and no smoke, I can let it idle all day and no smoke - it's such a beautiful thing!


And yes, my old ones were so hard and brittle that they chipped if I dropped them on my garage floor! Terrible design...


If you do this job make sure you order (and receive) the revised VSS! This is important because the new design removes the "pocket" where oil would build up and adds an additional "sealing" ridge.


I stress this because I specifically ordered the new design, confirmed with the Supplier that they were in fact the new design and then received new OLD stock (old design VSS) that had been on a shelf in some warehouse for who knows how long...

^ Did you do them yourself? Where did you order parts from?

Update:

I went ahead and did the seals later in 2017 when I was doing other gaskets. That would have been after the NorthEast summer road trip that year which was about 5k miles. I could look it up, but I would guess that I had about 115k when I elected to do the seals before there was a problem.

I'm at 136k now. No problems. These things love to be maintained. :thumbup:

Yes, I did mine myself and ordered everything from FCPEuro. I really like their lifetime warranty on everything - not that I’ll ever be doing this job again [emoji50]


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^ i will be ordering from FCP as well. what brand did you go with? how did you know it was the old design?

There are a bunch of good posts out there, X5Only did one as well as a handful of others. Having just gone through this, here's pretty much what you need to get your X back together:




https://xoutpost.com/bmw-sav-forums/...000-miles.html

Valve Stem Seal Replacement WITHOUT Upper Timing Covers:

Valve Stem Seal Kit - 1134029751 (x2)
Valve Cover Gasket Left - 11127513195 (x1)
Valve Cover Gasket Right - 11127513194 (x1)
Cam Position Sensor O-Ring – 12141748398 (x4)
Eccentric Shaft Sensor Gasket – 11127518420 (x2)
Valvetronic Actuator Seal O-Ring - 07119903596 (x2) (This is the small o-ring between the actuator and the actuator mount)
The valvetronic actuator mount gasket (actuator mount to valve cover) comes with the valve cover gasket set and is the “fat” o-ring style gasket in that kit.)
Some RTV Red or other good gasket maker.

NOTE: - When installing the valve cover gasket put a few small dabs of gasket maker into the gasket channel on the vc and set the gasket in place, let it dry for maybe 20 minutes or so until the gasket maker holds the gasket in place – it makes it so much easier to get the vcre-installed when you know the gasket is (probably) going to stay in place.


Valve Stem Seals WITH Upper Timing Covers:

Upper Timing Cover Gasket Right – 11147506424 (x1)
Upper Timing Cover Gasket Left – 11147506425 (x1)
Vanos Solenoid O-Ring (Large) – 11367513222 (x4)
Vanos Solenoid O-Ring (Small) – 11367546379 (x4)

If you just want to make some extra room for yourself while you’re working in the area:

Throttle Body O-Ring – 13547510433 (x1)
(Removing the tb just makes access to the harness and everything that much easier.)

NOTE: - When doing the timing covers you will notice a small gasket lip extending above the level of the timing cover and head – BEFORE installing the valve cover gasket, use a razor blade and cut that excess gasket material off level with the timing cover and head. I also used a small amount of RTV Red on this area just to reassure myself..