[Yozh]

Originally Posted by Chief Orman

what if you have a shop do it?

Only if they have done it before. It’s a whole day job if you do yourself. Shops may do it in 4-5 hrs. But also depends what else are they doing, like vac lines.

[PerfectAce]

Great vids, sunny and Yozh! Thanks for doing these. Got a couple of questions though: 1) How does one check for timing chain stretch? 2) And sorry if this has been answered elsewhere, but what's the fuel bleeding procedure after opening the high pressure plumbing? Or is there one? As I understand it, running the lift pump will only bleed the low pressure supply line up to the HPFP. So should we just cycle the lift pump to ensure no air in the low pressure line, crank the engine (and keep cranking) letting the HPFP do it's thing knowing that eventually it'll push fuel to all of the injectors?

[Yozh]

The best way to bleed is to bleed through ISTA as it will bleed the rail as well. However, even with proper bleeding procedure you will crank 2-3 good long ones before it fires up.

[Yozh]

On the timing chain stretch, the best way is to open it up. But that’s not feasible for most. May as well change it at that point. What you can do if you are changing the VCG is to open the service port for the hydraulic chain tensioner. Compress it a few times from above either by turning the camshaft counterclockwise or inserting a long screwdriver and pushing on the chain and consequently on the runner that is being pushed by the tensioner. That will drain it of oil and you can lock it through the service port. But you need the locking pins. They usually come with a new tensioner. Once locked, you can look at the chain slack.

[Mik325tds]

Yozh and sunny_j.
1. Where best to purchase the tool to loosen the fuel rail lines?
2. What is the best way to measure stretch on the chain? What is the limit before needing change?
3. Did we ever establish that we could derive chain stretch from valve timing in testo?

[Yozh]

Michael,
1. Get any 17mm injector socket. The one we used was fairly inexpensive off Amazon.
2. Chain stretch can be done approximately if you release the tensioner. Need the pins from the new one though. I wish there would be an examination window to look at the tensioner and see how much it is extended. I have not tried removing its cover and look visually see if you can see how much is it extended.
3. PM me and I will send you a TestO parameter and see what value you get. It’s a relationship between the camshaft and crankshaft. Be curious what you think of it as well. No one has done any objective study to confirm if a stretched chain would provide for a large discrepancy. But my and Sunny’s value was very small and we have checked timing when doing VCG and it was spot on. Another way to check chain stretch. If your timing is out, could be due to chain stretch.

[Mik325tds]

Originally Posted by Yozh

Michael,
1. Get any 17mm injector socket. The one we used was fairly inexpensive off Amazon.
2. Chain stretch can be done approximately if you release the tensioner. Need the pins from the new one though. I wish there would be an examination window to look at the tensioner and see how much it is extended. I have not tried removing its cover and look visually see if you can see how much is it extended.
3. PM me and I will send you a TestO parameter and see what value you get. It’s a relationship between the camshaft and crankshaft. Be curious what you think of it as well. No one has done any objective study to confirm if a stretched chain would provide for a large discrepancy. But my and Sunny’s value was very small and we have checked timing when doing VCG and it was spot on. Another way to check chain stretch. If your timing is out, could be due to chain stretch.

Thanks Yozh. I'll take a look when I replace my VCG next month. I was wondering if the chain itself could be measured with a gauge like measure distance between ten chain links from pin to pin. Is there a listed suggested replacement length?

[Mik325tds]

I just started a research thread: Query: CAM Timing - indication for chain stretch?
Can you please post your CAM Timing here:
https://www.e90post.com/forums/showt...8#post25809208

[ddinse]

Originally Posted by ddinse

I would say 100k unless you see signs of failure. My 2011 35d has 145k with no issues. I should probably do that one soon.... not sure the VCG was the issue with the 335d. It is still smoking and saw a small puddle of oil again. I will pull the covers soon and see if it's leaking around turbos or still the rear main. Waiting for Yohz to post a vid of a complete overhaul...

Pulled my undersized catch can set up off and went back to stock and this has resolved my smoke issue

[X5ddd]

great video thanks

I'm in the process of doing this, however, I'm a little surprized when injectors were pulled they all have double washers.. anyone knows why ? no one has worked on the car (we've had it since 25k miles)

confused..

[X5ddd]

Hey guys, am I screwed ? Dropped return line cap into the intake and it won’t come out with the shopvac
I was done with valve cover gasket and was putting everything back together..



I’ll attach pics

[TheBigSwede]

Great job on the videos guys! Highly informative and much appreciated.

[ddinse]

Originally Posted by X5ddd

Hey guys, am I screwed ? Dropped return line cap into the intake and it won't come out with the shopvac
I was done with valve cover gasket and was putting everything back together..

ki

I'll attach pics

Go see your proctologist, he has the tools you need... just kidding. Try a piece of hose with some tape on the end. Just don't lose the tape

[ddinse]

You might need one of these

[X5ddd]

Originally Posted by ddinse

You might need one of these

the piece is bigger than injector hole..

[ddinse]

Can you fish it out of the intake hole?

[apexit4]

Originally Posted by Mik325tds

Yozh and sunny_j.
1. Where best to purchase the tool to loosen the fuel rail lines?
2. What is the best way to measure stretch on the chain? What is the limit before needing change?
3. Did we ever establish that we could derive chain stretch from valve timing in testo?

BMW has a special tool they use for removing each of the fuel rail lines that go to each injector, part number 83300491277. If you google the number, you'll find quite a few vendors that sell it.

It's a little expensive for what is essentially a glorified wrench but its contoured perfectly to make removal a breeze (the spacing between some of the nuts and the valve cover is quite small). Well worth the $40 or so that I paid for mine.

[Mik325tds]

After removing the heat shield of the small turbo, I noticed that the turbo gasket is oily black. What is the expert opinion here? Replace? How much trouble am I getting myself into?