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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Money Shifted :( How screwed am I?



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      02-04-2020, 03:07 PM   #23
omadab
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leakdown test is really the go-to test to see if your valves are sealing properly.

IM GUESSING that the process to check your timing is to put the flywheel at TDC (there's probably a mark on the flywheel you look at through a peep-hole in the transmission bellhousing)

Then once the flywheel is at TDC on the correct stroke, you check to make sure that the cams are in the correct position, I'm pretty sure there are flats on the cam somewhere that are supposed to be perpendicular to the valve cover deck when the crank is at TDC.

VANOS complicates things, I don't know how the vanos adjustment modules on the front of each camshaft factor into the equation. I'm guessing that the vanos modules are installed and toqued down at the "full retard" position, then oil pressure advances the valve timing from there.

I've never done this on the N52, i'm just taking educated guesses based on timing ive done on other engines so i could very well be wrong.

My best guess is that since your engine still runs and there doesnt look like there is piston-valve contact, your timing probably just shifted a little bit and needs to be reset. Figuring out how or where it slipped is probably impossible so just redoing the entire timing process is probably your best bet. Basically if youve never done it before, to summarize the process in 1 sentence, you just have to position the crank and both cams at the proper position relative to each other, then lock it down in that position with the various bolts that secure the timing chain sprockets.

You could buy a timing chain if you felt like it for peace of mind, I'm not so sure its damaged though. I'm not sure what the factor of safety on a timing chain is, lol. So I'm not sure if theyre easily damaged by a sudden change in engine RPM.
I've looked up how to do the timing. Seems very simple. 150$ kit. But my dad doesn't trust me to do it myself XD so I'll have to find a mechanic that is willing to come over and do it 😂😂

I'll be changing the eccentric shaft sensor also. I broke the clips on it anyway haha
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      02-04-2020, 03:10 PM   #24
omadab
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Originally Posted by CTinline-six View Post
I would check that all the timing marks line up, that will tell you if there is an issue a long with the leak down test. Is the car throwing any codes?
I have 2 permanent codes P054B and P13B4. It's for the exhaust camshaft and crankshaft. So timing is most likely off
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      02-04-2020, 05:43 PM   #25
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given the lack of marks on the piston tops, id be pretty optimistic that you valves are OK and your timing just slipped. Obviously no guarantee, but remember what my pistons looked like...

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      02-04-2020, 07:12 PM   #26
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You may have gotten lucky and the engine just jumped time but didn't damage anything. The $150 is worth it to re-time the engine and do the leak down test.
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      02-08-2020, 04:46 PM   #27
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Hey guys. I bought the timing kit and tried to lign it up with the camshaft but it doesn't not fit so the timing is for sure off. Now I need to insert a pin into the flywheel at top dead center to hold it in place while I adjust the vanos and camshafts. The problem is that the pin is not going in. I decided to put my borescope into the hole with the pin to have a look at when the pin should be inserted but even though I turn the entire engine over multiple cycles, I can not seem to see a hole big enough in the flywheel for the flywheel timing pin to enter. Either I'm doing something wrong or the flywheel could be aftermarket from a previous owner? If I simply stick a screwdriver in, there will be a little bit of play in the flywheel. Could that cause bad timing or is this little play not a big deal?
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      02-13-2020, 11:16 PM   #28
omadab
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Hello. So as much as I try, I can't get the fly wheel timing pin in. I got an allen key that is basically the same size and it fit without a problem. This leads me to conclude I probably have the wrong key. All my online research tells me that I have the right one tho. Here is a picture of the timing pin. As seen on the markings of the pin, it only goes in about 0.5 cms. Any ideas? Thanks
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      02-13-2020, 11:17 PM   #29
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here it is
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      02-14-2020, 03:18 AM   #30
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Pretty sure it should have a reduced tip on it to actually engage with the flywheel - around 6mm/0.25" diameter, from memory. Could be wrong though!
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      02-14-2020, 03:06 PM   #31
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Pretty sure it should have a reduced tip on it to actually engage with the flywheel - around 6mm/0.25" diameter, from memory. Could be wrong though!
Yes. Searching on google shows me a different tool necessary. But the online sites say that this tool would not fit my engine. :/ (n52)
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      02-14-2020, 06:36 PM   #32
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It's not rocket science; the tool you have doesn't fit, so you need one which will. All it does is align a point on the flywheel with the hole in the block; there's nothing special about it.
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      02-15-2020, 11:32 AM   #33
omadab
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It's not rocket science; the tool you have doesn't fit, so you need one which will. All it does is align a point on the flywheel with the hole in the block; there's nothing special about it.
I agree. My only worry is the little bit of play in the flywheel that a smaller tool will cause. Is this enough to screw up timing. I guess I have no choice but to try and see
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      02-15-2020, 01:18 PM   #34
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Try and see. A tool with some play is better than a tool which doesn't fit.

Edit: When I say 'try and see', I mean try the different tool, see how much play there is, and make a call as to whether that is likely to cause issues.
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