Timing chain guides

neilrmp · #1 12-01-2014, 06:11 PM

Hey guys, today I heard a ticking then it became a knocking sound coming the front of my engine, I changed the timing chain tensioner but the sound is still there, I am going to pull my oil pan to see if there are any plastic pieces in there, I am almost sure it is the timing chain guides, anyone had this issue before?, can I check more before pulling the front of my engine to do the repairs.

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Davidf · #2 12-03-2014, 11:45 AM

Checking pan and/or oil filter for debris is a good indication of guide failure. What engine are you talking about? When the guides failed on the V8 in my 740iL, it made a horrible racket that was unmistakable for what it was. Definitely more than a "knock". The chain hitting/rub on side of front timing cover left evidence of shiny aluminum in filter housing. I6 may behave differently.

neilrmp · #3 12-03-2014, 11:49 AM

Quote:

Originally Posted by Davidf

Checking pan and/or oil filter for debris is a good indication of guide failure. What engine are you talking about? When the guides failed on the V8 in my 740iL, it made a horrible racket that was unmistakable for what it was. Definitely more than a "knock". The chain hitting/rub on side of front timing cover left evidence of shiny aluminum in filter housing. I6 may behave differently.

It's the X5 N62TU 4.8i, I am finishing putting up my lift so I will check the oil pan for broken pieces, the issue now started, I could hear the knocking on the right side only, but I want to repair it before it gets worst

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neilrmp · #4 12-03-2014, 12:42 PM

Quote:

Originally Posted by neilrmp

It's the X5 N62TU 4.8i, I am finishing putting up my lift so I will check the oil pan for broken pieces, the issue now started, I could hear the knocking on the right side only, but I want to repair it before it gets worst

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I am preparing for the worst, I purchased the timing tool and all the gaskets along with the six (6) timing chain guides, I saw some videos on youtube on the M62 which will help a little, I also want to check the rest of the engine as I would have acess and repair as needed.

Davidf · #5 12-03-2014, 12:57 PM

I was able to replace the guides without the use of the timing tool. It has been awhile, but I vaguely remember marking the cams, etc. very precisely to ensure everything was positioned properly upon reassembly. 60k miles later, no problems. My engine is NOT a "TU"

neilrmp · #6 12-03-2014, 01:06 PM

Quote:

Originally Posted by Davidf

I was able to replace the guides without the use of the timing tool. It has been awhile, but I vaguely remember marking the cams, etc. very precisely to ensure everything was positioned properly upon reassembly. 60k miles later, no problems. My engine is NOT a "TU"

Thank you for the info, I may try that approach also, because the tool only do one side at a time I think, how did you mark the main sprocket, did you lock the crankshaft?

Davidf · #7 12-03-2014, 01:16 PM

I marked sprockets and cam with punch marks, etc (many different places including cam to bearing caps, ....). I did indeed lock the crank with the official BMW pin designed for the task. IIRC, the pin is used at the rear of the block and locks the flywheel/ring gear from turning.

Also, if you understand what the timing tool is accomplishing, you can eyeball the cam position by ensuring the flats on the cam (that the tool would engage) are perpendicular to the plane of the head, or parallel to the bearing caps, or... You get the idea hopefully. Plan on replacing the baffle/silencer on the left side of engine as it will be brittle and break when you touch/remove it. I forget its proper name and not 100% sure it is installed on the "TU" engine.

neilrmp · #8 12-03-2014, 01:26 PM

Quote:

Originally Posted by Davidf

I marked sprockets and cam with punch marks, etc (many different places including cam to bearing caps, ....). I did indeed lock the crank with the official BMW pin designed for the task. IIRC, the pin is used at the rear of the block and locks the flywheel/ring gear from turning.

Also, if you understand what the timing tool is accomplishing, you can eyeball the cam position by ensuring the flats on the cam (that the tool would engage) are perpendicular to the plane of the head, or parallel to the bearing caps, or... You get the idea hopefully. Plan on replacing the baffle/silencer on the left side of engine as it will be brittle and break when you touch/remove it. I forget its proper name and not 100% sure it is installed on the "TU" engine.

Thank you, I am not sure what the baffle/silencer thing is but I will do some more research, I have a pretty good understanding about the timing and the procedure but try to get all the info so everything goes smothers, although it never does.. thanks again.