Mine does the same thing, only on cold starts, goes away after a few minutes, I suppose after the oil pressure finally engages the sticking tensioner. It's a constant tapping noise which is rev-dependent. Time to get a new tensioner...
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Mike's Alpine White 1991 318is
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The rattle can also be caused by the 6 sump bolts that are common to come loose. If you haven't dropped your lower oil pan to check, I suggest you do that. Use blue loctite on the 6 bolts and re-tighten. Highlighted in blue. Pink is the dip stick.
'91 318i (Alpine) - daily
'88 325ix (Zinno) - drive here and there!
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Originally posted by c0rbin9 View PostMine does the same thing, only on cold starts, goes away after a few minutes, I suppose after the oil pressure finally engages the sticking tensioner. It's a constant tapping noise which is rev-dependent. Time to get a new tensioner...
Originally posted by fresh_TD View PostThe rattle can also be caused by the 6 sump bolts that are common to come loose. If you haven't dropped your lower oil pan to check, I suggest you do that. Use blue loctite on the 6 bolts and re-tighten. Highlighted in blue. Pink is the dip stick.
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Timing Chain Tensioner Part Deux
The timing tensioner arrived today. It was a quick and easy installation. I believe the tensioner I pulled from the car was the original. It was the original style at least, not the updated M44 version.
Here's the old and new together:
And here's the timing tensioner cap threading back in. Torqued to 40nm:
I installed the tensioner compressed per BMW's recommendation and the recommendation of others on this forum. The new tensioner actually came with instructions stating I should start the engine and rev to 3,500 rpm for *at least* 20 seconds.
When I started the engine I heard the same rattle that lead me to replacing the tensioner. After the revs climbed to 3,500 the rattle went away. After 30 seconds I let the car idle and heard the rattle again. I rev'd to 3,500 again for another 20 seconds and the rattle went away. I took a quick trip up and down the street. Idle is fine and everything it operating normally. The rattle has not returned.
The true test will be when I start the car cold again. Probably when I head out to Katie's Cars and Coffee tomorrow morning. Fingers crossed the rattle is gone on cold start!
Update: No rattles upon starting the car cold the following morning. The issue was resolved with a new tensioner. The engine is quieter and smoother throughout the entire rpm range.Last edited by mike.bmw; 02-19-2017, 04:09 AM.
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Originally posted by fresh_TD View PostDepending on how cold it is, you will hear a rattle. For about a second or two. Oil needs to make it up there, remember. I'll see you at C&C. I'll be in my bronzit sedan.
Looking forward to checking out the bronzit sedan tomorrow (e30?)! This is a different car than the E32?
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Originally posted by mike.bmw View PostYeah, it has been much longer than a few seconds as of this past week. It's a few minutes of rattles until everything warms up. We'll see what happens tomorrow morning.
Looking forward to checking out the bronzit sedan tomorrow (e30?)! This is a different car than the E32?'91 318i (Alpine) - daily
'88 325ix (Zinno) - drive here and there!
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What you described is normal. I recall years ago the same instance. It just needed to build tension is all. Now if it continues you have other issues
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"The Best E30's were built with two camshafts four cylinders and sixteen valves!".
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Originally posted by fresh_TD View PostCar looks good Mike!
Here's an update for the tensioner installation. The car started up this morning with no rattling. The engine was very quiet and very smooth. Success!
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Originally posted by c0rbin9 View PostI replaced my car's chain tensioner just this morning. Weather isn't cold enough for the real test but the engine runs noticeably quieter. Definitely worth doing.
Great car Mike. This thing gets better with age.world renown Harry Potter expert
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Originally posted by phreshkid View PostWas this an easy job? Considering doing this as well.
Great car Mike. This thing gets better with age.
I installed it uncompressed to avoid unnecessary rattling on start up and had no issues.1991 318is Brillantrot daily driver (slow restoration)
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Originally posted by c0rbin9 View PostI replaced my car's chain tensioner just this morning. Weather isn't cold enough for the real test but the engine runs noticeably quieter. Definitely worth doing.
Originally posted by phreshkid View PostWas this an easy job? Considering doing this as well.
Great car Mike. This thing gets better with age.
Thanks for the compliment!
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