From digest.v7.n147 Wed Aug 20 19:07:18 1997
Date: Wed, 20 Aug 1997 18:28:36 -0400
Subject: <e36>318 Ticking Lifter solved?
Several digests ago, I posted ( a couple of times, actually) a request to
help me determine why my 1992 318is (84,000 miles) has suddenly and
sporadically started a ticking lifter noise, only at idle, only when the
engine is hot, only on very hot days, and only up until about 1400 rpm, at
which point it stops completely. Otherwisem then engine runs just fine.
Mobil 10w-30 used year round. One gentleman suggested using Risalone engine
treatment, then changing the oil. That was about it from the digest. A
post to the alt.bmw newsgroup got a detailed response from a gentleman in
the UK who suffered the same malady. He informed me that the 10w-30 oil was
probably getting a bit thin at the high temps, and that the oil was probably
leaking back down past the tappets at idle, due to the normal low oil
pressure encountered at idle/low rpm's. Combine this with the fact that we
are talking about a 5 yearold engine, and it's not too surprising to get a
bit of minor lifter noise. Anyways, as soon as I would hit the gas, the oil
pressure would pick back up, and the thinner oil would begin to circulate
more, covering the lifters fully/properly. He stated to try using the owners
manual recommended 15w-50, at least during the hot summer months and that
would probably fix the problem, at least it did in his. Well, the weather
here in the DC area is significantly cooler than it has been, and of course,
no ticking. I will probably drain a couple of quarts of the 500 mile old
10w-30 Mobil1 out this weekend, and add a couple of quarts of 15w-50 Mobil 1.
Thought the above may help some other ticking digester..
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