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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 01-26-2017, 12:59 PM   #21
Mango
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You may be able to mitigate oil loss on some old BMWs, but truth is, at some point, these old BMWs are just going to need new ring jobs. Plain and simple. Everyone wants to believe there's a magic quick fix. but there's not. These engines are just fvcking old and worn. You want new car characteristics, you'll have to make your car brand new OR get a new car. Stuff wears out.

Money money money.

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Old 01-26-2017, 03:39 PM   #22
das_autobahn
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Originally Posted by mango View Post
you may be able to mitigate oil loss on some old bmws, but truth is, at some point, these old bmws are just going to need new ring jobs. Plain and simple. Everyone wants to believe there's a magic quick fix. But there's not. These engines are just fvcking old and worn. You want new car characteristics, you'll have to make your car brand new or get a new car. Stuff wears out.

Money money money.


ie: Replace everything mango fashion
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Old 01-26-2017, 06:11 PM   #23
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ie: Replace everything mango fashion
Yes. You are unintentionally right.

At this point a ring job is likely to turn into a full blown engine rebuild. One example is 50sKid's findings after engine teardown. Initially he was planning a head gasket / piston rings / rod bearing job.
Just watched one of his most recent videos on blueprinting his engine block. He found that most of the cylinders have significant out-of-round and taper wear, so no simple cylinder wall honing and engine reassembly. He'll need cylinder boring machine job and a set of oversized pistons.

This is just motivating me to do leak down testing more often and get ready for a full engine rebuild at first sings of compression ring and/or cylinder wall wear.

Of course, people who just want to get another year or so out of their aged E46 may consider alternatives cheaper than restoring the engine back to factory specs.
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Old 01-26-2017, 06:50 PM   #24
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Yes. He found that most of the cylinders have significant out-of-round and taper wear, so no simple cylinder wall honing and engine reassembly.
Interesting... wonder if this is due to the cast iron inserts not being very durable or the way in which they are manufactured (pressed in?)
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Old 01-26-2017, 07:47 PM   #25
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I am surprised from those consumption rate you reported OP!!
Almost feeling spoiled that @ close to 140,000 I am down MAYBE 1/4th of a quart in 3,500miles on my B30.

There's got to be some variable here which you can compare again a non-burning car, which is affecting the consumption ; Have you smelled the exhaust lately for oily smell when you step on it, or trailed your car with a camera lately?
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