![]() ![]() ![]() ![]() While I haven’t actually read this anywhere, it seems BMW had planned this engine for later vehicles (the e36 chassis), but decided to go ahead and throw it in the e30 and introduce the 318is starting in 1989. Enter the M42, a 4-cylinder DOHC 16 valve engine. In 1989, BMW seemed to realize the 318 could be a lot more fun with a little added excitement under the hood. If you want a full history and description of every BMW engine variant, wikipedia has a surprisingly rich amount of info on the topic). Being a 4-cylinder, SOHC engine, the M40 was very similar in output to the M10, so not a very exciting change other than being a more “modern” engine with features such as hydraulic tappets (I’m simplifying this history quite a bit, but you get the point. In 1988, BMW replaced the M10 with the M40. Having been in production since 1962, the wonderfully designed M10 was clearly showing its age. Anyhow, the 318i was originally based around the venerable M10 4-cylinder engine. This is the last year BMW used the e30 body style for the US 3 series before switching to the e36 in 1992 (I think there may be an exception for the convertible which stayed e30 into 1992, but whatever). This car is surprisingly hard to find consistent documentation on regarding repair procedures for, as it is a bit of a Frankenstein. However, when I was searching for similar guides online when I had to perform this procedure, I found very little information so figured I should contribute what I have since learned to the grand how-to database that is the Internet.Īs the title suggests, I recently had to replace the upper oil pan on daily driver, a 1991 BMW 318is. If that’s all you’re here for then carry on. WARNING: This post has nothing to do with audio. ![]()
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