Question about 1997 BMW 318
While driving the check oil warning light came on followed by low oil pressure shut off engine warning and loud tappet / timing chain noise. Immediately pulled over and shut off engine. let it sit a min or 2 and checked oil dipstick which showed oil to be too full (up to top of dipstick. The oil and filter were changed 2 weeks ago so i doubt its a clogged filter and the cap seems tight on filter housing. Some 1 said that the 540i has been known to have oil-pump bolts work their way loose which would explain loss of pressure and the hydraulic timing-chain tensioners rattling away... any experienced advice would be great thanks.
From the book the oil pump is driven by a chain from the crankshaft. It is very possible that the oil pump has come loose and thrown/broken the pump chain. It will require a sump removal to check it out. recheck the oil level as what you read may have been a froth level . there is no reason for extra oil unless it was overfilled to start with or there is water contamination ( white /grey oil)
Posted on Nov 12, 2014
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Posted on Jan 02, 2017
SOURCE: High oil Consumption, BMW M5
Look for Castrol TWS 10W60 Motor Oil. This car should not burn so much oil, you need to use a different kind. It is recommended by BMW as well. I also heard the VANOS isnt an issue anymore, can be fixed with a different MAFF. Good luck!
Posted on Jan 18, 2009
The water (coolant) in the expansion tank will rise and fall with the engine temperature. What the expansion tank does is collect and return coolant to and from the engine. When the engine warms up the coolant gets hot, builds up pressure and opens up the radiator cap. The coolant then goes into the expansion tank. Now when the engine cools down the pressure drops in the cooling system and the pressure drop (vacuum) pulls the coolant back into the engine via the radiator cap. The radiator cap allows the cooling system to build up pressure and by doing so increases the boiling point of the coolant, but when that pressure exceeds the caps rating the cap opens and the coolant goes to the expansion valve. The cap has another part to it that when the engine cools down and a partial vacuum is created in the cooling system a "valve" in the radiator cap opens and allows the coolant to be drawn back into the engine. I would look at your radiator cap to see if any gunk or build up is on it, and check the rubber gaskets for cracks. It's easiest just to replace the cap because they are inexpensive and easy to replace (2-10 dollars). The expansion tank should have two hoses on it. The one on the bottom comes from the radiator and the one on the top (possibly part of filler cap) runs down and is open to the ground. That way if it is overfilled or becomes overfilled it will slowly leak onto the ground. When and if you change your radiator cap, make sure the engine is cooled down, remove cap and start engine and turn heater to full blast, full heat. Leave the cap off and let it run until engine warmed up. This should burp out any air pockets that may have happened when coolant was changed. Also top off the coolant in the radiator while it is running. Hope this helps and good luck
Posted on Apr 03, 2009
hey man, i had the same problem with my 325i (clankins sound on cold start-up) i took it to the dealership to have a look they diagnosed it wrong telling me a pulley is cracked and quoted me a ridiculous amount to fix it so, i decided to have a look 4 myself and i found that a pulley was loose the pulley looks similar to that of a cog of a bike it has 1 bolt in the center, that bolt was loose so all i did was tighten it and it solved the clanking sound , give it a shot it might work for you.
Posted on Apr 06, 2009
i have had the same problem at times. my car would start and then shut off. but i found that i needed oil and check my oil and it was a quater low put in some oil and everything went fine i notices that everytime the oil is low the same thing happens also depending on the position of the car being park meaning that if you are in a down hill position or up hill position i will do the same. so you have to accelarate for 1 minute to have the oil go up. i hope this works
Posted on Jun 18, 2009
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