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BMW 3-Series (E90 E92) Forum
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Oil Thermostat Leak?
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02-15-2014, 02:41 PM | #1 |
First Lieutenant
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Oil Thermostat Leak?
Is this an oil thermostat leak in my picture? Also, is there a screw missing in the part I circle in red in the picture? Does anyone know how much it'll cost to fix? I'm out of warranty. Prior to this I was losing 1 quarts of oil every 5 thousand miles. Now I'm losing 1 quarts about 3 thousand miles.
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02-15-2014, 04:06 PM | #2 |
Captain
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Standard Maintenance
OK -- you have a 335i without an oil cooler. An yes you have an oil filter housing gasket leak. The high heat of these N54 engines harden all the gaskets. Plus i think that as for the oil filter housing gasket -- that the coolant (which flows through the housing) must become acidic and further break down this seal. Do a little research -- easy job on a 328i but on a 335i you do have to slightly pull back the intake to get acess to one of the bolts. Some may have a small nifty tool -- but i had to remove the intake. Which gives you a chance to seem the infamous intake / valve gunk. You can just pull the intake back a little without pulling the whole thing off. However, if you have this leak -- I would suggest:
Oil filter hsn gasket Valve cover gasket Thermostat and WP -- you have to drain the coolant anyway Any oil on the belts -- change serp / idlers / tensioner . . All common issues that WILL happen to all N52 engines near 100k or less. Enjoy! |
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02-18-2014, 01:34 AM | #5 | |
Colonel
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Quote:
No more than 4 hr labour charge. Honestly, a shop should charge 3 total. The OFH gasket is 20. And a gallon of BMW anti-freeze. Oil and filter is what ever you currently pay. Don't go to the dealer Outside these prices. Just my 2cents. DN |
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02-18-2014, 07:42 PM | #6 |
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In some threads Indy shops have charged as low as $250. Dealer is $500+. The job is easier on your car due to no oil cooler, which should help just a bit cost wise.
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2007 E92 335i MT
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02-28-2014, 02:30 PM | #7 |
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