Oil Thermostat Leak?

DetectiveLoki · 02-15-2014, 03:41 PM

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.

123Britt · 02-15-2014, 05:06 PM

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!

123Britt · 02-15-2014, 05:07 PM

That is not a missing bolt -- I think it is an engine hoist location when the engine is installed at the factory.

DetectiveLoki · 02-18-2014, 02:20 AM

Do you guys know how much this typically cost?

DarkNemesis · 02-18-2014, 02:34 AM

Quote:

Originally Posted by DetectiveLoki

Do you guys know how much this typically cost?

At an Independent shop...
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

Jklad · 02-18-2014, 08:42 PM

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.

DetectiveLoki · 02-28-2014, 03:30 PM

Quote:

Originally Posted by Jklad

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.

A local shop quoted me $530 for 4 hours of labor. The dealer quoted me $940.

02-15-2014, 03:41 PM	#1
DetectiveLoki Second Lieutenant Drives: 2008 BMW 335i Convertible Join Date: Jan 2012 Location: Orange County - SOCAL Posts: 287 iTrader: (4)	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. Attached Images
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02-15-2014, 05:06 PM	#2
123Britt 07 X5 3.0si & 07 335i 6Mt Drives: 07 335i - SILVER Sport 6MT Join Date: May 2008 Location: Madison, Alabama Posts: 286 iTrader: (0)	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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02-15-2014, 05:07 PM	#3
123Britt 07 X5 3.0si & 07 335i 6Mt Drives: 07 335i - SILVER Sport 6MT Join Date: May 2008 Location: Madison, Alabama Posts: 286 iTrader: (0)	OH YEA That is not a missing bolt -- I think it is an engine hoist location when the engine is installed at the factory.
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02-18-2014, 02:20 AM	#4
DetectiveLoki Second Lieutenant Drives: 2008 BMW 335i Convertible Join Date: Jan 2012 Location: Orange County - SOCAL Posts: 287 iTrader: (4)	Do you guys know how much this typically cost?
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02-18-2014, 08:42 PM	#6
Jklad Lieutenant Drives: 2007 335i Coupe Join Date: Nov 2010 Location: Palatine, IL Posts: 408 iTrader: (0)	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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