OFHG

dleccord · 11-02-2017, 01:11 PM

Going to replace the gasket on my N55 pretty soon. Do I need new tensioner and belts? Also what about the coolant hoses and the connects to the housing? Thanks!

Welcome to NBA Jam · 11-02-2017, 04:04 PM

Tensioner you should do if you see the pulley wobbling. I would do the belt since it may have oil on it from the leak.

I did the pulleys, tensioner, and belt because I like being thorough with things when I'm performing maintenance

dleccord · 11-02-2017, 09:27 PM

Quote:

Originally Posted by Welcome to NBA Jam

Tensioner you should do if you see the pulley wobbling. I would do the belt since it may have oil on it from the leak.

I did the pulleys, tensioner, and belt because I like being thorough with things when I'm performing maintenance

did you replace the bolts for the housing?

drmdvl · 11-03-2017, 01:36 AM

Agreed - OFHG leak is usually cause of belt contamination. Should inspect the tensioner while in there.

dleccord · 11-03-2017, 03:29 AM

Quote:

Originally Posted by drmdvl

Agreed - OFHG leak is usually cause of belt contamination. Should inspect the tensioner while in there.

Can you explain how bad tensioners causes the oil filter housing gasket to go bad?

NRigs · 11-03-2017, 07:44 AM

Quote:

Originally Posted by dleccord

Can you explain how bad tensioners causes the oil filter housing gasket to go bad?

I think he meant the opposite. I had to replace my belt, tensioner and upper pulley because of my OFHG leak. My lower pulley actually looked pretty good and didn't have any oil on it. My tensioner and upper pulley were pretty nasty.

Needbmwpartzz · 11-03-2017, 09:29 AM

Toss in air filter or clean MAF.

drmdvl · 11-04-2017, 12:52 AM

Yup - oil leak leads to bad tensioner / belt, not the other way around

Oil leak from housing gasket will contaminate and attack the rubber on your accessory belt, sling all over your drive pulley surfaces - which attracts dirt and gunks them up.
Just inspect if you've had oil leak for a while... it will eventually need to be done.

OP3NAIR · 11-04-2017, 05:20 PM

Can also do vanos solenoid o rings and seals while you’re in there. Those can start leaking too.

Needbmwpartzz · 11-04-2017, 09:23 PM

Clean engine

dleccord · 11-06-2017, 11:23 PM

Quote:

Originally Posted by OP3NAIR

Can also do vanos solenoid o rings and seals while you’re in there. Those can start leaking too.

Vanos solenoids or o-rings? Are seals the same as o-rings? Also when should we replace vanos solenoids?

Guys: if my car has the oil cooler, is there a gasket that needs to be replaced for that at the oil housing?

NRigs · 11-07-2017, 08:52 AM

Quote:

Originally Posted by dleccord

Vanos solenoids or o-rings? Are seals the same as o-rings? Also when should we replace vanos solenoids?

Guys: if my car has the oil cooler, is there a gasket that needs to be replaced for that at the oil housing?

I believe there are two ring gaskets. One to each hose. I don't have the oil cooler so they only replaced the one gasket for the housing for me.

OP3NAIR · 11-07-2017, 09:35 AM

Quote:

Originally Posted by dleccord

Vanos solenoids or o-rings? Are seals the same as o-rings? Also when should we replace vanos solenoids?

Guys: if my car has the oil cooler, is there a gasket that needs to be replaced for that at the oil housing?

The vanos solenoids have an O ring and a seal on them that keeps oil in the engine. These can begin to leak over time. If your solenoids are working you can just change the seals.
1 set per solenoid:
https://www.ecstuning.com/b-genuine-...t/11367548459/

The oil cooler has 2 O rings, one on each hose connection where it goes into the cooler housing. The cooler housing has a gasket where it is bolted to the filter housing.

11-02-2017, 01:11 PM	#1
dleccord Captain 99 Rep 840 Posts Drives: 2011 BMW 335i E90 Join Date: Apr 2016 Location: Nelson, New Zealand iTrader: (0)	OFHG - what else while I’m there?? Going to replace the gasket on my N55 pretty soon. Do I need new tensioner and belts? Also what about the coolant hoses and the connects to the housing? Thanks!
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11-02-2017, 04:04 PM	#2
Welcome to NBA Jam Is it the shoes!? 3884 Rep 5,112 Posts Drives: (Sold) 2011 E92 335i ZMP 6MT Join Date: Mar 2014 Location: USA iTrader: (1)	Tensioner you should do if you see the pulley wobbling. I would do the belt since it may have oil on it from the leak. I did the pulleys, tensioner, and belt because I like being thorough with things when I'm performing maintenance
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11-03-2017, 01:36 AM	#4
drmdvl Second Lieutenant 57 Rep 271 Posts Drives: 2015 X5 50i, 2015 Macan Turbo Join Date: Jul 2011 Location: Northern CO iTrader: (0) Garage List 2020 BMW X5 M50i [0.00] 2017 BMW i3 REX [0.00] 2015 Porsche Macan ... [0.00]	Agreed - OFHG leak is usually cause of belt contamination. Should inspect the tensioner while in there. __________________ 2013 E92 335xi 6MT MSport JB4, PS2, Pure Inlet, N20 TMAP, ETS FMIC, Drop in filter, 4" AR DP, Fuel-it Stage 2, ER CP, GFB DV+, E50
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11-03-2017, 09:29 AM	#7
Needbmwpartzz Colonel 851 Rep 2,793 Posts Drives: 2009 bmw 328i x-drive Join Date: Feb 2014 Location: Kitchener/Waterloo iTrader: (0)	Toss in air filter or clean MAF.
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11-04-2017, 12:52 AM	#8
drmdvl Second Lieutenant 57 Rep 271 Posts Drives: 2015 X5 50i, 2015 Macan Turbo Join Date: Jul 2011 Location: Northern CO iTrader: (0) Garage List 2020 BMW X5 M50i [0.00] 2017 BMW i3 REX [0.00] 2015 Porsche Macan ... [0.00]	Yup - oil leak leads to bad tensioner / belt, not the other way around Oil leak from housing gasket will contaminate and attack the rubber on your accessory belt, sling all over your drive pulley surfaces - which attracts dirt and gunks them up. Just inspect if you've had oil leak for a while... it will eventually need to be done. __________________ 2013 E92 335xi 6MT MSport JB4, PS2, Pure Inlet, N20 TMAP, ETS FMIC, Drop in filter, 4" AR DP, Fuel-it Stage 2, ER CP, GFB DV+, E50 Last edited by drmdvl; 11-04-2017 at 01:12 AM..
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11-04-2017, 05:20 PM	#9
OP3NAIR Second Lieutenant 68 Rep 211 Posts Drives: '11 335i e93, '03 325xiT Join Date: Jan 2015 Location: NoVA iTrader: (0)	Can also do vanos solenoid o rings and seals while you’re in there. Those can start leaking too.
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11-04-2017, 09:23 PM	#10
Needbmwpartzz Colonel 851 Rep 2,793 Posts Drives: 2009 bmw 328i x-drive Join Date: Feb 2014 Location: Kitchener/Waterloo iTrader: (0)	Clean engine
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