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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 11-18-2009, 09:15 AM
cn90 cn90 is online now
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Oil Filter HOUSING: Additional Blue RTV Sealant?

A friend told me when he replaced the Oil Filter HOUSING Rubber Gasket (Black dots in the pic below), he also added a thin bead of RTV Blue Sealant around the perimeter (Blue dots).

Has anyone done this trick of a thin bead of RTV Blue Sealant or is it overkill?

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  #2  
Old 11-18-2009, 09:30 AM
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TeaRex714 TeaRex714 is offline
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I just replaced mine about a week ago and didn't use any extra sealant. I would think it was not a great idea. That seal doesn't make that much contact with the engine as it is. Anything that increases the distance between the engine and the housing, even a little, would seem to me like a bad idea.
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  #3  
Old 11-18-2009, 09:37 AM
poolman poolman is offline
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I would think it to be a good idea--the sealent will add insurance against another leak coming along--you would need to allow the sealent to dry throughly before starting up again--once the bolts are tuorqed down the sealeant would thin out and help not hinder. I would use the Permatex Black ultra seal instead of the blue--
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Old 11-18-2009, 09:42 AM
cn90 cn90 is online now
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Hey poolman,

Slightly off topic what is the main difference between Black and Blue RTV?

It looks like a "zoo" overhere:
http://www.permatex.com/products/Aut...ket_makers.htm
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  #5  
Old 11-18-2009, 01:00 PM
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I didn't do the housing sealant yet, but it is on my immediate to-do list. I AM planning to use a little bit of Permatex RTV right on the edges of the housing. Unlike your blue dots, I was planning to go right outside the 4 bolts, and put a little bit around the head of the bolts.

I am planning to use the 'copper' color RTV as this is what I already have from using it on the valve gasket cover. Why buy another one? The copper RTV has a very high temperature specs, so I am sure it will be ok.

I think its a good idea to use RTV to go into all those microscopic gaps and scratches to fill them up and seal them. It can't hurt, right? Just to put them on the very outside edge to make sure it is not going to get inside anything in there.

mw
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Old 11-18-2009, 01:04 PM
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Quote:
Originally Posted by cn90 View Post
Hey poolman,

Slightly off topic what is the main difference between Black and Blue RTV?

It looks like a "zoo" overhere:
http://www.permatex.com/products/Aut...ket_makers.htm
This is the one I have, and used.

http://www.permatex.com/products/Aut...sket_Maker.htm

Part number 101BR.

mw
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  #7  
Old 11-18-2009, 04:11 PM
poolman poolman is offline
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Hey CN90--I've used both the Blue and the Black Permatex for years now--the Black came out about 15 years or so ago and I was turned on to it by a freind in the biz--the stuff is much stronger thane the blue--oil won't touch it as long as there was no oil under it when applied--strong stuff---I've used it under 427 Ford FE intakes without the mounting end gaskets and the stuff held--in my book thats as strong as it gets.
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Old 11-18-2009, 05:17 PM
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Quote:
Originally Posted by Beenthere View Post
FYI-

From a technical standpoint using any sealant betwee the two surfaces reduces the pressure on the OE seal from what it is designed to be. The blue Permatex is formulated to cure even in the presents of oil, whereas most other silicone sealers are not.

YMMV
What is the thickness of the thin smear of RTV at the edge of the housing after the bolts have been torqued to spec?

I have no idea what it is. Maybe you have some info somewhere. But just using my common sense, it is definitely less then 0.1 millimeter.

If 0.1mm will reduce the pressure of the housing gasket by that much as to create a leak problem... ??? Than we are really in trouble. - I don't think so.

mw
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  #9  
Old 11-18-2009, 05:35 PM
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http://www.intengineering.com/VW/18T...69812-1-2.html , victor reinz has a few different sealents that work excellent. When I look under the hood of a car at the shop and see blue or red sealent oozing out behind a waterpump or something of that nature I usually think the person that did this before didn't really know what they were doing. No offense just my two cents
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  #10  
Old 11-18-2009, 09:04 PM
cn90 cn90 is online now
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After the Gasket is installed in the Housing, it sticks out about 1mm before install.
I understand that BMW does not call for extra sealant, but it is this goofy design that allows the factory gasket to leak as early as 50K miles.
A very thin bead of RTV sealnt will be squeezed down to paper thin once the bolts are torqued down.
The key word here is thin bead.

I guess I will be the guinea pig and will report back.
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  #11  
Old 11-20-2009, 12:48 PM
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anyone have a tutorial/DIY for this? I have the gasket and need to do it already
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  #12  
Old 11-20-2009, 01:09 PM
cn90 cn90 is online now
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Originally Posted by oekundar View Post
anyone have a tutorial/DIY for this? I have the gasket and need to do it already
The DIYs you find on the web are mostly OK, some of them miss details such as torque and Freeze Plugs etc.

I do have the DIY, I am writing it up this weekend if you can wait.
It is more complex than you think.

1- O.F. Housing Seal DIY is not difficult but one can strip a bolt if not careful:

http://bimmerboard.com/forums/posts/727932

2- The two (2) Freeze Plugs in the back are troublesome, they leak too:
http://www.bimmerfest.com/forums/sho...t=freeze+plugs

I am putting together a diy for the whole thing: gasket + two (2) Freeze Plugs.
So stay tuned. I will post it this weekend.

Last edited by cn90; 11-20-2009 at 01:18 PM.
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  #13  
Old 11-20-2009, 03:25 PM
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gtxragtop gtxragtop is offline
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It's not a gasket. It is an O-ring. It is not designed to have any additional sealers. Make sure that all surfaces are spotless that this O-Ring will contact. M8 bolts to be tightened to 22NM
or 16.2 foot pounds.
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  #14  
Old 11-20-2009, 05:23 PM
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I can and will wait for the DIY
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  #15  
Old 11-21-2009, 04:54 AM
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When the oil filter housing leaks, is it obvious to see where the leak's coming from, or does it travel down the lip of the oil pan and whatnot ?
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  #16  
Old 11-21-2009, 04:15 PM
cn90 cn90 is online now
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Quote:
Originally Posted by DHoang View Post
When the oil filter housing leaks, is it obvious to see where the leak's coming from, or does it travel down the lip of the oil pan and whatnot ?
When it leaks, it leaks from either:
1. Gasket (common problem after 60K miles).....or
2. The 2 "Freeze Plugs" in the back.

Either way, the area BEHIND the OF Housing will be wet and the Oil Pan will have trace of oil dripping. Mostly because the wind created by Fan Blade and the road wind pushes the oil back.
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