[E90lmao]

Originally Posted by feuer

Very nice! https://www.maloindustries.com/

I just ordered one I'll see how it works out! I'll update this post when I get it installed.

[david in germany]

If anyone is interested. The difference between the felpro version and the o-ring.
https://www.reddit.com/r/E90/comment...&utm_term=link

[mj6234]

The one in the reddit post is only rated up to 100*C. I wouldnt use that for this application as we all know our oil runs over that. Seems like viton would be a much better material choice.

https://www.amazon.com/Mr-Ring-3X37-...18&sr=8-3&th=1

I would guess this standard o-ring would work as well.

https://www.amazon.com/220-Viton-Rin...ustrial&sr=1-1

[IllSic_Design]

you def want to use Viton o-rings on these cars

[david in germany]

Originally Posted by mj6234

The one in the reddit post is only rated up to 100*C. I wouldnt use that for this application as we all know our oil runs over that. Seems like viton would be a much better material choice.

https://www.amazon.com/Mr-Ring-3X37-...18&sr=8-3&th=1

I would guess this standard o-ring would work as well.

https://www.amazon.com/220-Viton-Rin...ustrial&sr=1-1

Yep, one week and it is already weeping.

[soulcrusher]

Originally Posted by E90lmao

I just ordered one I'll see how it works out! I'll update this post when I get it installed.

How'd it go? Is it just one seal?
Oh. 10$ shipping

[soulcrusher]

thanks for the posts!

[arnas]

Hi guys,

I am also facing oil thermostat gasket leak and was doing some research on the internet. I found this post which was very helpful. So I started to look for Viton 43mm x 3mm o'ring. I was able to found that BMW make this o'ring as replacement part for K series motorcycles water pump I guess.

Replacement part is called "O-RING 43X3-N-FPM 85" and OEM part number is 07 11 9 905 382.

So I will try to order it at my local BMW dealer and hope that it will fit. I will update how it goes after installation.

Also, maybe anyone know if this gasket is the same for F series chassis?

[soulcrusher]

These viton o-rings are backordered. Have been backordered for a long period now, extending to May 2022.

Anyone here have spares they can send me?
Im in Miami, FL.

[gster109]

Originally Posted by feuer

Very nice! https://www.maloindustries.com/

Sold out, RIP.

By chance do you or anyone else here know if the thermostat gasket leak will mask itself as a oil cooler o ring sweating?? the drivers side one mainly. One single drop of oil.

[ichibanset]

1 7/16 ID x 1 11/16 OD x 1/8 also fits.

[mozmann]

Any idea about the torque spec for the screws? I replaced the old one with the viton gasket, torqued the bolts to 16.5 Nm slowly, weeping at idle. I am afraid to over tighten and snap the screws...

[lowrydr310]

Originally Posted by mozmann

Any idea about the torque spec for the screws? I replaced the old one with the viton gasket, torqued the bolts to 16.5 Nm slowly, weeping at idle. I am afraid to over tighten and snap the screws...

Not sure but I replaced mine a few weeks ago and it is not leaking. You're more likely to strip the threads in the aluminum housing than snapping the screws. I just went based on feel; I have the torque specs for the oil filter housing and oil cooler thermostat bolts so I used them, but for the thermostat cover bolts I used a 1/4" drive ratchet with a short extension and the appropriate torx bit. It felt far less than 16Nm though. Did you go back and forth between the two bolts tightening each in sequence?

As of January 2024 I have four extra o-rings since the minimum order was 5 (for $16 including overnight shipping.) Happy to share if anyone needs one, no charge, just PM me.

[PMT_BOI]

Hey guys Im a new bmw owner
and I just replaced OFHG on my e92 335i (n55) I made the mistake of opening the thermostat lid so now I have a leak there

My question is probably a dumb one... but do I drain fluids again to replace this gasket???
I just put fluids in as well as bled coolant and primed the engine

[Malo_Industries]

Sorry guys, I keep a little more inventory of these now.
If, I ever run out again it should only be for 3 weeks max

https://www.maloindustries.com/produ...thermostat-lid

[Stubbie Blue]

I did the 2 OFHGs on my 2012 135i N55, but after a few months I saw a buildup of grime from the oil cooler thermostat cap.



So I got some FKM fluoro-rubber O-rings from AliExpress.

https://www.aliexpress.us/item/3256806543028225.html

OD 43mm, ID 37mm, CS 3mm.
I got 5 for $1.83.

I didn't know what the torque spec was for the T30 bolts for the thermostat cap, so I did 10 Nm or 89 inch-lb.

I went on a test drive with some full throttle runs and the oil temp got to 240F, and it seems fine with no leaks. I will update this later if it does leak.