[twosickz]

Any idea why I keep getting this oil leak around the oil cooler lines after performing the oil filter housing gasket DIY?

I've replaced both oil cooler line o rings with brand new oem ones. Am I over tightening this bolt?

[pagedownhere]

Any luck on this? I replaced my ofhg and reused the 2 o-rings you mention as I didnt have new ones on hand. It started leaking so i relaced them with new ones from the dealer. Seems to still leak from those 2 o-rings. I tightened it pretty damn good. Any suggestions?
Thanks!!

[Stroker1]

Looks like quite alot of corrosion in area. My guess is the bore and fitting grooves weren't cleaned well enough prior to assenbly I would clean bores and oring grooves on fittings, lube the orings before assembly and torque to specs.

[twosickz]

Originally Posted by pagedownhere

Any luck on this? I replaced my ofhg and reused the 2 o-rings you mention as I didnt have new ones on hand. It started leaking so i relaced them with new ones from the dealer. Seems to still leak from those 2 o-rings. I tightened it pretty damn good. Any suggestions?
Thanks!!

After weeks & weeks, I figured it out. It ended up being this cap gasket, that is highlighted in yellow, causing the leak.

I removed the 2 screws holding the cap and put silicone gasket maker and it hasn't leaked since.

[pagedownhere]

twosickz Thanks! I will check that out! I was going to put some black RTV gasket maker on the 2 oil cooler connections as well. It wouldn't hurt to put it on all 3 spots would it?

[twosickz]

Originally Posted by pagedownhere

twosickz Thanks! I will check that out! I was going to put some black RTV gasket maker on the 2 oil cooler connections as well. It wouldn't hurt to put it on all 3 spots would it?

Don't put any gasket maker in the o ring connections. Just the cap and very little aswell.

[Jklad]

Originally Posted by twosickz

After weeks & weeks, I figured it out. It ended up being this cap gasket, that is highlighted in yellow, causing the leak.

I removed the 2 screws holding the cap and put silicone gasket maker and it hasn't leaked since.

Is it possible to purchase the gasket for that cap seperately? I've looked all over realoem and can't find it listed. the aftermarket oil cooler tstat vendors do not sell it either. Mine's been seeping oil for a bit.

[twosickz]

Originally Posted by Jklad

Is it possible to purchase the gasket for that cap seperately? I've looked all over realoem and can't find it listed. the aftermarket oil cooler tstat vendors do not sell it either. Mine's been seeping oil for a bit.

Not sure. I would ask your local bmw parts dept & provide vin.

[pagedownhere]

By the way twosickz is spot on with this! Popped off the oil cooler stat cover, added a small amount of black gasket maker and havent had an issue since!

thanks!

[feuer]

Originally Posted by Jklad

Is it possible to purchase the gasket for that cap seperately? I've looked all over realoem and can't find it listed. the aftermarket oil cooler tstat vendors do not sell it either. Mine's been seeping oil for a bit.

No gasket replacement. No thermostat replacement either. Silicone would be only option.

[Tallicia]

This is going to become a much much more important thing to know as these incredible motors get into their truly appreciated years!

I've been chasing this leak all year. I see aftermarket a $50 replacement with seal for the thermostat cover.

Thanks for confirming my suspicions. I replace the OFH gaskets twice, and just replaced o-rings a second time. This is the only other possible place and it sure does it in a very hidden way. Grrr.

It's a real real shame there isn't a $10 gasket that can be purchased to replace this!

[EconIsLyfe]

FTP has a thermostat cover kit for $45 on ECS Tuning. Comes with the cover, new bolts, and a new gasket.

https://www.ecstuning.com/b-ftp-motorsport-parts/ftp-thermostat-cover-kit/sg84006-ct~ftp/?gclid=CjwKCAiA4Y7yBRB8EiwADV1haeOOmXZks9SU5dyBK5s QiPPq8UUtZ4eVT3HmKyZ2hw27k6iLMOacXBoCXu4QAvD_BwE

[rgfinn76]

What is the correct torque on the 13mm bolt holding the H plate and oil cooler lines in place?? I looked all over and cannot find the proper torque.

I just got don't replace the OFHG and see the same little oil residue leaking as in the picture above.

[EconIsLyfe]

Originally Posted by rgfinn76

What is the correct torque on the 13mm bolt holding the H plate and oil cooler lines in place?? I looked all over and cannot find the proper torque.

I just got don't replace the OFHG and see the same little oil residue leaking as in the picture above.

The oil lines will leak right there even with new O-rings because the plate that holds them down bends (like in the picture if you look closely). It can be heated and bent back, replaced for $180 each line, or converted to 10AN (this is the option I went with)

[rgfinn76]

I replaced the O rings again this morning. I noticed it’s leaking from damn cover and not the cooler lines.

Guess I’ll get the placement kit from ECS.

[BarraCuda]

Originally Posted by EconIsLyfe

The oil lines will leak right there even with new O-rings because the plate that holds them down bends (like in the picture if you look closely). It can be heated and bent back, replaced for $180 each line, or converted to 10AN (this is the option I went with)

EconIsLyfe, thank you! Seems like the best option on this (I hate doing a job more than once) can you give a quick step by step on the conversion for us, I found some 10an fittings, would you have a parts list?

[jin]

Originally Posted by EconIsLyfe

The oil lines will leak right there even with new O-rings because the plate that holds them down bends (like in the picture if you look closely). It can be heated and bent back, replaced for $180 each line, or converted to 10AN (this is the option I went with)

I think I have this problem. What is the adapter plate you used for the oil lines? Can you use the adapter with the stock oil lines?

[chance91]

Originally Posted by feuer

No gasket replacement. No thermostat replacement either. Silicone would be only option.

Just wanted to give back here. Came up in a search and found the solution for that cover.
An oring sized
37 mm ID, 43 mm OD, 3 mm Width

Works perfectly. Used in a few of my cars now.

https://www.amazon.com/gp/aw/d/B005RUTCYI/ref=ppx_yo_mob_b_inactive_ship_o0_img?ie=UTF8&psc= 1

[Wolf 335]

Originally Posted by chance91

Just wanted to give back here. Came up in a search and found the solution for that cover.
An oring sized
37 mm ID, 43 mm OD, 3 mm Width

Works perfectly. Used in a few of my cars now.

https://www.amazon.com/gp/aw/d/B005R...?ie=UTF8&psc=1

Link to o-ring thread:

Make sure you get the Viton material o-ring.

[hansb109]

Hello, I had an oil leak on the oil lines similar to the OP. I ended up swapping the o-ring for the thermostat cover on the oil filter housing and this solved my issue as well. Purchase an o-ring with the same measurements previously listed on this post and it should work. Where the oil ends up pooling leads you to believe that the o-rings for the oil lines themselves are the culprits, but in fact they're not the issue (in my case). This leak was frustrating to fix. Thank goodness for this post. I have an N55 engine on an F32 and this fix still applies.

[isaiahN]

Originally Posted by hansb109

Hello, I had an oil leak on the oil lines similar to the OP. I ended up swapping the o-ring for the thermostat cover on the oil filter housing and this solved my issue as well. Purchase an o-ring with the same measurements previously listed on this post and it should work. Where the oil ends up pooling leads you to believe that the o-rings for the oil lines themselves are the culprits, but in fact they're not the issue (in my case). This leak was frustrating to fix. Thank goodness for this post. I have an N55 engine on an F32 and this fix still applies.

I have a small oil leak at the oil lines where it meets the thermostat. Some oil residue on the lines as well as where the thermostat meets the oil filter housing. Some light residue on the tensioner as well. Were these your symptoms too? I am thinking to replace the thermostat cover gasket as its the cheapest part to start diagnosing. Which gasket did you end up using? Thanks in advance!

[lowrydr310]

Originally Posted by isaiahN

I have a small oil leak at the oil lines where it meets the thermostat. Some oil residue on the lines as well as where the thermostat meets the oil filter housing. Some light residue on the tensioner as well. Were these your symptoms too? I am thinking to replace the thermostat cover gasket as its the cheapest part to start diagnosing. Which gasket did you end up using? Thanks in advance!

The gaskets aren't available from BMW, but a 3mm thick 37mm ID, 43mm OD, Viton o-ring works perfectly. I bought a five pack from McMaster-carr. It's been installed for over three years now and still leak-free!

https://www.e90post.com/forums/showthread.php?t=1550526

FCP sells a replacement part made by Elring that has the octagon shape, but reviews say it doesn't last. Probably the material. As I said three years on the Viton round o-ring and it's leak free.

Edit: I just found the package and I have one left! Free if you want it, shoot me a PM with shipping info.

Part number OR-338537-00