Oil cooler line broken bolt hole
Thread Starter
Junior Member
Joined: May 2018
Posts: 49
Likes: 0
C240
Oil cooler line broken bolt hole
Hi everyone,
So I attempted to reinstall the banjo bolt of the oil cooler line to the transmission and the metal essentially broke away from it. I've attached a picture. What would be best here? Some sort of time sert? TIA
Image
https://ibb.co/MfYHJbn
So I attempted to reinstall the banjo bolt of the oil cooler line to the transmission and the metal essentially broke away from it. I've attached a picture. What would be best here? Some sort of time sert? TIA
Image
https://ibb.co/MfYHJbn
Thread Starter
Junior Member
Joined: May 2018
Posts: 49
Likes: 0
C240
Well that would necessitate dropping the transmission. The dealer will charge a hefty tag for that, and I just got finished putting the engine back together. A less expensive/invasive course of action is preferred, however obviously not at the expense of quality.
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Joined: Dec 2003
Posts: 3,275
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From: BC, Canada
2003 C230K Coupe Orion Blue
Bit of a dumb question but I can't see where the problem is. Are you talking about the metal shavings inside the banjo screw threads? Or did a chunk of the transmission housing break clean off? The photo doesn't show the hole where the banjo screw threads in. It's covered by the shield.
Last edited by slammer111; Jan 12, 2022 at 12:18 AM.
Thread Starter
Junior Member
Joined: May 2018
Posts: 49
Likes: 0
C240
Bit of a dumb question but I can't see where the problem is. Are you talking about the metal shavings inside the banjo screw threads? Or did a chunk of the transmission housing break clean off? The photo doesn't show the hole where the banjo screw threads in. It's covered by the shield.
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Joined: Sep 2016
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From: New England! :-)
2005 C230K Sport Coupe
OUCH!
Sorry to be the bearer of bad news.
So, you need to fix the hole for the banjo bolt on the side of the tranny?
Such as, the transmission fluid hole, that is capped by a red fitting on the following photo:
https://ibb.co/df6JRMV
Well, bad news and good news.
The bad news, forget about fixing that hole.
The banjo bolt needs adequate torque to seat properly. And, the banjo bolt must also be square to the hole. Otherwise, the force of the bolt on the flare will be lopsided and it will leak.
You can't MIG or TIG that piece back. A proper weld has the weld go all of the way through the metal, on both sides. If the crack wasn't fully welded, then the crack would grow over time. Plus, since it's aluminum, it has "high" expansion and contraction rates, that are not perfectly matched with the weld material. There's not enough "meat" on the external piece, to be able to handle a different expansion/contraction rate at the crack/weld point.
The "good news" is that "only the bell housing" has to be replaced.
22.6 Bellhousing Swap & Reassembly
Gary Ferraro
Needless to say, this is something that has to be done by a transmission shop.
Good Luck!
Sorry to be the bearer of bad news.
So, you need to fix the hole for the banjo bolt on the side of the tranny?
Such as, the transmission fluid hole, that is capped by a red fitting on the following photo:
https://ibb.co/df6JRMV
Well, bad news and good news.
The bad news, forget about fixing that hole.
The banjo bolt needs adequate torque to seat properly. And, the banjo bolt must also be square to the hole. Otherwise, the force of the bolt on the flare will be lopsided and it will leak.
You can't MIG or TIG that piece back. A proper weld has the weld go all of the way through the metal, on both sides. If the crack wasn't fully welded, then the crack would grow over time. Plus, since it's aluminum, it has "high" expansion and contraction rates, that are not perfectly matched with the weld material. There's not enough "meat" on the external piece, to be able to handle a different expansion/contraction rate at the crack/weld point.
The "good news" is that "only the bell housing" has to be replaced.
Gary Ferraro
Needless to say, this is something that has to be done by a transmission shop.
Good Luck!
Last edited by RedGray; Jan 13, 2022 at 02:25 AM.
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Thread Starter
Junior Member
Joined: May 2018
Posts: 49
Likes: 0
C240
OUCH!
Sorry to be the bearer of bad news.
So, you need to fix the hole for the banjo bolt on the side of the tranny?
Such as, the transmission fluid hole, that is capped by a red fitting on the following photo:
https://ibb.co/df6JRMV
Well, bad news and good news.
The bad news, forget about fixing that hole.
The banjo bolt needs adequate torque to seat properly. And, the banjo bolt must also be square to the hole. Otherwise, the force of the bolt on the flare will be lopsided and it will leak.
You can't MIG or TIG that piece back. A proper weld has the weld go all of the way through the metal, on both sides. If the crack wasn't fully welded, then the crack would grow over time. Plus, since it's aluminum, it has "high" expansion and contraction rates, that are not perfectly matched with the weld material. There's not enough "meat" on the external piece, to be able to handle a different expansion/contraction rate at the crack/weld point.
The "good news" is that "only the bell housing" has to be replaced.
https://www.youtube.com/watch?v=FtI3IpMcuqg
22.6 Bellhousing Swap & Reassembly
Gary Ferraro
Needless to say, this is something that has to be done by a transmission shop.
Good Luck!
Sorry to be the bearer of bad news.
So, you need to fix the hole for the banjo bolt on the side of the tranny?
Such as, the transmission fluid hole, that is capped by a red fitting on the following photo:
https://ibb.co/df6JRMV
Well, bad news and good news.
The bad news, forget about fixing that hole.
The banjo bolt needs adequate torque to seat properly. And, the banjo bolt must also be square to the hole. Otherwise, the force of the bolt on the flare will be lopsided and it will leak.
You can't MIG or TIG that piece back. A proper weld has the weld go all of the way through the metal, on both sides. If the crack wasn't fully welded, then the crack would grow over time. Plus, since it's aluminum, it has "high" expansion and contraction rates, that are not perfectly matched with the weld material. There's not enough "meat" on the external piece, to be able to handle a different expansion/contraction rate at the crack/weld point.
The "good news" is that "only the bell housing" has to be replaced.
https://www.youtube.com/watch?v=FtI3IpMcuqg
22.6 Bellhousing Swap & Reassembly
Gary Ferraro
Needless to say, this is something that has to be done by a transmission shop.
Good Luck!
