GR Yaris Rötheli Racing GR Yaris Oil Cooler - Design Vulnerability & Support Experience

Tensho_C

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I wanted to share a factual timeline regarding my experience with the Rötheli Racing oil cooler kit and the support provided after a critical component failure.

The kit was installed directly by Rötheli Racing in February 2024. After 28 months and 50,000 km of mixed road and infrequent track use(around 5 times total), the car suddenly developed a severe engine oil leak. A dealership in the Netherlands inspected the vehicle and found that the high-pressure line had been routed tightly against the chassis. Constant vibration had worn a hole straight through the metal pipe. The dealer performed an emergency weld to keep the car mobile.

I reached out to the owner of Rötheli Racing to report this. He denied liability, stating a third-party mechanic must have accidentally twisted the sandwich plate during a standard oil change—a vulnerability he never communicated when installing it. I initially asked him to handle the repair himself. However, his available date did not line up with my travel, and his quote for the full service, installation, and an oil change was too expensive, especially after the €555 I had already spent at the dealer (plus the inherent additional risk of driving 1,000 km to his shop in Switzerland before having the pipe properly replaced).

To manage my costs, I shifted the request and asked if he could just fabricate the replacement line for me to pick up during my upcoming trip to Switzerland. Once the job went from a high-revenue workshop service to a simple CHF 100 part purchase, his cooperation stopped.

He emphasized to me that the dealer's weld was dangerous and could destroy my engine from metal debris, but then made sourcing a replacement as difficult as possible. When I asked for the basic schematics or dimensions so a custom shop in the Netherlands could replicate it accurately, he declined, stating he had no schematics for the hoses and that it was a simple job for a shop to figure out. His solution requires me to drain the oil, remove the broken pipe, and leave my car completely immobilized on a garage lift while a local shop tries to reverse-engineer it from scratch.

Wanting to avoid that logistical mess, I decided to move past the initial repair costs dispute entirely. I explicitly agreed to his terms and confirmed I would pay the full CHF 100 just to pick up the line this coming Friday (which he had initially mentioned was possible). The moment he realized he wasn't getting workshop labor and that I was dropping the argument, he completely backed out, informing that he suddenly did not have the necessary fittings in stock to make the line anymore.

If you run this kit, check your chassis clearance immediately. It lacks any built-in anti-rotation protection, making it highly vulnerable during routine maintenance. More importantly, be aware that if a critical failure occurs, this vendor is entirely comfortable leaving you with an engine-threatening component if he cannot secure the full repair revenue he wants from you.

(Note: In accordance with rules regarding private correspondence, I have not posted screenshots or direct quotes from the emails. However, I hold full, unedited email documentation of this entire exchange and will gladly provide it to the forum moderators upon request to verify the facts stated above).
 

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I wanted to share a factual timeline regarding my experience with the Rötheli Racing oil cooler kit and the support provided after a critical component failure.

The kit was installed directly by Rötheli Racing in February 2024. After 28 months and 50,000 km of mixed road and infrequent track use(around 5 times total), the car suddenly developed a severe engine oil leak. A dealership in the Netherlands inspected the vehicle and found that the high-pressure line had been routed tightly against the chassis. Constant vibration had worn a hole straight through the metal pipe. The dealer performed an emergency weld to keep the car mobile.

I reached out to the owner of Rötheli Racing to report this. He denied liability, stating a third-party mechanic must have accidentally twisted the sandwich plate during a standard oil change—a vulnerability he never communicated when installing it. I initially asked him to handle the repair himself. However, his available date did not line up with my travel, and his quote for the full service, installation, and an oil change was too expensive, especially after the €555 I had already spent at the dealer (plus the inherent additional risk of driving 1,000 km to his shop in Switzerland before having the pipe properly replaced).

To manage my costs, I shifted the request and asked if he could just fabricate the replacement line for me to pick up during my upcoming trip to Switzerland. Once the job went from a high-revenue workshop service to a simple CHF 100 part purchase, his cooperation stopped.

He emphasized to me that the dealer's weld was dangerous and could destroy my engine from metal debris, but then made sourcing a replacement as difficult as possible. When I asked for the basic schematics or dimensions so a custom shop in the Netherlands could replicate it accurately, he declined, stating he had no schematics for the hoses and that it was a simple job for a shop to figure out. His solution requires me to drain the oil, remove the broken pipe, and leave my car completely immobilized on a garage lift while a local shop tries to reverse-engineer it from scratch.

Wanting to avoid that logistical mess, I decided to move past the initial repair costs dispute entirely. I explicitly agreed to his terms and confirmed I would pay the full CHF 100 just to pick up the line this coming Friday (which he had initially mentioned was possible). The moment he realized he wasn't getting workshop labor and that I was dropping the argument, he completely backed out, informing that he suddenly did not have the necessary fittings in stock to make the line anymore.

If you run this kit, check your chassis clearance immediately. It lacks any built-in anti-rotation protection, making it highly vulnerable during routine maintenance. More importantly, be aware that if a critical failure occurs, this vendor is entirely comfortable leaving you with an engine-threatening component if he cannot secure the full repair revenue he wants from you.

(Note: In accordance with rules regarding private correspondence, I have not posted screenshots or direct quotes from the emails. However, I hold full, unedited email documentation of this entire exchange and will gladly provide it to the forum moderators upon request to verify the facts stated above).
Hi

Just to be absolutely clear. This will have legal consequenzes for you.
Please feel free to post all our conversation.

As i already told you, we don‘t have the fittings in stock and therefore i can‘t fabricate a line for you on such short notice.
You wanted it done until next friday, which is not possible for us.

And as i also explained to you, after 50‘000km, hopefully 5x oil changes and 2.5 years, it can happen that if someone doesn‘t carefully align the lines after he changed the oil filter, the fittings can rub on the radiator support bar.
If someone doesn‘t check that, when we install it, there‘s a 3cm gap, than he has no business servicing those vehicles.

Last but not least, we stand 100% behind our products and support anyone who buys something from us.
But you just wanted money for a repair that was not in the slightest our mistake.

So yeah.

Have a nice evening.

Phil
 
Why not just to buy the fitting and redo the line?

I don't really understand the frustration or why you're trying to make it sound like this is somehow Phil's fault.
This is clearly an installation error, and the manufacturer of the kit definitely isn't the one responsible for all the trouble you're having here.
 
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Why not just to buy the fitting and redo the line?

I don't really understand the frustration or why you're trying to make it sound like this is somehow Phil's fault.
This is clearly an installation error, and the manufacturer of the kit definitely isn't the one responsible for all the trouble you're having here.
The manufacturer and the installer are both the same company
 
The manufacturer and the installer are both the same company
Yeah. 2.5 years and 50'000km ago.

If we had installed it wrong, it would have been an issue after 2 weeks.

What you don't seem to understand is, that if you loosen the oil filter, the sandwich plate can come slightly loose. And if the mechanic than proceeds to tighten the oil filter, he will slightly change the position of the lines. Which than can cause rubbing.
And as we haven't done any of the last 5 services on your car, i'm 100% sure, it has absolutely nothing to do with the original installation done by us.
 
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