Ferrari 330 Fluid Leaks
December 7, 2025
As the work continued on the GTC I have at my shop, I discussed addressing some of the oil leaks on this engine. It’s a low mileage car with signs that this engine may never have been apart. The oil pressure and power seem fine, but some of the original gaskets are just not sealing anymore. There are leaks in the front of the engine and also in the back, but the front ones would need an engine out to seal, so we decided to address the rear leaking first which started with the rear main seal. On GTCs, this required sliding the transaxle back to remove the clutch and flywheel.

I could tell someone had been in here once before to try and stop some of the leaking. Not only was the rear main seal leaking, but oil was dripping past the rear main bearing cap. There’s a large o-ring that seals the upper oil pan to the block that looks like is leaking and someone tried to seal it with RTV. I was able to pull the loose RTV out by hand so it wasn’t doing it’s job anymore.

Getting this o-ring would also necessitate removing the engine, so the next best option would be to clean this area up as best as possible and reapply RTV. I don’t expect this repair to last for very long, but some of the new RTVs may stem the leaks a little while longer.

With everything back together, I took the GTC out for a final shakedown drive. I had done a lot of work on this car, and I wanted to make sure everything was working properly before booking transport for this car to head back to North Carolina, but the car had other ideas. Before I even left my shop, I noticed fuel dripping out from the back of the car. This car had an aftermarket fuel regulator installed along with an auxiliary fuel pump out back, and fuel was dripping out of the regulator. The car has been with me for a few months, and not a single drop came out of this regulator until now. I put the car back on the lift, removed the fuel regulator to have a closer look.

Upon disassembly, I found the diaphragm brittle and cracked, allowing fuel to leak out of the fuel system. On one hand, I was baffled with the timing on why it chose to fail now when I thought I was finally done with this car, and on another hand, I was glad it happened so I could fix it before the car left. I would have hated to have had this car go all the way back to the owner, only to have a new fuel leak that needed repairs!
Here’s a video of the final drive of the NC GTC.
Thank you to all the people who have contributed to the Annual Pledge drive. This year’s pledge drive is even more important than any of the years before because of a big change coming to my shop next year. I don’t want to leave you all in suspense for too long, but I will be sharing details next week. Your contribution will help me through this big project I’m working on, so I can’t thank you enough.
Some of you have asked me to post my mailing address for contributions, TOMYANG.NET LLC, PO Box 36, Hollowville, NY 12530. Thanks!
I also would like to thank those who took the time to email and let me know they’re out there and still reading the blog. This website and blog has always been to share my life in cars and Vintage Ferraris, and I’ve enjoyed being a part of your internet life, so it’s nice to hear it directly from followers. Some of you have told me you don’t go directly to YouTube to see the videos, and click on the links only when I provide them here. I’ll try to do it more often, but sometimes the content does not coincide on the same timeline. The ebb and flow of content creation for the videos and blog posts don’t often match up, so the content I post to one may not make sense to link to the blog. Since I’ve made concerted effort to create videos on YouTube a few years ago, I have now created a catalog of over a hundred videos with the hopes to post a new one every week. I apologize if that reflects in less blog posts here to this website, but that is not because there is less Ferrari Content, but but more if you subscribe to YouTube!
Thank you for consuming my Vintage Ferrari Content in whatever medium you choose, and look forward to more “stuff” in the future!







































