Fixing Oil Leaks on My Jaguar XJ40 | Cam Cover Gasket & Half-Moon Seals Replacement (AJ6 Engine)

In this video, I get stuck into replacing the cam cover gasket and half-moon seals on my 1994 Jaguar XJ Sovereign.

If your XJ40 is leaving oil trails, misting the side of the engine, or turning your driveway into an abstract art piece, this repair will help set things right.

Even if you’re not into DIY, this video is a close-up look at what makes these classic Jaguars tick — and occasionally leak.

In this video, you’ll see:
Tools and parts needed for the job
Step-by-step removal of the cam cover
Installation tips for the new gasket and rubber seals
Final verification

🧩 Parts Used:
Jaguar cam cover gasket (for AJ6 engine) - EAC2912
2 * half-moon rubber seals - C30431
High-temp RTV sealant (instant gasket)
High temp grease (dielectric)

🔧 Tools Used:
Gasket removal set
Posi-drive and flat head screwdrivers
Reusable plug labels (for cable management & wire organisation)
Reusable rubber bungs

📌 Related Links:
   • Fixing Jaguar XJ40: service including fuel...  
https://www.simplyperformance.com/sho...
https://chatgpt.com/g/g-68138960e1588...

✅Chapters:
00:00 - Introduction
02:42 - Disconnecting the Heater Breather hose and HT cables
04:24 - Removing the cam-cover gasket
06:31 - Removing the Half-moon seals
07:53 - Fitting the new Half-moon seals
08:38 - Preparing the cam-cover surfaces and fitting the new seals
10:34 - Re-fitting the cam-cover
11:13 - Refitting the HT leads and cleaning up
13:55 - Start-up and verification
15:51 - Close-out

👇 Let me know in the comments if your Jaguar XJ has suffered similar leaks — or if you’ve tackled this repair before 👇
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