Apr 7, 2025 · 🔧 Project Log: 1989 Jaguar XJS V12 Convertible — Engine Bay Cleanup & System Upgrades I recently picked up a beautifully preserved 1989 Jaguar XJS V12 Convertible. While it …

Oct 21, 2025 · For discussing the Jaguar V12 engine, found in many different Jaguar models.

Jul 2, 2023 · From several recent posts I believe many on this forum have incredible knowledge and experience with Jag v12s. I acquired a 73 e-type 2 years ago and I really love many aspects of the …

May 26, 2016 · I have read lots of threads and posts on performance upgrades on the V12, and all of them seem to have spun off on tangents at some point regarding 4-valve heads, mixing HE block …

Jun 1, 2016 · Jag-lovers: Serving the Jaguar Enthusiast Community since 1993! [v12-engine] Correct way to time a Series 3 V 12 V12-Engine 4.8k views 4 links 6 users May 2016 1 / 6

Nov 12, 2019 · Hi all im a newbie here and live in the uk. I recently acquired a 1978 xjs which was running very badly and obviously not on 12 cylinders. I have owned v12 jags in the past but dnt have …

Dec 9, 2017 · The Jaguar V12 was H.E. from 1981 on until it ceased production. However, the combustion chamber changed shape slightly with the 6.0, evidently to adjust compression ratio. I …

Feb 7, 2020 · Each head weighs less than the equivalent XK 6-cyl head and certainly less than the original Jaguar prototype quad-cam V12 head . Please bear with me John while I find some to weigh …

Sep 7, 2020 · Jag-lovers: Serving the Jaguar Enthusiast Community since 1993! Turbocharging a V12 V12-Engine 3.9k views 2 links 7 Sep 2020 1 / 14

Apr 11, 2006 · The Jaguar 5.3 litre V12 weighs 680 pounds, fully dressed. The Jaguar 6.0 litre V12 weighs 680 pounds, fully dressed. A Ferrari V12 engine, of similar size, with what we would consider …