I have a 2000 XJ8 with 130k miles. Motor overheated and it dropped at least 1 valve seat as per my analysis. Question is. Should all seats be replace or just the bad one, or maybe 2. Since I have to pull 1 head, I will just pull both, which leads me to the next question. Back in the day, valve jobs were easy and straight forward. I m replacing the chains and guides as well. From the opinion of experienced Jaguar enthusiasts, should I pull both heads or just fix the 1 seat and have a beer. Any response is well appreciated. Ordered the tools and parts, so I have time to ponder

Thanks for the quick replies. I'm leaning to do both heads and chains. I'll check the block deck for straightness and the bores visually, any problems there, I'll be heading to the bone yard. Thanks again

Thanks for the replies before I dug into it. Pulled heads and replaced all seats. $10 each. Put on new chains and tensioners. A few items that being the first time I've gotten that far into the motor. Buy the correct tools,- cam hold down, crank lock and crank balancer puller. Bought online for $380. I destroyed the crank sensor getting it out, the overheat ruined the cam sensors. Throwing lean codes on both banks, I found a vacuum line off and also replaced the MAF sensor. All is good and happy to be driving the baby again. Total cost with valve job, seats, tools, gaskets etc about $1800. Thanks again