this is the rear passenger side valve cover 03 S-type
can anyone tell if its the vavle cover leaking or IMT o-ring leaking

 

Sure appears to be the lower IMT. Easy check, wipe off lower IMT and manifold. Drive a day or so and wipe again with clean rag. If theres oil B I N G O.

 

Im going to clean it right now

 

Having just done this job two days ago, I agree with Rick. Sure looks like it's IMT O-ring change time for you....

 

Here are some pictures of it clean.

 

Don't forget to clean under the IMT valve as well!

BTW how many miles are on your '03 S Type?

 

67,000 miles

 

bad pictures, most likey its the IMT valve seals are starting to fail. if they fail you'll have a vacuum leak. but yea i recommend clean it off can drive 2-3 days and recheck the leak

 

what area sould i start looking for the vacuum leak

 

I think he said the IMT valve seals (O rings) will be the cause. Just replace them as Jon89 and others have.

 

Yep, at 67,000 miles on a 2003 model, you can bet that your IMT O-rings are leaking. Just get two of the new-style green ones at your local dealership (should be less than $5 total), read up on the threads here on the forum, and go for it....

The Jaguar parts department guys sell so many of these IMT O-rings, they know the part number by heart when you describe what you need. That just shows you how common this failure is in these cars....

 

I Just finished them today