Ive seen him mentioned a few times here and originally found out about him from the YouTube channel Living with a Classic. Here is a list of the upgrades he has/does for the xjs




Jonas

 

I suggest your first things to do are:
1. Pull the hood and radiator cover and then clean between the radiator and condenser
2. New 8mm plug wires
3. New fluids all around, including a complete brake line flush
4. Pull the distributor cap and check the 'thingy' to makes sure it is springy. Oil the center shaft.
5. replace fuel filter and clean sump tank and filter
6. replace all rubber fuel lines under hood

 

Done all that except the distributor part. It’s doing just fine for now but waiting to visit my dad or when he gets a chance to come up to pull it since he has lots of experience with them and I’ve never pulled one

 

I have 90% of his upgrades, he even rebuilt my AAV, it is quality stuff he provides too. Some of the upgrades however do require significant 'intrusion' in one case it is engine out to do things correctly (rear banjo bolts on oil feeds), the half moons require the cam covers off and that means manifolds off also, so they aren't 5 minute fixes, the taller banjo for the top of the radiator and timing chain plug are simple jobs but if your timing plug isn't leaking I'd leave it alone. My AAV was gone for a month. I already had new seals etc for the injection from MrInjector so I can't comment on his injection stuff, my cooling system is based on Revotec parts and Comex fans so can't comment on that part of what he does either.

 

you don’t need to pull the distributor, just remove the cap. Then with clean hands turn the rotor and make sure it springs back smoothly. (If it doesn’t then is when you remove the distributor.)
Then remove the rotor and put a few drops of oil in the center of the rotor. (It will have cotton to gradually release the oil).