Hoping this knowledgable forum can help with something.

After getting a thorough inspection from a Land Rover dealer, we are buying this '15 LR4 with the 6 cylinder supercharged engine.

The PPI came back very, very clean on this 1 owner car with one exception - there were early indications that the cross coolant pipe (front) was starting to breakdown. To be safe, we had the truck flat bedded to our mechanic who is planning to do the cross coolant pipes front and back.

My question to the forum is this - what other preventative maintenance should I be doing while I have the truck at our mechanic and the supercharger removed for this job?

Thinking thermostat, some fluids changed (power steering and oil) and hopefully we will be on our way.

Would appreciate any advice as I am hoping to own this one a long time.

 

Are you looking at the plastic replacement for the front pipes, or the aluminum ones?

From what I've read - while it's out:

S/C Eaton solid isolator, SC oil, belt if needed. The spring loaded isolator can be a failure point.
Water pump, belt, thermostat, aluminum water pump/oil cooler piece (to replace plastic piece)
PCV valve (easily accessed with everything out)
Check condition of rubber coolant hoses / replace since coolant is drained.
Walnut blast intake valves if there's significant carbon buildup.

There's alot of good info on the Jaguar F type forums, as one variant came with the AJ126 S/C motor. They push their cars much harder, so weak points tend to manifest themselves sooner. All the above was what was recommended for longevity while the front crossover pipes & S/C were out.

 

my supercharger coupler is fine, and I did change the fluid.
There was a specification change from the early engine designs… I thought the coolant pump was upgraded as was the timing chain guides. (Of course, its very difficult to confirm as I haven’t seen one technical overview document or an updated workshop manual from Land Rover. I have them all from Jaguar.)
But in addition to changing ALL fluids and filters also change the PCV valve, and all of those coolant hoses.
I concur, I’d like to see a preventative solution to the walnut blasting need. (and need to change/clean the pcv valve). Other than frequent oil changes… has anyone installed a catch can? Does it help?

As it has been shared… you need to pay, to play.

 

Here's a thread on the Jag forums on the AJ133 chains/tensioners. Not sure how much applies to the AJ126 but theres very good info in there.
https://www.jaguarforums.com/forum/x...issues-269088/

I know a catch can on the partial load side will definitely help. Check out all this oil in the SC:
I'm going to be installing a Provent 200 catch can on my D5 based on previous platforms I've owned & that video.

 

I had not seen or read anything on the walnut blasting of the intake valves and I have done a ton of pre-research.

I am going to add the S/C belt, oil, water pump to my list.

@462disco I tired to reply yesterday and thought it posted - thanks for your responses. Curious, are you saying replace the water pump with an aluminum water pump or those are two different things?

Mechanic also thinks the lower control arms are starting to 'clunk' so that is fun. Love that I paid a Land Rover dealer $240 to inspect this thing and not only did they miss the control arms, but they also have failed to send me a written report for two weeks. Amazing.

 

Walnut blasting is inherent with DI engines, some need it more than others. It's easy for you / your mechanic to take a look when removing the SC, you'll immediately know if you need it or not.

This is the other aluminum piece I was referring to: It's the connector piece between the water pump and oil cooler.

 

I had it done. At 140,000 km (~85,000 mi), just…
changed the PCV valve,
had the walnut blasting,
oil change,
new pirelli scorpion ATs,
and an alignment.
Just because, had a fuel cleaning service. I only use Top-Tier fuel. Pretty sure the previous owners hadn’t.
(I had changed ALL fluids and All filters last month. And the water pump, and the air dryer?? for the suspension. brake service, yada yada, yada. He’s happy he got an extra oil change)

Swapped out the previous owners mis deeds:
there was a lead acid battery instead of the AGM. Effect: Little things like start/stop won’t work.
a wrong (cheap, made in… ) TPMS sensor. Effect: Caused the whole TPMS system to disable itself.
cheap LED bulbs in the fog lights. Effect, they were ineffective for lighting. Due to fog, I prefer high intensity yellow bulbs by bosch.

@462disco , thanks for providing that video. I’m with you. Catch cat is on the horizon.

All in all, runs like a charm. Finally. My son took him out to the rocky, hilly, forested back 40 on my brother’s property and was christened with his first Pennsylvania pin stripes. Climbing the hills, over rocks was adequate with the stock off road lift and in transfer case low. But I think johnson 2.5 lift just might happen sooner than later. Easily swapped back and forth whenever the need rises.
Cheers!

 

So far, the crossover pipes here look like a good quality pair. I've read some of the cheaper ones have fitment issues.