To piggyback onto this, please could I have a couple of opinions on this so I'm not going into discussions with the garage blind?

https://drive.google.com/file/d/1YkV...ew?usp=sharing

This is a 2010 XFR with 99k miles. Sounds like a bag of spanners!

From what I can gather there are 4 likely causes, in order of severity:
1) Injectors (I can only pray)
2) High pressure fuel pumps
3) Supercharger bearing
4) Cam chain tensioners

Is this a decent summary? If it's the last one I may as well scrap the bloody thing as I'm not willing to put £2-3k into stripping it down to replace the tensioners and chains (UK) only to risk finding a further damage like bits of alu in the oil or that the cam shaft seats have worn wrong.

I love this car but it's only worth £8-9k!

 

I can't seem to edit posts, but I wanted to follow up with a question - how hard is it for a competent DIYer to remove the supercharger belt? Is there a guide anywhere, as I can't find one?

Many thanks for your time!

 

Pretty easy to remove the supercharger belt: remove the air intake piping and then get a 3/8" breaker bar on the tensioner and move it away so you have enough slack to get the belt off the supercharger drive pulley.

More concerning is the noise from your engine. The high-pressure fuel injection noise is there for sure but it's definitely more bag-of-spanners than it should be and I'm pretty sure I can hear a knock that shouldn't be there. How's your oil level?

 

I borrowed a belt tensioner wrench from Autozone. Makes it easy...

https://www.google.com/search?q=belt...hrome&ie=UTF-8

 

Thanks, yes the oil level is showing as fine. If you think that's an engine sound there's not much point my removing the SC belt. I'll get it straight to a dealer to check it over.

 

I would suggest you check it out before agreeing to JLR service to fix anything, they are know to make stuff up when they don;t know the answer

 

Yeah at the very least eliminate the supercharger by idling it with the belt off before you take it to the dealer.

Also try to narrow down the biggest source of noise. If you put a large flatblade screwdriver on the high-pressure fuel pipe that goes over the engine and then stick the end against your ear you'll hear a loud clicking - this is the high pressure fuel injection system running. Anything else - especially something that isn't the same frequency or rhythm - is likely not coming from there, so you can use the screwdriver + ear technique to try and narrow it down just a bit, or even just see if you can hear noises from the engine under the car etc.

 

Confirmed - it's timing chain and tensioners. Getting some estimates from independents. I'm not a happy bunny! What else should be changed while this work's being done? I've seen some mention of injectors?

It also looks like I can get Land Rover parts cheaper than Jag parts: has anyone done this? Thanks!

 

Sorry to hear about your timing chain, but the good news is that you found about it before it jumped. It makes sense to also replace chain guides at the same time.

 

First quote was undecided but they warned me the last one they did cost £12k...unfortunately the sprockets had all been damaged too.

If my check engine light hasn’t come on do I have a good chance of getting away with this or is it a complete unknown?

 

Do you think a 2014 XKR engine would be a straight swap or will the looms be very different? There's a 19k miler in a scrapyard near me...

 

Looms will definitely be different - 2010 runs a Denso ECU and the 2014 will be running a Bosch - however, you should be able to strip the entire loom off the donor engine and fit yours to it. While the ECU is different as far as I know it uses the same sensors in the same places, so the plan would be to retain your ECU and entire loom and fit to the donor engine. Changing the loom out is a big job but then pulling the engine is, so....

 

How much (just curious) Best I've seen was 5,500

 

Wow, is that what you can get the supercharged engines for now? When my engine lunched itself I couldn't find them for double that, hence why I rebuilt it.

Still, add the cost of timing parts (using LR part numbers rather than Jaguar as they're cheaper) along with an oil pump onto any purchase price to be safe and you're still winning at that price compared to a couple of years ago.

 

Yeah, I've seen a couple now under 10K

 

It's about £6k, so similar ballpark.

From my understanding the tensioner design was changed and the spot where the piston strikes it was strengthened in 2013 - is there any way to confirm that this is the case? A 2014 engine would probably not need the tensioners and chains replacing on that basis I assume? Could be my cheapest option.

 

I thought I'd better fill in the detail for future thread searchers. My timing chains were loose so those, the tensioners, and the guides are being replaced. My SC pulley is also loose (c.100k miles), so the garage wants to replace that too!

Thanks to the lockdown the garage that's stripped it down can no longer get the parts to re-assemble so my poor cat is stuck for now.

What else should we replace while it's apart? They've suggested:
- Water pump (£500 for the new Jaguar pump sound reasonable?)
- Supercharger pulley (does the whole pulley need to be replaced or is there an easy rebuild option?)
- Chains, tensioners, etc.

I've read about front crossover pipes bursting regularly (outlet pipe?) - is that a simple and cheap fix while the front of the engine is already apart and the pump is off?
Should I also ask them to clean out the inlet thoroughly? I've seen some pretty grim photos online and wonder whether I might be down on power. Car feels fast, but it's my only Jag so I have no point of comparison.

I just really want a reliable car for the next X years and miles.

Many thanks once again for your help!

 

I would be cautious about throwing lots of money and time at parts replacement - doesn't guarantee reliability and you could spend a lot. Just my view - if water pump isn't leaking I'd leave it - it's a pretty straightforward fix if it does leak in the future. Not sure about SC pulley and why that needs replacing. The one area I'd focus is all the plastic piping in the cooling system. They age and will ultimately fail so a proactive replacement of them while system is apart anyway seems pretty sensible. See other posts on here for what parts to change.

 

Thanks, that's a good point. It could fail elsewhere! My thinking was that the garage said they'd replace the pump and s/c pulley for £0 labour given they're already off.

The S/C pulley is because it's loose and rattles - apparently Jaguar only sells the whole snout so it all needs to be replaced. I'm going to ask the garage to send the snout/coupler for rebuild instead: https://www.ebay.co.uk/itm/Jaguar-XF...0/163146237243

 

That's a bit high for a water pump. I got a genuine one on ebay (seller does not have one now ) for $135. Saw this on US-eBay but look around.https://www.ebay.com/itm/For-Water-P...8AAOSwGHJafaD6

I woudl get it changed if its free labor and if you could get a cheaper genuine Jaguar one. the newer version is more robust ( unless it has been changed already)