Greetings, I have bought a 2002 Jaguar xjr i have been the owner for 3 months now and enjoy every second. I have had a recent issue where I have a low oil pressure light come on and on off while I am driving, I know something bad went wrong. Pulled over let her cool down and took her home. Just today I was able to diagnose the issue I was having assumed oil pump, pickup, or anything along those lines. Drained the oil, Dropped the pan and started to investigate i instantly seen in the pan that there was a small shard of metal, then moved to the pickup screen and seen the small shards that are shown in the photo. I am not sure where the shards came from but possibly the shards blocked the screen causing the low oil pressure or the damaged part itself could have caused it? I look forward into repairing it at any cost.

Metal shavings and two plastic pieces.

Please give me some feedback anything is very much appreciated. Cheers!

 

Welcome Kutthroat, kind of sucks to come here for an answer for this.

You did the smart thing and dropped the pan, did you run your finger around the inside of the pickup as well? There is obviously appears to be metal to metal action going on.

I would suggest you take off the cam covers and inspect the timing chain area to include the chains and the inside of the cam covers. If the chain is loose, perhaps from a failed tensioner and/or guide, it may have slopped up and nicked the cam or guide cover. Its possible it could simply be from the tensioner itself and/or a worn through guide? The plastic looking piece makes it seem to be the latter.

Are those aluminum pieces? Simply take a magnet to them.

 

Alright so I removed the cam covers and inspected the area, everything looks fine to me I added some photos to receive feedback. I also ran a magnet over the shavings sand the magnet did not pick them up. The pick up was actually clogged with the a majority of the shavings shown, so I went ahead and cleaned it. Could that have been my low oil pressure light reacting to this clog? I also went ahead and got a new oil pressure switch and replaced since it was next to the filter.I feel like this might be a major component but I am unsure.

Driver side

Also driver side

Passenger side Cams

Passenger side also

 

Ok, so your upper 2ndary tensioners look to have been replaced with metal cased ones. But, I'm not sure about the one guide in the last pic....is that a crack by the retention bolt or just a mold flaw?
Are your chains fairly tight on the sprockets?

Overall, it appears your tensioners may have already been done, its pretty clean looking. I am guessing that when they did them, they didn't drop the pan as you did and clean out the pickup.

The only other suggestion may be to run a bore scope down the primaries to verify all is good. As for the loss of oil pressure, I'd say it was the material clogging the pickup. Not a bad idea to replace the oil sending unit.

 

No crack and all chains are tight. Filled up the engine with oil and cranked it over but didn’t hear a knock until 2 minutes later. Im leaning towards rod knock at this point. Oil pressure light stood on. Gonna be a hassle but worth it,but don’t just wanna jump ahead.
Oil pressure related components?
I stand unsure.
Any other suggestions you may have on the cause of this will be greatly appreciated.

 

your car has a factory morse chain. everything there is good


looks like something important kicked the bucket

 

What is this in the area I have circled. It looks like a piece is broken off or missing. I have an engine at my shop. I will look to see what it could possibly be.

It also looks like fine particles on the sprocket on the passenger side.

 

Kind of odd that have a rod knock a couple minutes after start up? Not saying its not a bearing, ..but that tends to be a constant thing (especially at cold start) and I don't know any bottom end components that are non ferrous? I mean other than the copper alloy that bearings are made of.
Have you taken the oil filter off and examined it for any particles?

Xalty, do you think the pump itself may possibly have given up the ghost? Thus his light indicator and the knock that comes in later, perhaps from not being able to hold pressure after warm up?

 

It should be a flat surface under the guide. It looks like a piece has broken off. I don't know how in the hell that could happen. It is also near where the VVT sits on a N/A car. There are oil passages in this area and if it opened one of those it might cause a reduction in oil pressure. If you think I might be right take the cam cover off and inspect this area more closely. If it is damaged there it will probably mean a new head on that bank.

 

BobRoy...I didn't see where you posted before me until I came back here later or I would of included you in the inquiry about the oil pump.

Good eye on that flange, that looks fresh as well....that might explain the particles.
Do you have an opinion on the milled filings in his pan?

 

It is just speculation but when that piece came off it could of gotten behind the chain and scrapped the block on the way down. It could still be wedged somewhere. I think take the cam cover off and if the head is toast it is up to Kutthroat if he wants to repair this engine or find a replacement. I would lean towards a replacement since you have shards of metal in the sump and if any of that reached the bearings the life of the engine maybe cut short.

 

Went back to the passenger side to inspect if it was a crack and it turns out it wasn’t. The cams look fine no drastic wear. But I did notice on every single top of the piston it had carbon build up but along with the spark plugs there was no oil on them but as they were unscrewed there was minor sludge on the outer ring where plug would sit. I feel like I should remove both heads to inspect them and go from there. Anyone else agree or is there another place I should Inspect.


Sludge surrounding spark plug hole

 

Thanks for the better picture. Do a compresion or leak down test before you take
the heads off. It will point out if you have a particular cylinder causing the problem. Take the timing cover off to see if there are any issue with the guides. The only place I can think of that has plastic, you plastic pieces in your pan, are the guides and the secondary tensioners.

 

I will be doing that soon. I got another reference for you guys. I found a video on YouTube on the exact same sound on my jag it is honestly spot on. The guy said it was his supercharger?!

Channel/Video

 

The sludge around the plug hole is common, this means your gaskets have reached their life's end. Gasket sets for the cam covers are fairly inexpensive.

This one you mean, that sounds like the isolator is gone? If your going to rebuild it, be sure to get one of these OEM... https://www.ebay.com/itm/113841866230 ...not the green or other colored knock off ones.

 

you can check if it’s supercharger noise just by taking the belt off

couplers break all the time

 

Curious thing i found exactly same piece of metal as one in the middle of the first photo, shaving or two and plenty of plastic debris, while plastic is obvious to come from tensioners, piece of metal have me perplexed especially now that i see it in your sump too, thingy was thin brittle and non ferrous if i recall correctly, it doesn't fit much into anything tensioner related unless something shaved this bit off the timing cover or similar place in the moment of failure