Greetings I’ve had my failed supercharged v8 from quite sometime and was finally able to get all replacement parts for timing. The issues was a knocking sound after a low oil pressure light. I’ve inspected timing components and they look fine to me as they are the upgraded metal components. Now I was able to get to the rod bearings but have no idea what the issue could be. I’ve provided photos to help. Any suggestions are greatly appreciated. Thank you all.

 

Turns out pretty much all the bearings spun because the motor was starved of oil.
these bearings are cooked.

 

Likely the crankshaft journal is damaged also?

Do you have a copy of my Jaguar Engine Training Course 168 that I had converted from a paper document to .pdf?
Jaguar also had a Training Course 180 but that one is V8 only. (updated to 168 when the V6 was issued)

Either one will give you the info you need. GUS will have the 168 on his site (I sent it to him) but I never had the 180 converted to .pdf so unless someone else did it, the only version on the internet is my copy converted.

All the info is on the side of the block as far as main and rod sizes in the selection matrix.

You have that MORSE STYLE primary setup so that is a plus.
You might want to 'plastigauge' to check the clearances?

 

I don’t can you send the link? By any chance do you know what rod bearings I need jaguar tells me it’s the blue one for 2000-2003.

 

Prior to ordering rod bearings, which are worn, inspect the crankshaft journals for pitting if the rod bearing started to spin.

You should also pull the main bearing caps and inspect them for failure or excessive wear as well.

Here is a link to the 168 Engine Course:

https://www.dropbox.com/s/vqpy3bbjzd...e_168.pdf?dl=0

 

What Jaguar told you may not be correct. You need to read the letters for the rod (big end) bearings stamped at the side of the engine block. Example:*KMJKE*BBAB*
*22222322*GJHKJ*

The *BBAB* means (engine front to back):
B Green
B Green
A Blue
B Green

You can use the factory specified rod bearings only if the crankshaft journals are undamaged and not worn to below the spec.

 

It may be completely obvious but you'll want to investigate the cause for the low oil light. Too much bearing clearance can cause low oil pressure as can worn oil pumps or even something as simple as low oil level.
No need to replace anything until you find the cause and address it though (IMHO).
One thing I noted from your pictures is how clean everything is in the timing area, it looks like an engine that saw regular oil changes (a guess on my part).
Good luck.

 

The reason for the oil pressure was that the oil pick up was clogged with debris heavily. I’m thinking since the pickup was clogged it basically starved the motor of oil and messed up the bearings. On my block these were the letters stamped on.

 

I had the same thing happen on my 540i beemer.
The debris was from the timing chain guides falling apart.
The pan was full of debris.
Since you have updated secondary tensioners maybe the pan and pickup were never checked when the new timing components were put in.
The cams have bearing surfaces that wouldn't like running dry (or even low) so you might want to check there as well...

 

The 2002 MY cars had Morse-style chains/guides from the factory.

 

I wonder where the debris in the pickup came from then...

 

After ordering multiple bearings for my xjr I finally came across the right ones. The part number is AJ83903. It turns out the color code for the bearings are green.

 

According to the stamping on your block *BBBA*, you need:
B Green
B Green
B Green
A Blue
(Front to back of the engine)

 

I just noticed that 🕷 below (or above depending on how you look at it) the bearing colors on the block.

 

You mean this one?



I got this bee inspecting my camshaft as I was replacing the plug:



It left when it realised that what was there was not honey.

 

That’s funny M! Should start a new thread: What visited your X308 today. Yes, I know your bottom photo isn’t an X308, just sayin.