Hey,

Currently swapping a good engine from a fairly rusty Jaguar X308 to a nice Racing Green Jaguar X308 with a broken chain (the 'one of the pistons no longer exists...' kinda story).

Now I see 1 clear difference on both engines and I wondered what this is and what it is for?
Its located on the upper oil pan.
My current Jaguar does not have this, the defective engine does not have this and the 3 engines that I have disassembled in the past I did not notice this either.

 

Yes, that is an oil cooler bypass. Before that goes in the car, I would highly suggest cleaning that mess up, taking that bypass and two metal pipes behind it off the engine and replacing all 4 orings with new ones. As you can tell, they leak oil.

 

yea that’s a structural sump from a supercharged car. weird rest of world stuff

 

Xalty, I have seen only like 3 or 4 NA USA X308’s with that bypass and they were original engine cars. No rhyme or reason.

 

Ah so that's what those bypass fittings looked like, I assumed they were a vestige on the parts diagram, left over from some x300 transition period... Maybe from the very early '98MY cars? All the NA X308 blocks I'd seen online had them blanked off in casting. Could have used that bypass when my oil cooler line blew

 

The part indeed consists of a pipe that looks like a half moon (the front) and 2 separate pipes with leaking rubbers.

Went to a number of auto parts stores today for these o-rings (square sides) but no one has them.
Now looking for a partnumber or a set of these flat o-rings (different sizes).

Thanks for the information

 

You might have better luck at ACE Hardware. They’re just o rings.

 

Hi,

I bought 10 new NBR 70 Shore A O-rings.

For those who want to know:
19x3 NBR 70 Shore A

The 19mm is the inner diameter and the 3mm is the thickness of the O-ring.

My reason for NBR was because it can withstand up to 120 degrees Celsius. This is more than enough for engine oil (normally 100-107 degrees Celsius).
This type of rubber is ideally suited for use with oils, greases, lubricants and a number of diluted acids.

You can replace them when the engine is in the car without disassembling anything else. But because this was my 4th time (first the wrong size, then the wrong type of rubber and the last time I think I didn't clean it properly), so for ease of use the radiator was removed. The air conditioning system was already empty (engine swap..) and the radiator was filled with water so it with a little effort, I could now reach it very well and clean it correctly.

Thanks