my car has been making a weird whining noise on cold startup. I popped the hood this morning to check the PS fluid because i assumed it leaked and ran out...this isn't what it was. Still dont know.

Either way I noticed the pipes that go to the engine after the thermostats were leaking, just dripping. all of them lol.

It was just another thing i rolled my eyes at. Honestly its a wonder I haven't needed to replaced them until now.


anyhoo WHAT are they called?? No idea how to look the part up.


thanks

 

Here ya go.

Pipes = C42595 = 2
Seals = C37990 = 4 (Jag call them a bush???)
Gaskets = EBC9634 = 8 (under the housings that must come off)

Top job, NOT.

Enjoy

 

Do you mean these?



If so, the seal each end is called a top hat seal, and the part number is:
C37990


The pipe itself may be rusted too, part number C42595

Jaguar Classic parts have great exploded diagrams for this sort of search:

Genuine Jaguar Parts and Jaguar Accessories for Classic Jaguars from Jaguar Classic Parts UK

Greg

 

yes, the blue pipe. Right where it mates to the housings on each end it leaks.

grant what gaskets are you talking about?

 

By a miracle of coincidence Grant and I replied at the same millisecond to your original post, his reply was not there when I started mine! I am not Grant, but he is asleep right now! They are the gaskets under the water manifolds each end of the pipe (the one at the front holds the thermostat). These manifolds take the water out of the head and into the pipe/front water manifold and out to the rad. They are easy to undo but need new gaskets when refitted to the head.

If you look it up in the link I sent, you will see it all in the exploded diagram.

Greg

 

thanks greg. I see where the leaking part is im speaking of the "bush" but i don't see 8 gaskets....I can see where there is one at the back of each side but the illustration makes it seem like its just mounted on the front section and nothing more.

Do you know how those pipes come off the manifold to replace the bush? I can't tell from the image. Are they threaded or work more like the "bush" on the top of the master cylinder

 

I wasnt asleep, but toooooo many Whisky's had the keyboard kinda fuzzy.

The "housings, FRONT and REAR should be removed to do this task PROPERLY.

The tubes "push in" to each housing, and the ridges inside those housing that the seals actually "seal on" have a bad habit of corroding, especially those that have leaked for a while, and have been on the "to do list" too long.

Each housing has 2 gaskets TRUST ME, and 4 housings = 8 gaskets.

STRONG SUGGESTION.

Get some of those bolts also, they snap. They grow to the cylinder head, whatever, and they cause grief. Mine were 8mm 1.25 pitch, some a Imperial, its a Jag thing about '85ish.

I have heard of people actually "sliding" the pipes into one housing, fit the new seal, slide it back into the other one, fit that seal, slide it central, done. I have never been so lucky, those pipes are soooooo thin they simply crumble.

It is one of those tasks you really only want to do ONCE, so I always do the job totally, and forget them for another 15+ years. Takes about a good day, plus the broken bolt drilling and tapping if required.

 

The casting that the end of the pipe fits into using the top hat seal (called the water manifold) is bolted to the head by 4 bolts. There are two passages in each casting. Each passage has a gasket between the casting and the head. Two per casting, four per side, eight per engine!

Part number 14 on the attached link:

Thermostat and Water Pipe-Lh-5.3 Litre - Parts for XJS from (V)139052 to (V)179736 | Jaguar Classic Parts UK

Greg

ps Sorry to assume you were asleep Grant, I assumed it was bedtime in your timezone! Should have known it was the medecine!

 

Greg, it was sleep time, but you know "just one more" HAHAHA.

Paid for it today, had a PreHE V10 to sort, took 3 hours to find 2 ferrite rods missing from the dizzy plastic wheel, should have picked that in 30 seconds its soooooo common. Glad I got spare broken wheels.

8pm now, so a "hair of the dog" is required.