Guess who's car has just started gushing coolant from the back of the engine!

Well, looks like I'm in for a long weekend, but I intend to replace the Valley hose myself.

Looking on the internet I can find some brilliant guides with parts lists of "recommended replacements", so I am wondering how many of these I should do, adding some lists up comes to around £250, I understand that replacing all of the hoses is a must.

However, I am a bit concerned about the part numbers, my car is one of the earlier Super V8's (Vin ending in G37672) and the part numbers seem to be for the VIN over (G4****), does anyone have a list of part numbers that would be compatible with my car?

 

I don't want to put you off, but the author of a recent article in the JEC magazine who tried to replace this pipe finally gave up and handed the car over the experts ! It is apparently not an easy job !

 

That's interesting, do you know what month magazine the article was in?

 

Chris @ The Jag Specialist did mine last month, it came to under £500 all in. Yes it is a horrible job to do, I didn't fancy doing it myself in the cold. Plenty of how-to on the forum.

 

£500 is on the very low side for that kind of job, you're lucky!

 

Identifying all the hoses is a challenge, because their names are not always helpful and they appear on multiple pages of the parts catalog, so you may want to seek the assistance of a Jaguar dealer parts counter rep to help ensure that you get them all.

You can download and install the Jaguar Electronic Parts Catalog (EPC) from the thread at this link:

Full Jaguar EPC Download & Installation Instructions

You can also look up parts diagrams and part numbers at jaguarmerriamparts.com and gaudinjaguarparts.com, two Jaguar dealers who sell parts at discount prices online, as well as at SNG Barratt, an independent Jaguar specialist and one of the Jaguar Forums sponsors.

Cheers,

Don

 

Here are my notes. Lot of work for the weekend, especially to clean it up. Will almost certainly have to repair the brake vacuum connection.
https://www.jaguarforums.com/forum/xj-xj6-xj8-xjr-x350-x358-28/journey-into-valley-134108/

 

its not too hard of a job . i thort it was simple / methodical , but quite hard on your back .and fairly fiddly , and required a substantial tool selection .
not knowing were your from its hard to say how cold it gets were you are . here our climate does not require TB heating and i bypassed my egr so no longer requires cooling , so did not see the need for the pipe and blanked it on mine . as posted above the hard part is the cleaning especially.
inside the charge coolers . one afternoon to disassemble . a whole day cleaning parts in my case and an arvo to reassemble . and an hour of coolant bleeding and checking .
although i done the work my self , i also agree $500 is cheep although i think thats like $1000nzd in that case pleased i done it . for sure do the brake booster pipe seal at the back . enjoy

 

Definitely a lot of work - allow plenty of time (£500 is about US $625 and cheap for the job).

It's the same job on an STR and some guys posted parts info a while back:
thermostat AJ8 6484
seal-thermostat NCA2246BA
antifreeze red JLM 20972/3
gasket AJ8 3445
hose-heater AJ8 9746 (this is the one under SC)
aka Throttle Body Coolant Return Hose
aka Valley Coolant Hose
seal-water O C2C 11477 *2
aka C2C11477 water outlet seal *2
gasket AJ8 3292
seal-outlet NCC7735BA
seal-duct AJ8 6892 *2
plug-blankin XR8 2652 *7

also:
http://www.jaguarforums.com/forum/at...7&d=1278544061

 

Thanks for the replies everyone

I've emailed barrats to enquire about the parts, I've decided to go with the parts from dsetter's journey into the valley and I've set aside a few days next week to do the job

I'll update when I get a reply from barrats

 

Look into getting new bolts for those hard to reach places such as the egr, throttle body and L shaped intake from throttle body to supercharger. These bolts can be easily get rounded. I know from experience. The egr and throttle bolts are the same and can be had at local hardware. The L tube not so much.

 

I second what BlackKat suggests especially the egr bolts.

 

Day one of the valley hose job observations

1. It's hard
It really is, it's hard to put into words the scale of the job, everything seems to be in awkward places and and your bound to get bolts that just won't budge

2. Speaking of which...
Every bolt on the thermostat housing was stripped, so let's just say, a new thermostat housing is on order...

3. The plastic bulkhead is a disintegrating wall of frustration.
The bulkhead would not come out, too many hidden clips and the insulation desintergrates and covers the engine in insulation...

In terms of time, we've been working for 6 hours and have just removed the throttle body and we'll be removing the supercharger soon.

 

Thank you for the (hard) feedback.
Would be nice if you could document the difficult steps and take pics.

 

A lot of bolts are in difficult places (which is a lot of the difficulty) so pictures wouldn't be easy to take, I used a combination of the guide made by dsetter on this forum and the jaguar workshop manual, which contained very useful diagrams.
In terms of the most difficult parts, the thermostat housing bolts were in bad places and were stripped for me, hence a new thermostat on order, the rear bulkhead wouldn't budge and eventually we just left it in place, a lot of things are trivial and require a bit of thinking to get through

 

First time I tackled my super charger I had to walk away from the job several times to rethink my approach.

Even with help from this forum it was difficult. However now that I have taken it out and put it back 3 times it is not that bad of a job.

I know what I have to move and what I do not and I know the specific tools I need.

I just hope I do not have to do it again!

 

I'd like to suggest a tip that has so far worked well for me. When I removed everything and replaced the valley hose, before putting everything back on I put a sheet aluminized kevlar insulation under the valley hose in order to protect the hose and supercharger from the heat the block radiates.

I bought this at advanced auto parts for cheap. It should extend the life of the hose.

​​​​​​​Also, if you have never replaced your knock sensors, you should really consider it while everything is off. If they go out, you will end up having to strip everything off again to access them.

 

There is a thick wad of encapsulated insulation under my super charger anyway.

The valley hose has a cut out on its underside.

Jaguar added the insulation to protect, somewhat, the SC from engine radiated heat but did not seem to think it necessary to insulate the hose itself.

 

Jaguar added the insulation to protect, somewhat, the SC from engine radiated heat but did not seem to think it necessary to insulate the hose itself.[/QUOTE]

True, my friend. And that's probably so many of us on this thread have experience replacing it. I love Jaguar. But they don't always engineer some of their parts to last as long as they should (ie CATS suspension, original plastic impeller water pumps, plastic thermostat housings on Xj8s, etc)

 

I wonder why in all our combined knowledge we haven't figured out a better replacement for the "engine Killing" valley hose!. Seems like one could solid plumb the line most of the way to the throttle body and use shorter high quality high temp hoses/clamps to connect to the fittings. I'll put this on my list of items to look into on my refresh engine project.