Good afternoon,

Any tips on changing the hoses on a 1996 XJS; particularly the one running from behind the water pump that runs under the intake manifold? I've seen one post where the fellow just removed the intake and I'd rather not do that but it looks like a bear to change otherwise. Would like to hear from someone who has replaced that hose. Any other tips regarding changing the hoses and flushing the system would be appreciated.

Thanks, Mitch

 

I’d be interested in tips for the AJ16 engine as well.

I was lucky enough to change the ******* hose out when I replaced the intake manifold gaskets, but all other hoses are likely original.

 

Replaced that hose on my XJR, just remove the manifold and be done with it.

 

It is downright easy once the manifold is off! While you're at it, replace whatever else suits you. Namely, the two coolant pipe gaskets!! {EDIT: Part# EAC9745} ... Easy. I also put in a starter and repaired a section of heater take-off hose. You might do the lower hose or the oil sender gasket too. I think the most difficult part was removing the wiper mechanism to get clearance. No need to disconnect the harness to the coils or injectors, leave all that connected to the intake manifold and runner. You'll get a new intake manifold gasket installed then. A good cleaning might be in order down there too!

The Dayco part # for the bypass hose is 71666. Also called the DEVIL hose.

There is information in the X300 section about doing this job without manifold removal. Access is a real devil.

 

I found no need to remove the manifold, but I did remove the air cleaner, airflow sensor, and some sort of plastic pump looking thing above the alternator to get at the back of the water pump.

I’ve done this twice now... once when the hose burst, and then more recently when the water pump started leaking (190000 miles!). The second time was made much easier to remove because the first time I’d used radiator hose grease on all connections. AutoZone sells it in little packets labeled as radiator hose grease, or you can get a tube of it but it’s labeled AGS Sil-Glyde Brake Lubricant. Same stuff though, just a rubber safe silicon grease. Keeps the hoses from getting stuck on. Also makes them simpler to push on.

 

I looked that part up, and it doesn't appear to be used on the AJ16 engines, just the 5.3 and 6.0 v12 engines...but your pictures look like you have the 6 cylinder....are you sure you gave us the right part number?

Thanks.

 

Thank you for this information! I happen to already have a tube of this! I rarely use it because brake pads (that I seem to buy) always come with a little packet of lube! I never knew that I could use this for hoses...this is very useful for me. Thank you.

 

My apologies. The correct gasket part number is EAC9745. I corrected my original post. Those pictures are from my AJ16 Vanden Plas. The setup of the AJ16 XJS is a bit different but the water rail and gaskets are the same. Thanks for pointing this out. It will be interesting to discover all the differences when I become an XJS owner someday!

AJ16 XJS water rail, pipes and such: