Greetings. I think I'm seeing that the Euro Jaguar XJ6's don't have the air pump that ours do in the US. There would be gains in simplicity and some in power with it removed. Is there a downside as far as running condition? I'd like to remove mine and maybe substitute an electric fan to take those belt driven loads off the engine.

 

Lots of owners remove the pump....mostly to clear the clutter but also because the pumps often fail.

Won't harm the way the engine runs to remove the pump, nor improve it.

Realistically the power draw from the pump is so slight you'll likely never feel any difference

Cheers
DD

 

If you operate the vehicle in a jurisdiction that has emissions tests, it will fail the visual test if the pump is removed.

If you do remove the pump, you should also remove the pipes going to the cylinders as well and install plugs into the ports.

 

I removed mine and plugged the ports and have seen no effects on the engine either way, but it does look cleaner. I've seen a couple of conversations about the expense of finding the piping assembly to the cylinders, and i wish i had saved mine to donate to a board member who needed a replacement for emissions testing.

 

I think I could get away with it here. Any tips, studentper, or anyone else who's done it as to belts used, pulleys, ways to plug the holes? I did find some info on Jagbits.

 

AS per the pump's oem, it typically draws about 1 hp.Hardly worth the effort.

 

There are a couple of nice threads--if you search for BPT (since the plugs are 1/8 BPT), you can find them. Some people contributed parts numbers at https://www.jaguarforums.com/forum/x...s3-xj6-136038/ I believe I bought the 1/8 hex nut bpt, because they look pretty. (I bought an extra or two, in case I drop one in the engine somewhere.)

Order the plugs first, so you have them on hand. I just cut the belt and then started unscrewing the pump first and then moved toward the engine taking things apart. I left the bracket on the engine, but I can't recall as to why--whether it's supporting another piece of equipment or the screws into the engine blocked maybe looked intimidating.

It was a fun project, and I like the cleaner look, but I agree it's not dropping my 1/4 mile times.

 

Excellent! Thank you. Every lit bit helps.

 

Does the factory valve seal the rail sufficiently so the engine will run with the pump disconnected?

I'm considering plugging too since the pump on my new XJ6 is frozen (possibly why it was parked) but I would like to get it running in the meantime.

 

The one-way valve will seal the distribution rail, but without the pump operating, the rail is most likely plugged with carbon. It's best to either replace the pump and get the system functioning properly, or remove the distribution rail and plug the ports in the cylinder head.

 

the pump is a GM Delco pump, available at NAPA or CarQuest. So is the Diverter Valve attached to the pump, and the check valve, all GM parts.

my 1984 still has the system intact, I have replaced the pump once in 28 years because it siezed.
Stock as it came from Jaguar.

 

i suspect it seals itself well enough to run until you get around to buying the 1/8 plugs. The piping on mine would constantly come off with no noticeable change in engine performance until i finally scrapped the whole thing.

 

I'll not reveal the name of the guy that removed the GM sourced pump from one or two of his Jaguars. He did it so neatly, that the inspector did not detect it's absence.


Way back when, that GM pump on my IHC Scout II seized. I merely cut the belt. I drove it that way til inspection time. Relatively inexpensive at the local parts store.


Keep your pulley if your replace it. They might be different.


The one from my 83, sans pulley, is in my bits shed. If no one wants it in a few months, it will get tossed. "spring cleaning" .


Carl
.

 

save it for me Carl, asumming it is not seized!!

my car is all original, removing the air pump won't make the engine more efficient, or faster, so I left it alone.

Do you have the Air Rail ?? (the rail that mounts to the cylinder head). I am looking for another one.