I see the XJ fuel filter comes after the fuel pump and the changeover valve. Would it be wise in an older, rusting car to put 2 additional filters ahead of these? I planned on doing this and ordered small (relatively) fuel filters but am afraid they may quickly clog up and stall the car. Maybe instead install 2 stock type filters or is there a filter that just filters the larger sediment that would work?
Or maybe one like this so one could keep an eye on it.

Thoughts?

 

Others have indeed installed these "pre-filters" and report success.
At least one reported that it tool a few of these before the valve, pump and main filter remained clean. In my view, a large victory at a minimal expanse and hassle.


Carl

 

I have a filter before each pump as well as the main one. I will post a picture tonight when I get home.

 

The pre-filter you pictured is likely too small in diameter. The more common fuel filter from an autoparts store will fit, but you have to really crank the hose clamps and it is kind of sketchy.

So you either need an adapter or a larger filter. Unfortunately the larger filter is like $16 instead of $5 lol. I think it is WIX 33299 at orielly. That is 1/2" diamter, most others at the store don't go beyond 3/8.

 

 

Actually the WIX mentioned above are the ones I bought and am reconsidering. Does it make sense to put smallish filters ahead of a large filter?
The larger clear filter in the box in the photo above may be a good compromise. Or this one, similar style to stock but smaller:
https://www.partsplus.com/catalog-2/...ype=partnumber
We can get stock size filters rather cheaply:
https://www.carpartsdiscount.com/fue...html?3594=2180
but is this massive overkill? I suppose Jaguar felt the fuel pump and crossovers did not need the filtering but possibly did not expect them to have to face the rustiness of a decades old fuel tank.
For those who have installed a smaller filter - how often have you changed them out?

 

Well the filter itself is smaller but the diameter is a lot larger. I'm not sure how capable these pumps are of pulling, so that increased diameter may be important. This smaller filter is just fine for protecting the pump and doing some pre-filtering.

I have junk in my tanks, so I 100% need these to keep stuff from the fuel pump, plus the in-tank pre-filter is missing on the RH side. The XJS uses the same type of pre-filter in the sump tank. It isn't anywhere near as robust at the post-pump filter, but again its job is getting big stuff out and protecting the pump.

The post-pump filter has a larger surface area, which is good for service life and protecting the fuel injectors.

Again, everyone keep in mind these lines are 1/2" so most fuel filters from the store do not fit. You can make it sort of work but pinching a hose over something too small is just too sketchy for me.

 

Exactly.

More reading and some pics....

https://www.jaguarforums.com/forum/x...85-xj6-145556/

Cheers
DD

 

I have been running those filters for nearly 3 years and they still look as clean as the day I fitted them. I might be lucky and have not rust in my tanks. I bought a new set after a year but haven't had to change them so far.
As far as I can tell the smaller filters do not restrict the flow, the car has been on the race track many times and never had fueling issue.

 

Nanonevol,
You're on the right track. Pre filters are a must on these cars now with decades old tanks and ethanol blends. 1/2" sizes are best, I don't recommend glass types, but I do wish they made clear plastic in 1/2". Pre pump lines are low pressure, the main filter should be the metal canister bosch type as original, to handle hi pressure from the fuel injection pump.
In 01xjr's pic, he was able to replace his main filter with a clear plastic because it's a carburetted car, not fuel injection, thus a low pressure system.

 

o1xjr...............because if you search O1xjr you will find a lot of irrelevant crap.

 

But what a gorgeous silver ser 1 Jag you have!

 

One slight bit.


As a rule, electric pumps push well but don't pull well that well Hence the rear placement in most installations.


In the jaguar installation, gravity feeds the pump. Negates any weakness in pull power.


Quite well done from the beginning.


Owners of older cars using mechanical pumps that are not driven regularly of the install an electric booster at the tank, Saves extra cranking to fill an emptied carb bowl.


I installed one on one of my 57 Ford F100's, just for the fun of it!!!
Decades ago.


Carl

 

Yep, I'm the first to admit it. Took a lot of work and here she is again.

 

while in California I saw a series 2 that had been lumped with a crate 350 with old school 4 barrel carburetor. He had the fuel tanks plumbed together with a "tee" and used the gm mechanical fuel pump on the engine. No return lines and he said it worked great.

 

I have the same plan to add to clear filters prior to the change over valve.
01XJR do you have a part number for the ones you've used? I'm struggling to find a clear filter with a 1'2" barb.
Thanks

 

No, sorry don't have part numbers. I bought them at a small local parts shop off the shelf when they were clearing old stock to move to a new building.

found the number for the bigger one. Z14/15KC $4.50
Smaller ones are on the receipt as W3.5 $5 each.

 

Yellow:


Not that rare. Elinor's NIX is plumbed that way. She posts here a lot.


Carl,

 

As I mentioned, 1/2" is very rare. I posted the part # for a metal type in a previous post. Just write the mileage in sharpie and change them at appropriate times. Also mentioned you could adapt to a smaller size and use the clear ones, but it may negatively impact flow rate

 

Thanks, That's what I'm finding! I'll continue looking for 1/2" bard clear filters for a bit I may have found some cheap cleanable ones in China is they pan out I'dd share.