I have just driven about 1800km on a five day trip to the UK from my home country the Netherlands. Jaguar performed flawlessly. Did about 13l/100km which all things considering isn’t too bad either.

I am happy to report that the hoses for the oil cooler I recently replaced and wrote about are holding and not a drop of oil under the car.

However, a new problem has manifested itself.

When I got home, with the engine idling away I heard a distinct whining noise coming from the front of the engine. Got my stethoscope out and started checking various bearings, at least the ones that are accessible with the engine running. Nothing stood out. Parked the car as it was late.

This morning I had another go at it. As soon as I turned on the ignition I heard the distinct whine and when I started the engine it was gone. Checked a bit more, but it looks as if the Supercharger Coolant Pump is on it’s last legs. Sounds like a bearing gone, or at least on it’s last legs.

I have to fix my Mercedes W123 first today (new exhaust), but I might be able to take the pump out over the (Easter) weekend. I already checked and this pumps are expensive. At least the original Jaguar ones.

Does anybody have any experience with alternative suppliers for this pump?

Is this pump sealed or would I be able to take it apart and maybe fix the bearing?

Thanks

Jeroen

 

You can take the opportunity to upgrade to a higher flow Bosch 0 392 022 010 (Mercedes W203 W215 W230). I bought one on Ebay last year for USD 106.50. You will need to move (solder) the cable from the original pump to it and make a new bracket. This is my installation:

 

+1

 

+1 on the 010 Bosch pump upgrade. Did this almost a year ago and never regretted it. The Bosch pump creates a much higher flow in (at least) the intercooler coolant circuit and is used e.g. in many Merc AMG models.
This helps to run the engine cooler which is always good for the SC cars.
Except of the connector soldering it's a simple plug'n'play fix. You'll have to adjust the mounting bracket a bit too, as already stated above. A little bending worked for me though. The fittings for the coolant lines fit out of the box - no need to adjust anything here.

My shopping list was:
1 x Bosch pump 0 392 022 010
1 x Mercedes A2305400081
2 x Mercedes A0085456326
2 x Mercedes A0005456880

I created the connector adapter by cutting the wiring from the old pump and crimp on the Mercedes parts. This way, you can keep your engine harness unaltered. The Mercedes parts are normally available from a Merc dealer around the corner.

I never heard of anybody rebuilding the pump and I never saw any rebuild kits either. So you'll have to buy the pump anyhow - so I'd advise to spend the money rather in the Bosch pump as an useful and sustainable upgrade to your engine.

 

 

What is the output of the stock pump? I always see flow ratings for the upgraded pumps, but I have never seen data for the one that came in the car.

 

Thanks everybody for the suggestions. I will start looking into the upgrade, see if I can get these parts here in the Netherlands.

Jeroen

 

Somebody posted some time ago that Bosch 0 392 022 002, 1,200 l/hr, has 14% higher flow than the original so, if the info is correct, it can be calculated back what the original does. Bosch 0 392 022 010 does 1,400 l/hr.

 

Just ordered the parts. The Bosch pump was available at several website, so I went for one of the cheapest but still a webshop I used before. About 25% of the original Jaguar part.

I called my local MB dealer and they will get the connector parts within the next 48 hours. Now I just need to get cooling liquid and this weekend I hope to fix this problem!

Jeroen

 

Hi,

Sounds good! Fingers crossed for the repair!
Before you drain the coolant please be sure that you have a 19mm Allen key at hand. You'll need that for the proper fill procedure to purge any trapped air in the system.

​​​​​​Btw maybe it's sufficient for you just to drain the small (=intercooler) circuit instead draining the the whole system from the main radiator. The intercooler radiator has a separate drain plug which helps you to go down this route.
Please keep in mind that draining from the main radiator doesn't drain the entire intercooler circuit - so an additional bucket is handy if you remove the intercooler pump.

 

Thanks, that’s a good suggestion! I need to check on this purge procedure. No idea where that purge is located. Somewhere high up on the engine I imagine?

I just checked the official procedure from the workshop manual and they suggest to just clamp the two hoses. I am pretty sure I have two of these hose clamps somewhere, which will make it a lot easier. Also, it suggests removing the fans, which might make it bit more easy to get at everything.



I replaced the rubber grommets on the two bolts, holding the mounting bracket in place a few months ago. They were perished. Silly design, this whole pump still more or less swings about. Bit fiddly to get at with nothing else removed.

Just got a mail, my new pump is already dispatched!!

Jeroen

 

Hi,

That's great - didn't know that the workshop manual has separate instructions for replacing the intercooler pump. I skipped that as my coolant system was already completely drained when I did the upgrade.

Take a look for "charge air cooler filler point" in the manual. The filler point is the large hex-nut on top of the supercharger outlet duct (the plate with "V8" engraved on top of it, located between the two intercoolers). You'll find the procedure in section "303-03A Engine cooling".

 

The pumps for automotive applications are typically waterproof or they are of conventional construction w/rubber case. Some of the designs are repairable -- others have crimped motor construction and don't take well to being opened up.

The Denso units often need the brushes .. did anybody on this thread take apart the OE Hella pump motor?

 

Got it!

 

That's it!

​​​​​​If you take a closer look at the coolant flow diagram which I posted a few days ago, you'll notice that the intercooler circuit is connected to the main coolant circuit with only two small hoses (marked green in the diagram).

And as the charge air filler point is the highest point of the intercooler circuit (as is the expansion tank for the main circuit) it is essential to have it opened so that any air can escape.

 

Always found those instructions a bit confusing ... it tells you to fill the overflow tank and then later informs not have the charge vent open with the tank open?

Thankfully, the engine has an over designed bleed system that seems to take care of any misdeeds.

 

Yes that is correct. When you start filling (or a checking the level at) the intercoolers through the top opening, you have to close the expansion tank. Otherwise, since the intercoolers fill point is higher than the expansion tank, the coolant will overflow out from the tank.

 

I did exactly as xjr2014_de did, making my little adapter cable. I did this on my XKR and I think I was like $110-120 into it total; the hella pumps are hella overpriced and the bosch is a great unit of higher capacity for a lot less money. It's a no brainer to switch.

 

I took my pump apart last month when upgrading. I'll see if I can get a pic of it but i do recall part of it encased in rubber liner.

 

Have rebuilt the MB units (brushes) ..... have also switched out the motors. The heads are the same on many units .... they have different motors. I'm not versed on the Hella pumps. I thought the HVAC pump was a Denso.

Back when I was rehabbing cars -- the pumps were always a "take while I can item" regardless of model.