I just got told that the blower on my 1997 XJR has a dipstick to check the oil in it but know matter how hard I look I cannot see one. Is this true or is some having me on?

 

No dipstick but there a small filler plug at the front that you can remove to visually check the level

Cheers
DD

 

Yes, it's an allen key on a slight angle toward the front and fender. I changed my oil about 2 months ago. It's a synthetic and you can use standard motor oil. Alot of people have been using ford or GM supercharger oil.

 

Okay will look again in the morning,, Where is the drain plug? I take it the allen plug is where you fill the level up to..Yes

 

The only motor oil that I have heard of being recommended (though not by the car manufacturers or Eaton) is Redline oil - which has a Polyol Ester basis. I would not use regular motor oil (conventional or synthetic) and use Redline only in an emergency.

I used the GM supercharger oil (GM and Ford also use the Eaton superchargers) - the part number is: 12345982

Takes almost two of the bottles. I used a syringe with a needle (from an ink jet refill kit) to remove the old oil from the M90 supercharger on my XJR6.

 

Noticed that you are in Canada - GM Canada's part number for the supercharger oil might be different - check for #10953513

 

Interesting method of removing the old oil shown in this pic. Going to give it a try

 

Yep, that's a tried/true method for the GM 3800 engines that are Eaton supercharged like my Riviera. I also got a great plastic "irrigation" syringe from my local drug store. Add a small length of vacuum tubing to it and that worked like a charm.

Also, ditto on using the correct oil. I can't personally vouch for the validity of cautions against using something other than the GM oil (or equiv) but the consensus from those that have inquired with GM and Eaton on the GM forums is to only used approved oils and definitely not regular engine oil.

Al

 

Decided to go with the GM oil. Friend has 750hp mustang cobra that has ran mobile 1 synthetic for 70k miles and Steigmeier (one of the biggest supercharger rebuilders in the country) uses Mobile 1 synthetic but as cheap as it is for 2 bottles of the GM stuff that's what I went with.

The following was from SVT forums:

Eaton
FAQ for Superchargers
Q: How often do I need to change the oil in my supercharger?
A: The sealed oil reservoir in a supercharger is designed to last the life of the vehicle. Changing the oil is not recommended unless you suspect contamination, leakage, or other issues like bearing failure. Also, if your vehicle has an abnormally heavy duty cycle, such as racing or towing, you could consider changing the oil at regular intervals such as 20k, 30k, 50k, or 100k miles depending on usage.
Q: I’ve decided I need to change the oil in my supercharger. How do I do this?
A: If you do want to change the oil there is one fill/drain plug on the front face of the front cover. It will probably be an Allen type plug. You will have to suction out the oil using a syringe or other method before replacing with new oil. Fill levels are dependent on application. For aftermarket units, please consult the aftermarket partner company that produced that specific kit. For OEM units, please see the list below or email infosupercharger@eaton.com. New oil can be obtained from any GM or Ford service parts facility, or from one of the Eaton aftermarket supercharger partner companies or remanufacturers. Please make sure you do NOT use any other type of oil, including synthetic motor oils. These will cause failure.


whipple:
http://www.whipplesuperchargers.com/...aintenance.pdf
a. Lysholm compressor ONLY: every 25,000 to 300,000 miles with 5-50 wt.
full synthetic motor oil
b. New Whipple compressor ONLY: every 75,000 to 100,000 miles with one of
the following oils. Whipple part number SCOIL-155 (W140) or SCOIL-200
(W200), Ford Motorcraft part number XL-4, or GM part number 12345982.

Kenne Bell:
http://www.kennebell.net/techinfo/ge...chargerOil.pdf
Do not use just “any oil” in the Kenne Bell supercharger. It utilizes unique gears and seals that can be adversely affected by some
oils. Therefore, Kenne Bell recommends using only the Kenne Bell factory supplied supercharger oil. We know better than anyone
what oil blend works best in our superchargers and do not care to debate the issue with anyone.
We use a special blend based on Redline Synthetic 50W Racing Oil with a blue die that colors the clear oil so it can be seen on the
supercharger oil dipstick. The standard Redline 50W oil is so clear and pure that there is no color to the oil. Cost of this oil blend
from Kenne Bell is $4.50 and comes in a special plastic easy to use dispenser bottle.
We use Redline oil because we believe it to be the best oil available. That does not imply that other oils are not perfectly adequate
for engines or transmissions.
For normal use, we recommend changing the oil every 12,000 miles. Severe use will require more frequent changes.
The standard bottle holds 7 ounces and - depending on the kit - the supercharger takes approximately 5 ounces.

 

I have heard by many on this forum that once they changed the SC fluid, the whining noise is much more pronounced.

I have purchased the GM SC fluid and will hopefully get to it this week.

 

Does the M90 on the XJR use a plastic "coupler" as well? On GM applications of the M90 there is plastic coupler inside the snout that over time will wear and cause pronounced rattling especially when idling. It has no significant performance or reliability impact, but is quite noisy.

Fortunately the part is $20-30 and DIY replaceable, although the snout has to come off of the SC.

GM dealers won't service the part though and require a complete SC replacement.

Curious if the XJR M90 suffers the same issue?

 

All replacement couplers are plastic, all m90 couplers are the same. very easy fix.