Does anyone have a good recommendation for a supercharger rebuilder in the USA? If you have a place to avoid I would appreciate that info to off list. The car is a 95 XJR. thanks Nick

 

the first thing to go is the sc coupler, this you can replace with the sc still on the car. I did it in about 1 hour. what is it doing?

 

This is a 95 XJR that I saved from the crusher this week.The previous owner said the supercharger bearings were bad. I've not had time to confirm that yet. It will start ; but add any throttle l it will die. Any tips on checking the supercharger?.

 

i would take the belt off the snout of the sc in order to spin the pulley freely. then take the pulley on the snout of the sc and turn in slowly, direction dont matter, in order to feel when the pulley engages the gears inside. you can feel when the gears engage as the rotors will spin, if there is excessive play, you can turn pulley a fair amount without engaging the gears, the sc coupler is bad. this will cause the sc to rattle alot when it is running sounding like it is bad. if it is a bearing no problem, they are cheap and not as bad as it seems. if snout bearing is bad just remove snout and have it rebuilt at any machine shop, you only need to remove sc if rear bearings are bad. I have spare sc should you need one, but really think it is just the coupler and this is a 20.00 dollar part.

 

Thanks for the imput. I'll follow your test proceedure and report back what I find.

 

You were right on the money .Not much of a coupler left.I ordered one today. The car also has a lot of other std issues , oil in plug wells, couple of cracked coils etc. Thanks again Nick

 

remember you only need to remove the snout to change to coupler, dont waste your time by removing the whole sc from the car. Tell us more about your jag, how many miles on it and what are your plans for it. are you looking to cruise it or do want to get all the horses you can out of it? sounds like all you need to do is change out the cracked coils and valve cover gasket, gaskets for the coil wells and you got yourself one cool ride.

 

Well the supercharger was ok. The noise is coming from the timing cover. This car is not worth the effort.So she is parts for the other XJR I have.