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  1. #1
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    How to check if your supercharger bearings are worn

    I have just put her to bed for some long planned maintenance. Jobs will include replacing the charger bearings as they are yet again worn out. This time I am going to order some upgraded components from the states and attempt the job myself. The way I tested the charger was by removing the supercharger drive belt causing the engine to run on the bypass valve. This enabled me to hear only the engine and the rumbling sounds had disappeared. I have also discovered that the oil Eaton uses to fill the charger is called Nye 605, I have the spec. sheets if anyone wants to see them and find an equivalent which maybe easier and cheaper to get.

  2. #2
    Junior Member
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    May 2009
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    Re: How to check if your supercharger bearings are worn

    Interesting find re the oil, but still doesnt seen any easier to find!

    Have you managed to locate a source?

  3. #3
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    Re: How to check if your supercharger bearings are worn

    Not as yet however I have heard it may be the same viscosity/density as gas turbine oil the type used by aircraft and MOD vessels. OX 22 is the MOD name of gas turbine oil, I am going to try to find the COSSH sheet and compare the constituents.

  4. #4
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    Re: How to check if your supercharger bearings are worn

    hello, who normally replaces your supercharger bearings? how much is it? can the car be driven when the supercharger belt is taken off as I want to test mine? thanks

  5. #5
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    Re: How to check if your supercharger bearings are worn

    Hi, you dont have to drive it, you can just remove the supercharger belt from the 3 pulleys. put the 1/2 inch ratchet drive (the bit a socket fits to) in the square slot on the pulley tensioner (the slot below the round hole) and pull it towards you (standing on the front passenger side) watch your hand coz sometimes it slips out if not all the way in. then release the belt from the pulleys. You can then start the engine as only the drive belt is still on and the supercharger bypass valve opens. If it sounds much quieter than when the charger was spinning ie no rattling etc then you probably have worn collet and bearings. I had mine done in Scotland but after only 3 months the noise came back , perhraps due to too much torque for it too handle,Companies in the USA offer reconditioning service with upgraded components or you could attempt the job yourself with the kits available.

  6. #6
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    Re: How to check if your supercharger bearings are worn

    How did u fix yours in the end? The guy in Scotland has posted on here he can put uprated bearings in and was hoping that would cure the prob?

  7. #7
    Senior Member jerry's Avatar
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    Re: How to check if your supercharger bearings are worn

    Hi. As an aircraft engineer i think you will find that EXON is comercial ac turbine oil. you will need to find the spec sheets not the COSSH sheets. Castrol also do a turbine oil as well. I cross referenced JET A1 fuel and it's spec is also called Military Diesel for those of you who want to know
    Jaguar X350 XJR Freeflow SS Exhaust. / Jaguar X308 XJR

  8. #8
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    Re: How to check if your supercharger bearings are worn

    so is EXON oil the best to use to prevent it going wrong again? sorry for all the questions!

  9. #9
    Senior Member jerry's Avatar
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    Re: How to check if your supercharger bearings are worn

    Well somebody posted on here that the original oil was the same as gas turbine engine oil. Im not sure if this is true but i would'nt be supprised if it was. The oil for gas turbine engine is also used for the air start motor, this being similar in fuction to a supercharger but in reverse.
    Jaguar X350 XJR Freeflow SS Exhaust. / Jaguar X308 XJR

  10. #10
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    Re: How to check if your supercharger bearings are worn

    We use an oil called OX 22 for the Marinised Olympus Tynes (concorde engines) on board various RN vessels, once I get the spec. sheets I will compare with Nye 605 (thats the oil Eaton use) meanwhile im just about to attempt the bearing replacement myself, or if I can get hold of the chap in Scotland ask him to do it again.


 
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