Eaton’s M45 supercharger was supplied on various models of Mercedes from C-Class, CLK, SLK and E-Class models. Using Eaton’s earlier gen rotor packs they are good dependable superchargers. These are not to be confused with other M45 sized superchargers as used on the BMW Mini or from aftermarket suppliers, for these please see our other pages.
Good though they are, these superchargers can be subject to premature seal, bearing wear, or failure of the drive coupler. A degree of maintenance is required to keep things working just as a car’s engine needs it. Rattling at idle is the first indication that something is going wrong, usually that a bearing is starting to wear, or that a drive coupler is fractured and failing. The important thing is to have them repaired when you hear early signs of something being wrong – if they are left rattling too long and the damage will spread from bearing wear, which is curable, to wear of the rotors and/or main casing, which can become bad enough to scrap the supercharger.
Replacing the bearings and oil seals in your supercharger will give it a new lease of life, and your own peace of mind. As long as issues are not ignored and repaired early, our Eaton M45 supercharger rebuild kits, which start at £46 for a snout rebuild set, should fix the problem. You will need access to a workshop press but other than that the job is not beyond the ability of a competent home mechanic.
Please note all quoted prices unless otherwise stated include UK vat at 20%.
M45 SNOUT REBUILD KIT
If you have leaky snout oil seal or you suspect a noisy snout bearing our M45 snout rebuild kit at £46 may be the most cost-effective way to have your car back to good health. The snout rebuild kit includes front and rear snout bearings, snout oil seal and the required oil to fill the supercharger after reassembly.
BUT – if there’s any doubt over the condition of the rear bearings, it would be advisable to change them as well. The rear bearings are prone to failure, and you may wish to avoid a future repeat of the process to remove and refit the supercharger for the sake of two more bearings first time around by buying the full rebuild kit!
SUPERCHARGER REBUILD KITS
Our M45 supercharger rebuild kits include a mix of high-quality aftermarket bearings and seals chosen for maximum life and specification to match OE alongside original OE components where available. All your main components that need replacing on the Eaton M45 are provided that can be changed with only some basic workshop tools including a workshop press. Depending on model our base rebuild kits will come complete with replacement snout seal, snout bearings, case bearings and new supercharger oil to refresh your M45 supercharger from just £142.
ROTOR PACK BEARINGS & SEALS
Our M45 supercharger rebuild kits do not include the pair of bearings and seals situated between the rotors and timing gears of the rotor pack. This is because Eaton rolls the casting onto the bearing outer race at manufacture, permanently sealing them in, meaning the casing has to be fractured to remove those bearings. That said, these are in an oil bath and rarely fail – when rebuilding superchargers, we do not change the rotor pack bearings. If they do fail, some service providers in the US do offer rebuild of the rotor pack, but the Eaton Corporation themselves consider this to be an unreliable and often unsuccessful route to repair – when the rotor pack is worn out or damaged the only dependable solution is a new rotor pack.
If you have engineering facilities to rebuild your Eaton M45 rotor pack we can supply you the parts, but caution that it is not an easy task and do not recommend it for the home mechanic or non-specialised professional workshop.