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It takes 2 bottles of the GM supercharger oil (or Ford supercharger oil, they are the same product). Do not try to substitute anything else for it either. It is a specialized oil built for the iron bearings that are used in these superchargers.
Usually the rattling sound is a sign that the supercharger is going bad. Basically there is a little coupler in between the supercharger front nose cone and the main supercharger housing. There are around 6 holes in it that connect the front of the supercharger to the back of the supercharger. Over time the round holes will turn oval and it will start making a sound. Once this starts to happen the rest of the supercharger will shortly go bad. You will then need to buy a rebuild supercharger. you may also want to check the oil level in the super charger as well. there is a check level under the wire harness ,just near the altinator you will need an Allen wrench to open it ,the oil level should be just as it hits the bottom threads . You can save money by purchasing a coupler repair kit off eBay. I just bought one that included the coupler, SC oil, gasket sealer, suction device, and a rag for $40. Watch that the directions are not for a M90, the 95 Rivi has a M62. Dont dissassemble the front of the engine thinking you can remove the snout without unbolting the SC from the intake. Just remove the fuel rail and injectors, loosten the 2 screws holding the PS resevior, and unbolt the supercharger. Tilt it up at the snout end enough to get clearence for the snout to be removed over the Alternator bracket. Put a clean rag and around a 2x2 piece of wood or similar and place it under the SC to brace it up in the air so you can remove snout bolts and snout. Separate the snout, replace coupler, regasket, and reuse the SC to intake gasket. 2 HR repair for an average weekend garage guy. I just completed it and my SC is QUIET and runs great! Many good repair shops are not aware of this repair on an M62. The M90 is easier.
Yes
Next to the pulley that is on the supercharger is a little hex nut. Take this hex nut off and drain the oil by using something to suck it out. Once all of the oil is sucked out, use "GM Supercharger Oil" which is a special blend oil and fill it back up. Make sure you fill it up to about 1/4 inch below this hex nut.
they can be installed on any veichals
It's in your owners manual
The coupler in the supercharger! It gets worn and the supercharger sounds like it's grinding rocks, it's common rip off saying they need a new unit, and installing a 40 dollar coupler. The blower motor control module located in the passenger floor board is also a common issue, it can go out and make the blower motor stay on even with the car off, or just not work at all. It also seems the control arm bushings wear out quickly, but they can be replaced on the 1995 (newer models have non serviceable units). Also the 95's don't use dog bone mounts, and the lower mounts often go out and need replaced. On the non mechanical side, my doors freeze shut and its scary tugging on that plastic door handle to open them.
This noise may disappear when putting the transmission in neutral, and may only be heard when the transmission is in Drive. Although it may sound like the whole engine is falling apart, the cause is only a worn plastic coupler that connected the input shaft of the blower to the rotors. The holes in the coupler get worn "egg Shaped" and the backlash causes the noise. Generally, you can drive for a lot of miles without a failure of the part, if you can stand the strange looks you will get from other drivers at stop lights. GM will want to sell you a whole rebuilt supercharger unit, about $1600. plus labor, since they do not service the internal parts of the supercharger. Check online for rebuilt units, usually about $500. or maybe less, from independent rebuilders. You will need advanced mechanical skills and tools to change them out, so be good friends with a good mechanic. If you are skilled this much, the coupler is available separately on the internet for about $30, if you want to tackle the job yourself. Again, advanced mechanic skills and tools will be needed. Gaylord S. Yegge Certified Master Technician, retired GM tech.
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The engince control computer. Why ?
Does this happen all the time?
If its anything like my 95 Riv then you can get to it from behind.