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Need info about Eaton M62/M90 snout bearings, Please.

12-18-2008, 01:36 AM

The snout bearings on my 1995 Olds LSS M62 supercharger are whining like crazy. I know about all the kits that are available out there, but I live pretty close to one of the largest bearing warehouses in the country (Jamaica Bearing) and if I only had a little more spec info and or Part numbers I could get the pair of bearings and the seals much faster and cheaper. Just by looking at some of the kits on ebay I can see that the bearings are put out by SKF and the seal by Federal. So come on somebody out there who bought one of the M62/M90 snout kits, maybe you still have the boxes with the numbers? The bearings for the Eaton M90 are the same so anybody who can be of assistance please take the time to post, I'd really appreciate it.

Ebay link 1 ( riesQQddiZ2811QQcmdZViewItemQQptZMotors_Car_Truck_ Parts_Accessories?hash=item130265238764&_trksid=p4506.c0.m245&_trkparms=72%3A543%7C65%3A12%7C39%3A1%7C240%3A1318 #ebayphotohosting)

Ebay link 2 ( Q20TruckQ20PartsQ20Q26Q20AccessoriesQQcmdZViewItem QQptZMotors_Car_Truck_Parts_Accessories?hash=item3 20325684690&_trksid=p4506.c0.m245&_trkparms=72%3A543%7C65%3A12%7C39%3A1%7C240%3A1318 #ebayphotohosting)

Ebay link 3 ( _Car_Truck_Parts_Accessories?_trksid=p4506.m20.l11 16#ebayphotohosting)

By the way, Jamaica bearing is a great resource that you should check out, they have got every bearing conceivable from the tiniest that would fit into a wrist watch to the size of a monster truck tire. They have never failed me, if I was able to provide a number to them or even take caliper to the bearing and provide the physical dimensions they've been able to cross reference to the exact part I needed every time. I have got countless power tools (some very sentimental) still in service to this day thanks to them. And Cheap! you will not find a better price. I'd be willing to bet that these snout bearings would be no more than $6.00 each thru them. If it's ok with the mods I would like to drop this post in a couple of other GM forums to increase my odds a little.

Jamaica Bearing (



12-18-2008, 07:57 AM
This is what I have for the Eaton M90 blower snout:

Chicago Rawhide Snout Seal

Part Number 7965 (fair)
Part Number 7966 (ok)
Part Number 7967 (better)
Part Number 7968 (best - high dirt and dust)

Snout Bearings...... Note: MRC owned by SKF

Front Bearing Part Numbers:
* MRC - #203S
* NSK - # NC6203C3X28
* SKF - #6203

Rear Bearing Numbers:
* MRC - #204S
* NSK - NSKNC6204C3X28
* SKF - #6204

12-18-2008, 11:56 AM

Thanks for the prompt reply. So Chicago rawhide makes 4 different seals for that application? And on the bearings, how did you know all those different #'s, did you get one brand as a set and do a cross reference for the rest? If so which did they actually furnish in the kit?, and can you recommend one or the other out of them like the seals or are they basically the same? In my research I've learned that there are some cheap chinese ones (at least some of the guys on ebay would have us believe) to be aware of and the better ones are C-3 rated. I'll let you guys know how I made out at Jamaica Bearing as far as price and availability.

thanks again,


12-18-2008, 12:33 PM
You're welcome.

I have over 10 years working on GM L67 engines and Eaton M90 blowers. I've rebuilt a few snouts and main bodies to include rotor seals and bearings. The part numbers are correct based on getting the bearings from a local bearing supplier.

Your other option is to go with reliable and reputable companies like Rolling Performance or ZZPerformance with the snout rebuild kits or parts separately. Just keep in mind the snout bearings have to be pressed out and in, so local automotive machine shop assistance will be required. The best snout seal to use is the Viton type. See links below.

ZZPerformance M62/M90 Parts (

Rolling Performance M62/M90 Parts (

12-18-2008, 01:12 PM
Oh cool , so you do the same as what I'm trying to do, just curious but only if your comfortable with it of course, would you mind telling me what they go for, was I pretty close in my approximation $6.00? And can you comment on the quality of the bearings from one manufacturer to the other. I've always been kind of partial to Timken. And I'm really lucky you posted, you sound like exactly who I was looking for.

12-18-2008, 01:29 PM
One other question, the bearings are the same for M90/M62 right? I'm not 100% on that. I also found a good article on this topic in a search of the part #'s that I haven't seen posted yet.

This one looks a little better than the other two I found posted here over at sympatico ( and rollingperformance (

12-19-2008, 11:10 AM
To the best of my knowledge as long as the M62 or M90 is a Gen 3 blower yes.

I checked my old invoices and the bearings were the SKF brand. The 6203 was $3.75 and the 6204 was $4.25. C3 rating.

Also, keep in mind other special tools will be needed. Like to remove the SC pulley so a SC pulley puller will be required. I have a Pulley Boys brand.

12-19-2008, 04:17 PM
You got a great hookup for those bearings. Jamaica Bearing came in a little higher than I expected. They are looking for $6.80 for the #6203 and $8.10 for the #6204. On the seal the only part he had was by National for $3.60 but its not Viton it made out of Nitrile. He was trying to convince me that it's not available in Viton. The Viton seal was a bit of a challenge to locate. Since Chicage Rawwhide is now SKF the new # is 692294. I ended up hitting the phone book and found another place on Long Island called Youngs Industrial Power Transmission and Bearing Supply Corp. They will have the seal in on tuesday from SKF and it's costing $12.50, pretty steep for a seal. Or I can take the CR #7966 for $6.40. Is the Viton that much better than the Nitrile? What do they use from the factory? I'll probably spend the extra 6 bucks. The bearings they have in stock for $4.00-#6203 and $6.00-#6204 by KYK, a Japanese Co. My experience has been good with the parts from Japan, at least as good as the American in most cases. It's the Chinese stuff that I'd rather stay away from cause they can be inferior. What's your opinion?

thanks again.


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