Which LS7 bearings?

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Jul 28, 2014 | 10:36 AM

spy2520

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From: Waldorf, MD

Which LS7 bearings?

Looking for main and rod bearings. TSP lists clevite MS2199 main bearing kit, but the clevite catalog lists MS2294 which are not as readily available as the former. I'm just guessing the rod bearings are the same across all LS engines (clevite CB663).

Jul 30, 2014 | 09:00 AM

spy2520

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From: Waldorf, MD

Katech also only lists the 2199 set.

Jul 30, 2014 | 09:51 PM

cam_arrow

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Quote:

Originally Posted by spy2520

I'm just guessing the rod bearings are the same across all LS engines (clevite CB663).

No...in 2012 gm changed the lsa engines with forged cranks to coated bearings. The ls7 was changed in 2009 I believe.

Last edited by cam_arrow; Jul 30, 2014 at 11:04 PM.

Jul 31, 2014 | 07:32 AM

spy2520

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Quote:

Originally Posted by cam_arrow

No...in 2012 gm changed the lsa engines with forged cranks to coated bearings. The ls7 was changed in 2009 I believe.

I was under the impression they were all coated, but they changed to a lead-free part to comply with new European regulations.

Do LS7s have a specific part number for main and rod bearings?

Jul 31, 2014 | 12:51 PM

c0ncEpT

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From: Shelby twp, MI

MS2199H & CB663HN are the bearings I would/have used.

Jul 31, 2014 | 01:27 PM

spy2520

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That's the set I ordered. But once I got them I noticed they said "ls1 ls2 ls3" while the ms2294 list as "ls7 ls9". Only thing I can think of is forged crank. Maybe since the H's are narrower either set would work. I dunno.

Aug 1, 2014 | 07:19 PM

eroc022

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you are doing an ls7 build? and you are in waldorf?!?!?! Im doing one and I am in La Plata... as far as I know I have been just ordering fresh GM bearings, and from what I have found out, they changed the bearings in 09 to a coated bearing.... otherwise not too sure on aftermarket..