Mega block main bearings?
#3193929
11/28/23 03:35 PM
11/28/23 03:35 PM
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Joined: Jun 2003
Posts: 2,411 Weatherford, Texas
RapidusMaximus
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Weatherford, Texas
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Are the main bearings different on a mega block vs a standard 440 block? I ordered main bearings for a 440 and I cannot get the thrust bearing in either the block or the cap….help…
1968 Plymouth GTX 1974 Dodge P/U Long Bed Stepside 318 2019 Ram 2500 6.4, auto, 4WD
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Re: Mega block main bearings?
[Re: AndyF]
#3193953
11/28/23 04:36 PM
11/28/23 04:36 PM
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Joined: Jun 2003
Posts: 2,411 Weatherford, Texas
RapidusMaximus
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Just left the machine shop and what has apparently happened was something I had never heard of…the early model blocks have room for a wider flange and later model blocks have a narrow flange, I do not know what year this block is, it has pn 2468330-M on it but no date. The machine shop traded me some King bearings with a narrower flange and they fit perfect but the are 1/2 grove vs full grove…should I be concerned? This is a 1000 hp bracket engine, thanks.
1968 Plymouth GTX 1974 Dodge P/U Long Bed Stepside 318 2019 Ram 2500 6.4, auto, 4WD
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Re: Mega block main bearings?
[Re: RapidusMaximus]
#3193961
11/28/23 04:56 PM
11/28/23 04:56 PM
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Joined: Jan 2004
Posts: 4,566 Motor City
6PKRTSE
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Motor City
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I run the King bearings in my Megablock 528 Hemi for several seasons now on the street and strip use with no issues.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Mega block main bearings?
[Re: 6PKRTSE]
#3193971
11/28/23 05:21 PM
11/28/23 05:21 PM
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Joined: Jun 2003
Posts: 2,411 Weatherford, Texas
RapidusMaximus
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[quote=6PKRTSE]I run the King bearings in my Megablock 528 Hemi for several seasons now on the street and strip use with no issues. [/quote Are they full or half grooved?
1968 Plymouth GTX 1974 Dodge P/U Long Bed Stepside 318 2019 Ram 2500 6.4, auto, 4WD
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Re: Mega block main bearings?
[Re: RapidusMaximus]
#3193980
11/28/23 05:59 PM
11/28/23 05:59 PM
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Joined: Jan 2004
Posts: 4,566 Motor City
6PKRTSE
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I will have to look at my records for the part number, but they are the XP series. Half grooved. I believe they are REBMB5116XP. I have always preferred King over Clevites, Fed Mog or others quality over the last several years. We build hundreds of engines every year with both King and Clevite bearings.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Mega block main bearings?
[Re: 6PKRTSE]
#3193990
11/28/23 06:59 PM
11/28/23 06:59 PM
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Joined: Jun 2003
Posts: 2,411 Weatherford, Texas
RapidusMaximus
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I will have to look at my records for the part number, but they are the XP series. Half grooved. I believe they are REBMB5116XP. I have always preferred King over Clevites, Fed Mog or others quality over the last several years. We build hundreds of engines every year with both King and Clevite bearings. Thanks for the update, looks like I’m going to have to polish the crank or order some .002 under size bearings, my clearance come out to be .001 to .0015…uggghhh
1968 Plymouth GTX 1974 Dodge P/U Long Bed Stepside 318 2019 Ram 2500 6.4, auto, 4WD
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Re: Mega block main bearings?
[Re: RapidusMaximus]
#3194075
11/29/23 04:44 AM
11/29/23 04:44 AM
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Joined: Aug 2003
Posts: 43,185 Bend,OR USA
Cab_Burge
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I Win
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Bend,OR USA
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Last edited by Cab_Burge; 11/29/23 05:02 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Mega block main bearings?
[Re: B1MAXX]
#3194228
11/29/23 06:45 PM
11/29/23 06:45 PM
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Joined: Jun 2003
Posts: 2,411 Weatherford, Texas
RapidusMaximus
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Well, after two trips to the machine shop, numerous phone calls and hours spent remeasuring everything it looks like the line bore was off about .001 to .0015 so back to the line bore machine it goes, isn’t this fun…, tried to find some “X” bearings but apparently then are made of unobtainatainum right now so here we go….
Last edited by RapidusMaximus; 11/29/23 06:46 PM.
1968 Plymouth GTX 1974 Dodge P/U Long Bed Stepside 318 2019 Ram 2500 6.4, auto, 4WD
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Re: Mega block main bearings?
[Re: Cab_Burge]
#3194375
11/30/23 08:31 AM
11/30/23 08:31 AM
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Joined: Mar 2006
Posts: 9,836 MI, usa
dvw
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I don't agree. Clevite knows more about bearings than either of us. Though mine doesn't make 1000 hp, I'll bet it makes north of 900. Been running for 11 years, nearly 1000 passes. Regularly sees 7100-7200 with a 4.5 stroke. 3/4 groove have never been an issue. Doug
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Re: Mega block main bearings?
[Re: dvw]
#3194402
11/30/23 10:40 AM
11/30/23 10:40 AM
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Joined: Jan 2004
Posts: 4,566 Motor City
6PKRTSE
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I don't agree. Clevite knows more about bearings than either of us. Though mine doesn't make 1000 hp, I'll bet it makes north of 900. Been running for 11 years, nearly 1000 passes. Regularly sees 7100-7200 with a 4.5 stroke. 3/4 groove have never been an issue. Doug Same here with mine. No issues. Plenty of street miles also.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Mega block main bearings?
[Re: 6PKRTSE]
#3194515
11/30/23 03:29 PM
11/30/23 03:29 PM
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Joined: Aug 2003
Posts: 43,185 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,185
Bend,OR USA
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Last edited by Cab_Burge; 11/30/23 03:31 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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