Hemi block identification
#2640904
04/03/19 09:09 PM
04/03/19 09:09 PM
|
Joined: Jan 2005
Posts: 4,463
Michigan
MarkZ
OP
Worthy
|
OP
Worthy
Joined: Jan 2005
Posts: 4,463
Michigan
|
Can anyone tell me where this block came from and the year? Thanks.
1987 Fifth Avenue - 512/518/D60
|
|
|
Re: Hemi block identification
[Re: ScottSmith_Harms]
#2640942
04/03/19 11:15 PM
04/03/19 11:15 PM
|
Joined: Aug 2003
Posts: 43,364
Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,364
Bend,OR USA
|
Thats a reproduction block, looks like one made in the 1990's.
 That looks just like one of the over the counter Hemi Mega blocks I built back in the late 1990s Definitely not a stock pre 1971 block 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: Hemi block identification
[Re: Cab_Burge]
#2641049
04/04/19 09:03 AM
04/04/19 09:03 AM
|
Joined: Feb 2004
Posts: 1,019
Howell, Michigan
Hemidavey
super stock
|
super stock
Joined: Feb 2004
Posts: 1,019
Howell, Michigan
|
Could it be May 8 2012 ?
I'm curious too, I have a few of these and would like to know the date of birth.
My oldest repo block looks almost same as an original, has G O245 on top pad. The G is for Galaxy Machine, the company Chrysler hired to machine the blocks.
The other one is stamped MG 130 264 has large cast in boss for oil feed line next to oil pump pad.
Check the numbers on top, that may help identify. I'll ask my friend at Chrysler if he can find some info for you. The guy with much knowledge on these is Chuck at Best Machine in Livonia Mi. Nice fellow too.
Last edited by Hemidavey; 04/04/19 09:18 AM.
|
|
|
Re: Hemi block identification
[Re: MarkZ]
#2641093
04/04/19 10:55 AM
04/04/19 10:55 AM
|
Joined: Jan 2003
Posts: 17,926
S.E. Michigan
ZIPPY
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 17,926
S.E. Michigan
|
It's a Mopar Performance block for sure.
It was cast at the Motor Castings foundry. Most of that era were machined at a Cummins division to which
history has not been kind, they were not highly thought of. However several other places bid for the machine work, and you
will find blocks floating around out there machined by Roush and others who never actually had a contract.
In 2008 MP switched to the World type and the pictured family of blocks were gone for good/no longer made.
It's definitely somewhat older than 2008, but other than that I can be of no help.
Chrysler never required a casting date, or an easily identifiable machining date on that family of blocks.
When they were cut, Cummins would apply their own cryptic machining date code for which the Chrysler Engineer
at that time had no interest in documenting. I tried to work around this, and could only smack my head against
the wall for so long.
In addition to the design itself, the World style block also had an easy to identify machining date
with no goofy codes to decipher. However, the lack of a requirement for a casting date continued on for whatever reason.
Guess casting date wasn't thought of as important.
What's the deal with it? Thinking about picking it up? The more pics, the better.
Last edited by ZIPPY; 04/04/19 10:59 AM.
Rich H.
Esse Quam Videri
|
|
|
Re: Hemi block identification
[Re: ZIPPY]
#2641108
04/04/19 11:25 AM
04/04/19 11:25 AM
|
Joined: Dec 2004
Posts: 2,371
Wheatfield, NY
Cuda340
top fuel
|
top fuel
Joined: Dec 2004
Posts: 2,371
Wheatfield, NY
|
I believe they started casting them in the late 90's. Let me check some paperwork. My Hemi has H 434 stamped on the upper pad. I see you have one with a G you said for Galaxy Machine. I wonder what the H is for then?
Last edited by Cuda340; 04/04/19 11:33 AM.
|
|
|
Re: Hemi block identification
[Re: MarkZ]
#2641148
04/04/19 12:36 PM
04/04/19 12:36 PM
|
Joined: Feb 2014
Posts: 1,716
central il.
second 70
top fuel
|
top fuel
Joined: Feb 2014
Posts: 1,716
central il.
|
It's a Siamese mega block. From that picture without the motor mounts I can't say if it's a hemi or wedge mega block. The water blocks don't have MOPAR cast on them. The block I have is P5007669 which is a hemi water block with wedge motor mounts. The top pad is marked HW 1194 Which my guess means the H is for hemi and the W is for wedge mounts but that's just a guess. The casting is 6K29 which as Zippy has said is a mystery.
Mike
Last edited by second 70; 04/04/19 12:49 PM.
|
|
|
Re: Hemi block identification
[Re: ZIPPY]
#2641159
04/04/19 12:54 PM
04/04/19 12:54 PM
|
Joined: Jan 2005
Posts: 4,463
Michigan
MarkZ
OP
Worthy
|
OP
Worthy
Joined: Jan 2005
Posts: 4,463
Michigan
|
It's a Mopar Performance block for sure.
It was cast at the Motor Castings foundry. Most of that era were machined at a Cummins division to which
history has not been kind, they were not highly thought of. However several other places bid for the machine work, and you
will find blocks floating around out there machined by Roush and others who never actually had a contract.
In 2008 MP switched to the World type and the pictured family of blocks were gone for good/no longer made.
It's definitely somewhat older than 2008, but other than that I can be of no help.
Chrysler never required a casting date, or an easily identifiable machining date on that family of blocks.
When they were cut, Cummins would apply their own cryptic machining date code for which the Chrysler Engineer
at that time had no interest in documenting. I tried to work around this, and could only smack my head against
the wall for so long.
In addition to the design itself, the World style block also had an easy to identify machining date
with no goofy codes to decipher. However, the lack of a requirement for a casting date continued on for whatever reason.
Guess casting date wasn't thought of as important.
What's the deal with it? Thinking about picking it up? The more pics, the better.
Heh, I wish, my pockets aren't Hemi deep. It belongs to a friend of mine that bought it already installed and running in a 66 Coronet. Oil pressure started dropping towards the end of last season so he moth-balled it until he had time to take it apart; which happened this past weekend. It's currently completely dissembled and he found abnormal wear in the mains and a busted valve spring so far. Only mains 2-3-4 are cross bolted, has an Eagle crank in it with Manley rods. I could make out the Eagle logo on the crank throw, but everything else is pretty charred from balance job. He's just trying to figure out exactly what he has before he starts buying parts to put it all back together. I'll try and grab some more photos tonight. Thanks for the input everyone.
1987 Fifth Avenue - 512/518/D60
|
|
|
Re: Hemi block identification
[Re: MarkZ]
#2641167
04/04/19 01:28 PM
04/04/19 01:28 PM
|
Joined: Jan 2005
Posts: 4,463
Michigan
MarkZ
OP
Worthy
|
OP
Worthy
Joined: Jan 2005
Posts: 4,463
Michigan
|
Motor mount pads. No stamping on the top side of the block.
1987 Fifth Avenue - 512/518/D60
|
|
|
Re: Hemi block identification
[Re: MarkZ]
#2641169
04/04/19 01:32 PM
04/04/19 01:32 PM
|
Joined: Jan 2003
Posts: 17,926
S.E. Michigan
ZIPPY
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 17,926
S.E. Michigan
|
Although this series of block had it's share of issues, some folks prefer them for a closer-to-stock appearance.
They aren't "budget friendly", that's for sure.
I have seen a handful of these that had entirely wrong casting marks (no Mopar logo, and ended up being siamese when checked).
But they were painted, and may have had some customizing applied by a grinder for all I know.
Last edited by ZIPPY; 04/04/19 01:46 PM.
Rich H.
Esse Quam Videri
|
|
|
|
|
.jpg "Name: s-l1600 (2).jpg
Views: 674
Size: 92.87 KB
ID: 356411")