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4 Star General
Join Date: Jan 2006
Location: Chase, MI
Posts: 1,511
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"TD" Engine Block - Response from Hercules
I've been corresponding with a fellow Deuce owner on the MV Net regarding the "TD" engine blocks. He wrote Hercules about this issue, following is his email to me with the response from Hercules:
"Morning Lee,
I went and wrote to Hercules Engine Parts company formerly Hercules engines. I emailed them in regards to the "TD" and thicker deck and here is what they stated:
"Phil,
Yes you are correct, the engine was used in the 5-ton truck. The designation TD was a design change made to strengthen the deck surface, this kept the head studs from pulling out, this area was also known to crack, but only in a limited amount of cases. The design change came into effect when the engine was used in commercial applications." Mark Crabtree at Hercules Engines
Thought it was interesting. I have not yet looked at my engine but I have a spare engine that is marked TD but is a turbo unit where my current engine is not.
Thought that this might be of interest to you.
Talk to you later !
Phill"
Photo below courtesy of Recovery4x4 from an earlier posting.
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4 Star General
Join Date: Apr 2005
Location: Buick City, MI
Posts: 2,768
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Great info! Thanks for the research! I need to check my Herc for that.
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Sergeant Major
Join Date: Apr 2005
Posts: 122
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Quote:
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Originally Posted by Armada
Great info! Thanks for the research! I need to check my Herc for that.
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I just went and checked my truck TD installed in 93.
bozo
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General
Join Date: Apr 2004
Location: Boulder, CO
Posts: 545
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4 Star General
Join Date: Nov 2004
Location: Ft Campbell
Posts: 2,053
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my original the 72 White non turbo is a "TD" and my new 89 Hercules 1D is a "TD" so the fix is from
before Hercules took over fully.
M35A2 and anything in the motorpool 
11B Bco 1-502INF 101st ABN
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4 Star General
Join Date: Apr 2005
Location: Decatur, Ga
Posts: 2,134
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Turns out mine is a TD too. Hmm. What's this mean, we got more durable blocks?
Ryan Gill
15 Recce Re-enacting Group
1943 Humber Mk IV Armoured Car
1947 Jeep CJ2A basket case
1960 Daimler Ferret
1972 AM General M35A2
x2 M514 1Ton2Wheel Trailer
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Fleet Admiral/Moderator
Join Date: Jun 2004
Location: Loxahatchee, FL
Posts: 16,185
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See, told ya so!
Deuce Czar!
2 Deuces, 1 CUCV and 5 Trailers.
This Steel Soldier Honors the Living Memory of David Frankenhauser, 1954-2009.
May you Sail in the Grace of Our Lord, Chaplain!
“The earnest prayer of a righteous person has great power and produces wonderful results.” James 5:16.
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4 Star General
Join Date: Mar 2006
Location: columbia,sc
Posts: 2,552
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mine's a turbo and TD block.
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Fleet Admiral/Moderator
Join Date: Jun 2004
Location: Loxahatchee, FL
Posts: 16,185
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Both my tractor and the old cargo that WCJIV has were both non turbo originally and both have TD blocks. Both are also now turbocharged.
Deuce Czar!
2 Deuces, 1 CUCV and 5 Trailers.
This Steel Soldier Honors the Living Memory of David Frankenhauser, 1954-2009.
May you Sail in the Grace of Our Lord, Chaplain!
“The earnest prayer of a righteous person has great power and produces wonderful results.” James 5:16.
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