Re: [ihc] questions about older motor designations

[Colin MM Rush <salmineo@xxxxxxxx>]

Wow, that was much more than I was looking for.  This is one of those
'cut & save' posts.  Thanks for the info.  Regarding the letter
designations themselves for the older motors, do the individual letters
stand for anything themselves?  I had already figured out that the second
"A" and "B" referred to the engine size or type, while the last letters
referred to the model or design of the engine.  I am thinking more along
the line of a literal meaning (an acronym) rather than an assigned
meaning, if there is one.  For example, "SV" means "small vee" motor.  I
find it hard to believe that "HD" would mean "heavy duty" since it was
used in the lighter duty trucks, but perhaps that is so.  Any ideas on
the others?  Knowing the full meanings would help me keep them straight
in my head.  I am perplexed why the UHM motor was not included in the
Thompson booklet, since it was made in the timeframe the booklet covered.
 I would extend my question to include that engine though.
-Colin Rush

Date: Sat, 21 Aug 2004 22:55:17 -0500
From: Howard R Pletcher <n9ads@domain.elided>
Subject: Re: [ihc] questions about older motor designations

Here is some history of the IH engines that I have collected.  It doesn't
answer all the questions about what the desginations mean and isn't
necessarily complete, but here it is.

An overview of IH Truck Engines since the 1930's

Willys-Overland 213" L Head in the 1933 D-1 Pickup became the HD Series,
174, 213, 232", which became the
GRD (Green Diamond) Series, 175, 214, 233" in the K-Line in 1941

There was a UHM series, unknown displacement, OHV, wet sleeved, built
1938 thru 1941.

The SD (Silver Diamond) series replaced the GRD for the L-Line in 1949. 
This was a new engine, 220 and 240", with a 264" adde in 1954.  These
were replaced by Black Diamond engines of the same size in 1955 in the
S-Line thru 1962, replaced by the Blue Grey 240/241" in 63.

The FAB was a valve in head with wet cylinder liners in 241 and 259"
versions.  This became the FAC in 1941 for the K-Line.  Next was the BLD
(Blue Diamond), a revised FAC with dry liners in 250 and 269".  The BLD
was revised to the BD (also Blue Diamond) series for the L-Line in 1949
with overhead valves and 250 and 269".  These proved to be low in power
so a sleeveless version designated the Black Diamond was introduced in
1952 with 282".  A 308" version was added in 1954 to counter GM's 302"
engine and it appears that the SD-220 and 240" engines became Black
Diamonds for 1955.  Built thru 1962.

The IH 6 cylinder engines were replaced with the AMC 6-232 in 1969.

The FB3 valve in head, 279" engine became the FBB, 298" wet sleeved
engine, followed by dry sleeved 361, 401, and 450" versions.  These
became the FBC series for the K-Line in 1941.  This led to the RED series
in 1942 in 361, 401, and 450", followed by the RD Series in 372, 406, and
450".  A sleeveless RD-501 was added in 1954 (501 was built by
someone else).  Production ended in the mid-1970s.

The LV-8 series in 401, 461, and 549" sizes was introduced in 1956, 478"
was added in 1964, shortened VS- versions were added for the Fleetstar in
1965 and 537 and 605" versions in 1975.

The DV-550 Series, a dieselized version of the LV-8 in 462 and 550" sizes
came in1966.  The DV-550B appeared in 1971.  These became the D-150, 170,
and 190 Series in 1975 and was further upgraded to the 9.0L Series in
1980.  Production of this series ended about 1985.

The SV-8 engine was introduced in 1959 in 266, 304, and 345" sizes, with
a 392" added in 1966.  Cutting these in half resulted in the 4-152 in
1961 and the 4-196 in 1966.  Lighter duty versions of the (304?) and 345
were added in 1975

A new MV-8 series was introduced in 1974, 404 and 466" and replaced the
RD series 6 cyls.  A dieselized version, the 6.9L version appeared in
1982, becoming the 7.3L in 1988, and the T444 in 1993.  The 6.0L version
was introduced in 2002?, the 6 cyl version was dropped by Ford in 2003,
but continued by Navistar.

Production of all IH Gasoline engines ended in 1984.

The DT-466 appeared in trucks in 1975, having first been used by Ag and
Construction Equipment in 1968.  This was followed by a DT-360 in 1986
(thru 1994) and revised Diesel series of 408, 466, and 530" sizes in
1993.  Electronically controlled fuel systems were added in 1994.

(Data compiled from various sources including Crismon's "International
Trucks".
Accuracy of dates is not guaranteed!)

Powerstrokes--1st Prod. early 1994, full prod July, 1994 , Electronic
versions--1995, 6.0L--2001 or 2

New 466/570 series in 2004

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