Did all 1992 1993 come IC'ed ??

 

yes

 

k I know you could order IC in the 90 91 weird part is I was told this truck is a 1991 but the vin is coming up 93 and it has being licensed and insured



edit : And the truck is super straight

 

I take it, it's not intercooled?

 

Bingo have to take a closer look

 

Mysterious...

 

I never knew of I/C being an option; it's presence or lack thereof was due to date of manufacture.

Often, on parts web-sites, when providing year-model information, it will ask you for one of two VIN options, either "C" or "8"; I don't know which option denotes I/C, nor exactly where in the VIN sequence this "C" or "8" is found.

There are several differences in parts according to whether the truck is non-I/C or I/C, such as the radiator and therefore any hoses, fan-clutch and fan, belt length, fan-hub bracket, etc.

The 1991 non-I/C radiator has the top and bottom hoses both on the right side.

The 1991.5 I/C and subsequent 1992 and -93 has a "cross-flow" radiator, having the top hose on the left and bottom hose on right.

Early 1991 trucks were non-I/C, yet they had the later I/C grille also found on 1992 and 1993 models.

Late 1991 trucks, commonly denoted 1991.5 when discussed, were I/C.

Late 1991 I/C trucks are rather unique, in that they still share many attributes of the non-I/C trucks, such as external voltage regulators.

It is not un-common to come across trucks that started life as I/C; but, due to either the I/C developing pin-holes, or getting a fence-brace or such shoved through it, the owner opted to install a non-I/C cross-over, rather than suffer the expense of I/C replacement; a dead give-away for this is often the presence of the later I/C style radiator.

 

Also, if the title and VIN calls for a later model I/C truck, yet it is definitely a non-I/C engine, it is likely that the engine was swapped at some time for whatever reason.

If that were the case, then it is altogether possible that, although the engine may be non-I/C, the I/C itself could very well still reside behind the grille.

ALL non-I/C engines had the good double-diaphragm vacuum-pump; all I/C engines had the simple vane-type vacuum-pump.

 

May have been revinned and retitled, and all the owner could find was 93 stuff.

Most likely had an engine swap though....

 

Wouldn't pulling an injector for it's size put this mystery to bed?

 

Or just look at the CPL # on the data plate...

Definitely not an option: intercooling was mandated by the EPA as a smog device, NOT a power enhancement. Lower NOX emissions.

 

The CPL is the build code for the engine and the year of manufacture. If the engine ever puked the KDP the gear timing case could have been changed which means the engine can end up having the wrong CPL tag. Also over the years heads can get changed, engines can get swapped, cabs can get changed. There are a lot of "mutt" trucks running around out there. A lot of them are owned or modified by the same people who are members of this forum.

 

no I/C for the 90 early 91 91.5 up all I/C
maybe some one did some parts changing before you got it?