Discussion in '1982-Present GM Diesel' started by muddybuddy, Aug 22, 2006.
whats different about a J code from other 6.2's?
I think there is two. c and j code. c has a round egr thing in the intake not sure how all that works none of my trucks have that. j code witch i think is on all cucvs 6.2s like the ones i have. Does not have the egr. i think it came in 1ton trucks for the most part. someone will please let me know if i am wrong.
Yup. C codes have EGR which recirculates some exhaust gas through the motor to improve emissions and rob power. J codes have none of this crap. As far as I know the intake manifold is the only difference between the two.
oh alright cool. thanks
I heard that the heads or valve sizes are different too on the J code but I can not confirm.
I also have seen more variations but have no idea what they are:
There is a dual plane J code and a single plane J code intake.
I have also seen a high rise and low rise intake, maybe from the hummer or Van 6.2 l.
ididnt know any of that
There are single and dual plain intakes for J codes. I have been told the single planes are a little mo-betta. There are also "low-rise" intakes but they also have the aircleaner stud holes rotated 90 degrees and yes they are from hummers.
i'm pretty sure the j code is only single plane. this and the no-egr is what makes it j code. the j code engines did not have different heads/valves etc.
I've seen GM literature specc'ing the 'J' code as having larger valves. My 'J' code intake is 'dual' plane.
So what are the cucvs? What is duel plane or single for that matter? thx
Wrong. J codes are most deffinately dual and single plain. I'm prety sure they switched to the single plain in 88 or 89 but not possitive. All CUCV's are J code and every one I've seen has the dual plain.
ok, thanks for the info.
thx for the info
Check out the J-code intakes here:
It doesn't show the C-code intake though.
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