What Year Was The E7 Introduced?

[ThaddeusW]

What year was the E7 introduced and what year did it get electronics? What was the difference between the E7 and E6?

Also what was the last year for the E9 here in the states?

[chris88]

Cant help you with years but the E6 was 673 or so cu in and E7s are 728 cubic inches.

[HK Trucking]

The E7 came out around late 89, early 90 or so.

E6 =672 cu. in.

E7 = 728 cu. in.

They made the E7 both mechanical and electronic up til at least the mid 90's, then all electronic.

I'm not much into the V8's so not sure on the last E9.

[Maxville Truck]

e-6 and e-7 share the same piston diameter

e-6 is a dry sleeve engine

e-7 is wet sleeved, has buttressed main bearing's (bolts come in from the sides in addition to bolted from the bottum, makes for a stronger bottum end, my local dealer told me an e-6 is reliable up to 350hp, and an e-7 goes well beyond that) also the e-7's stroke is 1/2 inch longer hence the additional cubic inch. also e-7 is all metric bolted.

e-6 is good for 15,000hrs while an e-7 is good for 30,000hrs (don't know if thats true or not) I run both in gruelling conditions, dirty, long oil change intervals, my e-7's start down to below zero conditions without the addition of "summer air", while my e-6's typically need some around 30 degrees.

[chris88]

I think mechanical e7's last year was 97 or 98. We had a 97 RD with a mechanical e7. As far as hours go we have a CL with an E7 460hp with 21k hours on it. 560 or so thousand miles.

[mudslut28]

That sounds encouraging cause my E7 is up to almost 17000 hours now. I change ALL filters every 250 hours. Maybe wasteful but definitely cheaper than the alternative.

[Mack700]

Hello !!! I think the last year for the E9 was 1994 or 1995 I got one in my 95 CL but I put it in, :bmod2: it was a glider kit just majored it had 977,500 miles on it but once you got one there is no going back to the 6 cyl.

[mackcl96]

1998 was last year for E9 some leftovers were titled as 1999

[chris88]

I shouldnt have said anything, that E7 that i was talking about with 560k miles on it just dropped a valve a couple days ago.