Rob Posted February 13, 2012 Share Posted February 13, 2012 When were the E7 series engines replacing the E6 series?Also when were the E6 w/four valve heads replacing the two valve head engines?Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Timothy Maikshilo Posted February 13, 2012 Share Posted February 13, 2012 This is a good one to ask, Fullfuel01. Quote Link to comment Share on other sites More sharing options...
rick harper Posted February 13, 2012 Share Posted February 13, 2012 The six cylinder 4V head was introduced in 83/84 area. The E7 were introduced in 89/90 area Quote Link to comment Share on other sites More sharing options...
storkmack Posted February 14, 2012 Share Posted February 14, 2012 There was some overlap on the E-7/E-6's. We had an 91' CH that was an E-7 and a 91' RD that is an E-6. -Brad Quote Link to comment Share on other sites More sharing options...
b61mack Posted February 14, 2012 Share Posted February 14, 2012 There was some overlap on the E-7/E-6's. We had an 91' CH that was an E-7 and a 91' RD that is an E-6. -Brad At work we have a 90 CH612 with a E6 350 4 valve, i have a 84 Mh that has a E6 350 two valve. Quote Link to comment Share on other sites More sharing options...
Rob Posted February 14, 2012 Author Share Posted February 14, 2012 Hi Brad, when I had seen similar I thought the truck was a repower. I'm thinking the truck was a 92, and know it was an RD600. It had an E6, 4 valve heads.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
bubbamobilin Posted February 14, 2012 Share Posted February 14, 2012 We had 2 1990 RD's with E6 300M's(4V heads) and T2070's but we also had a 1989 Superliner with and E7 400. Quote Link to comment Share on other sites More sharing options...
41180 Posted February 14, 2012 Share Posted February 14, 2012 we had a 91 ch with a e7 400 mechanical that thing would out pull 475 cats. my dad bought his superliner in 89 they gave him the option to wait a few months for the e7 400 or buy the e6 350 he went with the 350. he kicked himself later on. lol. he then put a e9 500 in the superliner in 97 its still running strong Quote Link to comment Share on other sites More sharing options...
maxidyne237 Posted February 14, 2012 Share Posted February 14, 2012 We had an 86 Rd with a 350 tip turban 2valve. I also have a 86 R611T with a 250 2 valve. I think there was definately some overlap in the ending of 2valve and 4 valve. There was also overlap in the use of front mount intercooler and tip turban usage on 2 valves. Quote Link to comment Share on other sites More sharing options...
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