FarnorthMN Posted Friday at 03:14 AM Share Posted Friday at 03:14 AM Can anyone tell me if there is a way to check and see what my E6 4V is set to for HP? I'm assuming 350HP. The engine serial Number plate has been wore off so It's unreadable. Was wondering if there is a way to check by maybe looking at the postion of the fuel rack in the injection pump? Not a huge deal if i can't would just be nice to know going forward. Thanks again everyone. Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/ Share on other sites More sharing options...
BOBWhite Posted Friday at 03:42 AM Share Posted Friday at 03:42 AM Door plate tag or Injector pump tag might reveal something if they aren't worn off too. Someone here might be able to decode that injection pump tag but not sure. Best of luck 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586594 Share on other sites More sharing options...
FarnorthMN Posted Friday at 03:47 AM Author Share Posted Friday at 03:47 AM 3 minutes ago, BOBWhite said: Door plate tag or Injector pump tag might reveal something if they aren't worn off too. Someone here might be able to decode that injection pump tag but not sure. Best of luck Thanks @BOBWhite I will get some pictures of the pump and door tag tomorrow. Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586595 Share on other sites More sharing options...
Popular Post mrsmackpaul Posted Friday at 07:15 PM Popular Post Share Posted Friday at 07:15 PM Plate looks like a virgin that has never been stamped Paul 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586609 Share on other sites More sharing options...
FarnorthMN Posted Friday at 09:03 PM Author Share Posted Friday at 09:03 PM 1 hour ago, mrsmackpaul said: Plate looks like a virgin that has never been stamped Paul what are you thinking? there is some other "printed" info thats not stamped like vlave lash. Maybe remack? I can find a remark sticker anywhere, if I remember right they put them on the rear valve cover area. Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586614 Share on other sites More sharing options...
Joey Mack Posted Friday at 10:09 PM Share Posted Friday at 10:09 PM Did you look in the 4Valve book I sent to you, to see if there is info on how to I.D. the engine.? I would open my copy, but we just took that room apart, and all the books in there are in a tote.. Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586630 Share on other sites More sharing options...
mrsmackpaul Posted Saturday at 04:01 AM Share Posted Saturday at 04:01 AM 6 hours ago, FarnorthMN said: what are you thinking? there is some other "printed" info thats not stamped like vlave lash. Maybe remack? I can find a remark sticker anywhere, if I remember right they put them on the rear valve cover area. Im thinking you need to give us more details Whats the truck, body truck or prime mover (tractor) What transmission What model truck Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586665 Share on other sites More sharing options...
FarnorthMN Posted Saturday at 04:07 AM Author Share Posted Saturday at 04:07 AM 5 hours ago, Joey Mack said: Did you look in the 4Valve book I sent to you, to see if there is info on how to I.D. the engine.? I would open my copy, but we just took that room apart, and all the books in there are in a tote.. I have thumbed through it doesn't give me much on diffrent HP ratings. I have a feeling I can find more out in a pump book. I will get some info on the pump tomorrow and do some more research and let you know. Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586667 Share on other sites More sharing options...
FarnorthMN Posted Saturday at 04:16 AM Author Share Posted Saturday at 04:16 AM 5 minutes ago, mrsmackpaul said: Im thinking you need to give us more details Whats the truck, body truck or prime mover (tractor) What transmission What model truck Paul Sorry Paul should have gave that info right off the bat. 1986 Mack Superliner RW613 Mack E6 4V HP?? Assuming 350HP Mack T2090 9 speed mack 4.64 rears with Neway air ride Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586668 Share on other sites More sharing options...
mrsmackpaul Posted Saturday at 04:24 AM Share Posted Saturday at 04:24 AM What year is it Assuming now it's either a Thermodyne or a Econodyne Tip turbine or chassis mounted intercooler ? I am assuming the inter cooler is in front of the radiator Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586670 Share on other sites More sharing options...
FarnorthMN Posted Saturday at 04:34 AM Author Share Posted Saturday at 04:34 AM (edited) 1986 I believe assuming the engine has never been replaced. the intercooler is mounted to front side of the cooling package. Edited Saturday at 04:36 AM by FarnorthMN Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586673 Share on other sites More sharing options...
FarnorthMN Posted Saturday at 04:40 AM Author Share Posted Saturday at 04:40 AM @mrsmackpaul Econdyne but that i am unsure of. Econdyne was the first of the 4v from what I understand. I Apologize for my ignorance Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586674 Share on other sites More sharing options...
mrsmackpaul Posted Saturday at 07:21 AM Share Posted Saturday at 07:21 AM With it been a 9 speed I doubt it's a Maxidyne Not sure when the Econodyne arrived on the scene, I think it is pretty safe to assume that if it is intercooled from in front of the radiator it is either a 300 or a 350 Thermodyne or Econodyne Either are good motors and wont disappoint the user thats after a old fashioned mechanical motor with a hairy chest and a decent set of balls Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586678 Share on other sites More sharing options...
FarnorthMN Posted Saturday at 01:26 PM Author Share Posted Saturday at 01:26 PM @mrsmackpaul correct me if im work but what I understand the Econodyne was the most the 4v engines. I could be remembering wrong. I will do some more research on the pump and see if I can find somthing on HP/fuel ratings and let you guys know. Thanks for your help! Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586680 Share on other sites More sharing options...
mrsmackpaul Posted Saturday at 05:07 PM Share Posted Saturday at 05:07 PM I couldn't advise properly on that as Mack Australia offered a very different line of trucks than the U.S. I'm fairly certain the Econodyne arrived towards the end of the E6 in Australia Could still get Maxidyne and Thermodyne in the 4 valve Not even sure what the difference is between a Thermodyne and Econodyne apart from the name I only recall seeing Econodyne when the Valueliner arrived on the scene in Australia, thinking 86 onwards for some reason Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586689 Share on other sites More sharing options...
Popular Post 85snowdog Posted Saturday at 06:59 PM Popular Post Share Posted Saturday at 06:59 PM This was an interesting question. I have both here, so I went to see if I could find any easy differences between them . The only thing I could see was the turbo was bigger on the 350 . I never thought to look at the injector pump , like Bob White mentioned. I can do that though. I can't see the truck leaving the factory without the tag marked properly , so maybe it is a rebuild of some type . I attached pics of my engine tags and pics of the turbos Not sure if it will help or confuse things more 😀 This is the 350 turbo in a 1986 RD This is the 300 turbo in a 1988 DM 2 1 Quote Keith Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586690 Share on other sites More sharing options...
mrsmackpaul Posted yesterday at 12:23 AM Share Posted yesterday at 12:23 AM Just watching this, we were calling them Econodyne in 86 Paul 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586716 Share on other sites More sharing options...
85snowdog Posted 20 hours ago Share Posted 20 hours ago I got some more pics to either help or confuse . Hopefully help These tags are on the 350 engine , Pump Turbo Looks like the model is S4A-008 and these tags are on the 300 pump Turbo Looks like it may say the model is S3A 009 I noticed the tag on the block of the 350 says initial injection timing is 20 and the tag on the pump said the same . And the tag for the 300 said 21 and that was on the 300 pump. 1 Quote Keith Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586749 Share on other sites More sharing options...
Popular Post 85snowdog Posted 20 hours ago Popular Post Share Posted 20 hours ago (edited) I realize this won't help you because you don't have a stamped engine tag. But looking at the tags I posted for you , I noticed the 300 4 valve was an EM6-300L. I knew the M was for maxidyne, but didn't realize they would have still have them in 88. And the L at the end had me really confused . So I looked in my books and came up with this . I found it interesting so wanted to share. Edited 18 hours ago by 85snowdog 3 Quote Keith Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586750 Share on other sites More sharing options...
mrsmackpaul Posted 17 hours ago Share Posted 17 hours ago Found this from some Googling about May or may not help Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586756 Share on other sites More sharing options...
FarnorthMN Posted 13 hours ago Author Share Posted 13 hours ago On 12/6/2025 at 12:59 PM, 85snowdog said: This was an interesting question. I have both here, so I went to see if I could find any easy differences between them . The only thing I could see was the turbo was bigger on the 350 . I never thought to look at the injector pump , like Bob White mentioned. I can do that though. I can't see the truck leaving the factory without the tag marked properly , so maybe it is a rebuild of some type . I attached pics of my engine tags and pics of the turbos Not sure if it will help or confuse things more 😀 This is the 350 turbo in a 1986 RD This is the 300 turbo in a 1988 DM wow this topic really blew up. Sorry for the delay! I haven't had a chance to get home in the last 2 days but I did zoom in on a picture I had on my phone and the compressor side of my turbo has a curve like your 300HP does. I do know that is more of application specific though. Depending on what application the engine was used for and how the charge pipes a route in that application, but I could be wrong. the turbine side of mine appears to be a little bigger then your 300HP so kinda tough to say. When I get home in the A.M. I will check out all the other tags and compare. really appreciate it @85snowdog. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586764 Share on other sites More sharing options...
FarnorthMN Posted 13 hours ago Author Share Posted 13 hours ago 4 hours ago, mrsmackpaul said: Found this from some Googling about May or may not help Paul @mrsmackpaul I read the form and it sounds like im kinda right about the 4v being the the first econodyne, but I always wondered if there was an overlap from the Maxidyne and the econdyne with the 4 valave head. like I told @85snowdog I will be in the shop tomorrow. I have to peal rubber off all 10 rims since I am switching to 11r24.5 tires ( not my most favorite job...😡😡) I will see if i can find any more tags on the engine. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586765 Share on other sites More sharing options...
Joey Mack Posted 12 hours ago Share Posted 12 hours ago Looks like a 350 turbo to me. S400 SO 41.. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586768 Share on other sites More sharing options...
FarnorthMN Posted 9 hours ago Author Share Posted 9 hours ago once again thanks @Joey Mack you're a wiz! Quote Link to comment https://www.bigmacktrucks.com/topic/76210-mack-e6-4v-hp/#findComment-586772 Share on other sites More sharing options...
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