Macktruckman Posted August 16, 2023 Share Posted August 16, 2023 Have an E6 2v head I believe has a head gasket leaking compression into the coolant system. I might have access to some 4 valve heads. Could a person put 4 valve heads on my old 2 valve engine? If it’s going to have the heads off anyway I was curious of the differences. Thank you all in advance. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/ Share on other sites More sharing options...
Joey Mack Posted August 16, 2023 Share Posted August 16, 2023 Interesting question.. I know that if you have 18 bolt heads, its a no-go.. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537086 Share on other sites More sharing options...
Macktruckman Posted August 16, 2023 Author Share Posted August 16, 2023 Engine was originally a 1980 EM6-285 I think 20 bolts? Not positive Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537136 Share on other sites More sharing options...
terry Posted August 17, 2023 Share Posted August 17, 2023 21 hours ago, Macktruckman said: Have an E6 2v head I believe has a head gasket leaking compression into the coolant system. I might have access to some 4 valve heads. Could a person put 4 valve heads on my old 2 valve engine? If it’s going to have the heads off anyway I was curious of the differences. Thank you all in advance. Probably depends if the 4 valve heads are for a E6 or E7 engine. terry Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537161 Share on other sites More sharing options...
fjh Posted August 17, 2023 Share Posted August 17, 2023 Not worth the chance in my mind !just by the right ones! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537190 Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 (edited) I wish I was smarter on these differences, but i think the liner protrusion is a different shape/style between E-6 and E-7. the 4V heads have a fire ring groove to seal the fire ring to the top of the liner, that I beleive the E-6 (2V) doesnt have.. Man I wish I could just blurt it out like I can on an E-Tech.. here are 2 pics from my books, E-6 + E-7 I was also thinking about bore diameter.. Edited August 17, 2023 by Joey Mack Pour sperring Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537194 Share on other sites More sharing options...
Macktruckman Posted August 17, 2023 Author Share Posted August 17, 2023 Thank you guys. The heads I was considering are 4v E6. Going on a E6 that is 2v. I don’t have any E7 parts at all. Just some E6 stuff and old 237 stuff And thank you for the specs Joey I’ll save that. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537216 Share on other sites More sharing options...
Joey Mack Posted August 17, 2023 Share Posted August 17, 2023 Its all good.. I wish I knew the answer (100%)... 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537217 Share on other sites More sharing options...
fjh Posted August 18, 2023 Share Posted August 18, 2023 14 hours ago, Joey Mack said: Its all good.. I wish I knew the answer (100%)... Me too Joe never tried the swap before ! Just as a Note thou E6 2v still has fire rings ! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537281 Share on other sites More sharing options...
Joey Mack Posted August 18, 2023 Share Posted August 18, 2023 (edited) ok. i wasnt sure... I had to go out to my shop to look at the 2V heads that I have and the gasket sets. they have grooves and rings, but i thought the machine shop added them. for updated head gaskets.. I guess I need to go ahead and build that E-6 after I finish the E-Tech that is in there now. Thanks, Jojo Edited August 20, 2023 by Joey Mack Pour sperring 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537282 Share on other sites More sharing options...
fjh Posted August 20, 2023 Share Posted August 20, 2023 Yup you get on that bro! 😁I'm Going to go play on the Case for a bit today Tring to get some seat time been busy with other stuff lately winters coming and got to get my wood shed full! If we don't get burned out here. the whole dam province is on fire ! We have been spared here So far However if its only a mater of time If the heat keeps up! A lot of stupid people out there ! Not to mention the accidental shit that happens Car fires etc. that can cause a hell fire! The last major fire here on VI was in the 1800s WE ARE DUE! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537427 Share on other sites More sharing options...
Joey Mack Posted August 20, 2023 Share Posted August 20, 2023 10-4.. I have been trying to get some repairs on the house, additions an improvements to my shop, and some relaxation in the pool.. when the weather cools down below the mid 90's, I will get these engines built.. It's been blazing hot. 60+ days above 90, has worn me out. Have fun with the Case.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537428 Share on other sites More sharing options...
fjh Posted August 20, 2023 Share Posted August 20, 2023 👍 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537430 Share on other sites More sharing options...
Macktruckman Posted August 29, 2023 Author Share Posted August 29, 2023 Got around to pulling my heads. Appears to have small crack fro injector to intake valve on a couple cylinders and number 4 liner is cracked at the top pretty bad. Are these EM6-285’s wet or dry liners? Any help is much appreciated Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537890 Share on other sites More sharing options...
terry Posted August 29, 2023 Share Posted August 29, 2023 4 hours ago, Macktruckman said: Got around to pulling my heads. Appears to have small crack fro injector to intake valve on a couple cylinders and number 4 liner is cracked at the top pretty bad. Are these EM6-285’s wet or dry liners? Any help is much appreciated Should be a dry liner, i believe the E7 was the start of a wet liner. terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537897 Share on other sites More sharing options...
Macktruckman Posted August 29, 2023 Author Share Posted August 29, 2023 Thank you. I wonder if it would be much trouble to replace the EM6 with a E7 engine? If it’s not bad can a 1996 E7-454 be converted to a mechanical without breaking the bank? Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537904 Share on other sites More sharing options...
Joey Mack Posted August 29, 2023 Share Posted August 29, 2023 I think the injection pump timing will have to be changed, around 5 degrees I think, since you will eliminate the the econovance.. I did one a few years ago. I also took the timing pointer on the front of the engine off the bad engine and moved it to the good engine. I did have to drill and tap the threads in the timing cover so I could mount the pointers. there are 2 round reliefs cast into the timing cover where the pointer goes.. fuel lines will be different. I wish I was smarter about injection pumps.. But there are a few on here that are very smart about them.. Jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537905 Share on other sites More sharing options...
Macktruckman Posted August 29, 2023 Author Share Posted August 29, 2023 Thank you guys. Since the old E6 is in such bad shape I would love to use this opportunity to upgrade to an E7 if possible. I just don’t know much about interchangeability Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537909 Share on other sites More sharing options...
Macktruckman Posted August 29, 2023 Author Share Posted August 29, 2023 It’s a tractor that pulls an equipment trailer and also an end dump so some more power would be appreciated Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537910 Share on other sites More sharing options...
Joey Mack Posted August 29, 2023 Share Posted August 29, 2023 look at the front engine mount and the cross member to get it done.. dont sweat it.. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537911 Share on other sites More sharing options...
JoeH Posted August 30, 2023 Share Posted August 30, 2023 What year and model is your truck? With the right donor truck you could pick up much of what you'd need. Mack used a lot of components over and over across multiple models and decades. What trans do you have? Might be prudent to switch to an EM7-300 if your current rig is a maxidyne. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537925 Share on other sites More sharing options...
JoeH Posted August 30, 2023 Share Posted August 30, 2023 Just read it over, you'd switch from an em6 to an e7-454. You'd need to swap transmissions too, which may affect trans mounts and would definitely affect driveshaft length. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537926 Share on other sites More sharing options...
Macktruckman Posted August 30, 2023 Author Share Posted August 30, 2023 The transmission is an Eaton RTO-14909MLL that I put in a few years ago when I swapped cabs out on the truck it was taken from a later model Mack mixer truck with an E7 so it bolted right in. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537931 Share on other sites More sharing options...
Macktruckman Posted August 30, 2023 Author Share Posted August 30, 2023 Is the E7 longer than my current EM6? Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537932 Share on other sites More sharing options...
JoeH Posted August 30, 2023 Share Posted August 30, 2023 What model truck are you running? RD? DM? The engine may be a little longer, but it is longer towards the front not the rear. The front engine mount and fan assembly are more compact to account for length difference. Quote Link to comment https://www.bigmacktrucks.com/topic/73177-4v-vs-2v-interchangeability/#findComment-537963 Share on other sites More sharing options...
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