msbulldog601 Posted January 14, 2023 Share Posted January 14, 2023 (edited) Hello everyone! I have a 96 Mack CH613 E7 Engine I recently replaced the cooling line that goes from engine to air compressor a month ago. I drained the system to do that. Filled system back up everything was good. Fast Forward right before Christmas I was working got alerts on the dash raised hood up entire engine was wet radiator has a hole in it. I drained system what was left took radiator off got the small hole repaired I put the radiator back on I filled the system up turned truck on drove it up the road temp starts to go up I said okay it did the same thing when I replaced the air compressor cooling hose I need to add more coolant I pull over took the cap off the coolant is still up in the reservoir. I drove the truck back home I said maybe it will gone down once it sits like last time when I replaced the hose and I’ll continue to add more. This time when I let sit overnight go back to truck it’s still up in reservoir that sits on firewall just a little so I think it’s air in the system. What should I do to correct this? Should I drain the entire system and refill it another way? Please help. Thanks. Edited January 14, 2023 by msbulldog601 Quote Link to comment Share on other sites More sharing options...
BOBWhite Posted January 14, 2023 Share Posted January 14, 2023 There's a pretty cool Vacuum fill coolant tool that you can pick up on amazon that does the job the best. You can keep the whole system under vacuum overnight to see if there are any major leaks like head gasket or air compressor also. When you drained the coolant out the second time was it sludgy, black, or seem like combustion gasses had been getting into it? You can send in a sample of your coolant in and have it tested to see if you have to pull the heads. 1 Quote Link to comment Share on other sites More sharing options...
msbulldog601 Posted January 14, 2023 Author Share Posted January 14, 2023 1 minute ago, BOBWhite said: There's a pretty cool Vacuum fill coolant tool that you can pick up on amazon that does the job the best. You can keep the whole system under vacuum overnight to see if there are any major leaks like head gasket or air compressor also. When you drained the coolant out the second time was it sludgy, black, or seem like combustion gasses had been getting into it? You can send in a sample of your coolant in and have it tested to see if you have to pull the heads. Thanks I will have to search for it and no the coolant looked the same as it was when I put it in. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 14, 2023 Share Posted January 14, 2023 If you want to, you can use a 3/8" extension on a breaker bar, and remove the plug on the top of the front water manifold behind the thermostat housing. As you unscrew it and it gets loose you may hear air come out.. leave the plug in just a bit, then when coolant comes out ,, tighten it up.. For years now, when ever I fill an E-7/E-Tech, I always remove that plug.. It saves me time and it does very well at bleeding the air.. Jojo 1 Quote Link to comment Share on other sites More sharing options...
Mark T Posted January 14, 2023 Share Posted January 14, 2023 7 minutes ago, Joey Mack said: If you want to, you can use a 3/8" extension on a breaker bar, and remove the plug on the top of the front water manifold behind the thermostat housing. As you unscrew it and it gets loose you may hear air come out.. leave the plug in just a bit, then when coolant comes out ,, tighten it up.. For years now, when ever I fill an E-7/E-Tech, I always remove that plug.. It saves me time and it does very well at bleeding the air.. Jojo Doesn't hurt to take the blow gun and blow some shop air over the hole Joey's talking about while trying to fill it back up. Quote Link to comment Share on other sites More sharing options...
msbulldog601 Posted January 14, 2023 Author Share Posted January 14, 2023 7 hours ago, Joey Mack said: If you want to, you can use a 3/8" extension on a breaker bar, and remove the plug on the top of the front water manifold behind the thermostat housing. As you unscrew it and it gets loose you may hear air come out.. leave the plug in just a bit, then when coolant comes out ,, tighten it up.. For years now, when ever I fill an E-7/E-Tech, I always remove that plug.. It saves me time and it does very well at bleeding the air.. Jojo Is this the correct plug (see pictures) just want to be sure? Also crack it open with the engine off to burp like normal? Would you drain everything back out then do this process over or is it okay to see will it work with coolant in the system? Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 14, 2023 Share Posted January 14, 2023 Yes Sir !! it works everytime.. no need to drain it, just open it.. Quote Link to comment Share on other sites More sharing options...
msbulldog601 Posted January 15, 2023 Author Share Posted January 15, 2023 2 hours ago, Joey Mack said: Yes Sir !! it works everytime.. @Joey Mack he think it worked for me I drained the system started to pour coolant back in the reservoir until it was full cracked open the plug I did hear our waited until coolant started coming out tighten it back down filled the reservoir all the way back up turn truck on got the temp up drove it up the road temp gauge did go past 180 like it was doing so should be good now. I did end up pulling the plug all the way out the first time although you said leave it in just a bit. Thanks for all the help. 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 15, 2023 Share Posted January 15, 2023 leaving it in just helps from spilling a bunch of coolant.. no biggie.... it should run at 185.. YOUR WELCOME.. Quote Link to comment Share on other sites More sharing options...
msbulldog601 Posted January 15, 2023 Author Share Posted January 15, 2023 12 minutes ago, Joey Mack said: leaving it in just helps from spilling a bunch of coolant.. no biggie.... it should run at 185.. YOUR WELCOME.. yessir spilled a bunch lol thanks again Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 15, 2023 Share Posted January 15, 2023 Any time sir... There is a bunch of us that will offer help. jojo Quote Link to comment Share on other sites More sharing options...
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