Isac Posted June 2, 2020 Share Posted June 2, 2020 But my thing is if the compressor is bad shouldn’t it have coolant in the air tank when I drain them? Quote Link to comment Share on other sites More sharing options...
Nobody454 Posted June 2, 2020 Share Posted June 2, 2020 (edited) air compressor pushes the coolant out the overflow or the cap. its pressurizing the coolant and pushing it out Edited June 2, 2020 by Nobody454 Quote Link to comment Share on other sites More sharing options...
Isac Posted June 2, 2020 Share Posted June 2, 2020 I’ll go ahead and change the air compressor then and see what happens Quote Link to comment Share on other sites More sharing options...
Isac Posted June 2, 2020 Share Posted June 2, 2020 Thanks a lot I’ll give y’all a feed back Quote Link to comment Share on other sites More sharing options...
JKJustin Posted January 14, 2021 Share Posted January 14, 2021 Did the compressor fix your problem? I have a 00 ch613 doing the same thing. Quote Link to comment Share on other sites More sharing options...
Pulling my hair out Posted July 16, 2022 Share Posted July 16, 2022 (edited) On 6/1/2020 at 10:19 PM, Isac said: I’ll go ahead and change the air compressor then and see what happens I have a 2000 RD688 with a 427, before I did anything I put exhaust and compression gas detctor on the Reservoir and showed nothing so I changed my air compressor installed a new waterpump, the housing behind the pump, thermostat, various hoses, flushed all places I could get a hose into. I Still have the problem. Edited July 16, 2022 by Pulling my hair out Truck and engine details with topic Quote Link to comment Share on other sites More sharing options...
Pulling my hair out Posted July 16, 2022 Share Posted July 16, 2022 On 6/1/2020 at 10:19 PM, Isac said: I’ll go ahead and change the air compressor then and see what happens 7 minutes ago, Pulling my hair out said: Before I did anything I put exhaust and compression gas detctor on the Reservoir and showed nothing so I changed my air compressor installed a new waterpump, the housing behind the pump, thermostat, various hoses, flushed all places I could get a hose into. I Still have the problem. Quote Link to comment Share on other sites More sharing options...
D-Day Posted July 17, 2022 Share Posted July 17, 2022 how long has the radiator been in there they do get choked up with deposits over time 2 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted July 17, 2022 Share Posted July 17, 2022 since its an RD, i bet it works in the dirt, and there is a mess between the CAC and the radiator, as well as a clogged radiator, that may need to be boiled. or just buy a new radiator.. did you change the water pump housing because it was cavitated? was the coolant mostly water? when you pulled the thermostat was it hard to get apart and broke when it was apart? I bet you have a viscous fan clutch,,, is it weak? here's a crazy 'Q' has some done a valve adjustment right before it ran hot? it's an E-Tech, so there isnt a whole lot of outside issues that can raise engine temp.. Pretty basic engine.. jojo 1 1 Quote Link to comment Share on other sites More sharing options...
h67st Posted July 17, 2022 Share Posted July 17, 2022 I'm with Joey...make sure both the air side and inside of the radiator are clean. He's got some good ideas about the water pump, tstat, etc. Quote Link to comment Share on other sites More sharing options...
fjh Posted July 17, 2022 Share Posted July 17, 2022 11 hours ago, h67st said: I'm with Joey...make sure both the air side and inside of the radiator are clean. He's got some good ideas about the water pump, tstat, etc. Yup do the simple stuff first rad cap also! 1 Quote Link to comment Share on other sites More sharing options...
Pulling my hair out Posted July 19, 2022 Share Posted July 19, 2022 On 7/16/2022 at 8:17 PM, D-Day said: how long has the radiator been in there they do get choked up with deposits over time Radiator is aluminum and looks brand new and very clean between Radiator and ac core Quote Link to comment Share on other sites More sharing options...
Pulling my hair out Posted July 19, 2022 Share Posted July 19, 2022 On 7/16/2022 at 9:23 PM, h67st said: I'm with Joey...make sure both the air side and inside of the radiator are clean. He's got some good ideas about the water pump, tstat, etc. We changed waterpump and housing behind the pump and still is bubbling Quote Link to comment Share on other sites More sharing options...
Pulling my hair out Posted July 19, 2022 Share Posted July 19, 2022 On 7/16/2022 at 8:30 PM, Joey Mack said: since its an RD, i bet it works in the dirt, and there is a mess between the CAC and the radiator, as well as a clogged radiator, that may need to be boiled. or just buy a new radiator.. did you change the water pump housing because it was cavitated? was the coolant mostly water? when you pulled the thermostat was it hard to get apart and broke when it was apart? I bet you have a viscous fan clutch,,, is it weak? here's a crazy 'Q' has some done a valve adjustment right before it ran hot? it's an E-Tech, so there isnt a whole lot of outside issues that can raise engine temp.. Pretty basic engine.. jojo Truck had no thermostat when purchased and under heavy load on steep grade out of quarry never went over °160, so we put a thermostat in with waterpump, a housing, air compressor...never overheated. There is a new cam kit in the truck by previous owner Quote Link to comment Share on other sites More sharing options...
Pulling my hair out Posted July 19, 2022 Share Posted July 19, 2022 On 7/17/2022 at 8:53 AM, fjh said: Yup do the simple stuff first rad cap also! New radiator cap also Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted July 19, 2022 Share Posted July 19, 2022 (edited) have you tried to test the coolant for exhaust gasses? The last 2 times that , I saw this, it was cracked heads... sorry... not trying build a mountain... jojo Edited July 19, 2022 by Joey Mack Poor spelling 1 Quote Link to comment Share on other sites More sharing options...
880joe Posted July 20, 2022 Share Posted July 20, 2022 Are you sure you got the new thermostat in with the air bleeder to the top 1 Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted July 20, 2022 Share Posted July 20, 2022 What size pulley on the water pump? Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted July 20, 2022 Share Posted July 20, 2022 Nevermind, thought it was an ASET. Disregard. Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted July 20, 2022 Share Posted July 20, 2022 (edited) Very possible you will be pulling your wallet out along with your hair… Edited July 20, 2022 by Onyx610 Spelling Quote Link to comment Share on other sites More sharing options...
Mackpro Posted July 20, 2022 Share Posted July 20, 2022 Make sure you replace the small line that goes from the coolant tank to radiator/upper radiator hose elbow. This line can collapse and cause issues like air pockets and only being able to fill with 2-3 gallons of coolant rather than the 10+ gallons required. The 2000-2001 year model ETECHs had issues with engine blocks not washed out correctly and the sand from where the engine blocks were cast would settle at the back right corner of the engine block and block coolant to the air compressor. Almost always you would find the paint cooked off the head of the air compressor due to it overheating. Twice in one day we had 2 trucks towed in where this happened and the air compressor head gasket blew and pushed coolant back through the fresh air intake pipe which goes around the back of engine and into the back of the intake manifold. Coolant got forced into the #6 cylinder and hydro-locked the engine and bent the #6 connecting rod so bad we had to cut if in half with a torch. Mack came out with a new coolant fitting for the back of the block then later instructed us to run a new air compressor coolant line around the back of the engine and into the water manifold to totally get away from the core sand issues . 1 Quote Link to comment Share on other sites More sharing options...
Mackpro Posted July 20, 2022 Share Posted July 20, 2022 https://www.bigmacktrucks.com/topic/59842-casting-sand/ 1 1 Quote Link to comment Share on other sites More sharing options...
Mackpro Posted July 20, 2022 Share Posted July 20, 2022 SB-261-008 is the service bulletin on the air compressor coolant line re-route . This is the only link I could find online. https://www.yumpu.com/en/document/read/31273801/service-bulletin 2 Quote Link to comment Share on other sites More sharing options...
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