Moparmike Posted November 10 Share Posted November 10 (edited) The cooler on the bottom of my engine on driver side if I open the pit cock on it shouldn’t I get water out of it transmission cooler there’s nothing coming out of it even when truck is running I’m trying to drain coolant and change it out Edited November 10 by Moparmike Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/ Share on other sites More sharing options...
fjh Posted November 10 Share Posted November 10 Maybe plugged! Take the whole fitting out! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561677 Share on other sites More sharing options...
Joey Mack Posted November 10 Share Posted November 10 I bet the pet cock pee holes are clogged with that coolant conditioning powder that comes in the filter kits.. Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561678 Share on other sites More sharing options...
Moparmike Posted November 11 Author Share Posted November 11 5 hours ago, fjh said: Maybe plugged! Take the whole fitting out! I removed the fitting completely and nothing came out Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561686 Share on other sites More sharing options...
Moparmike Posted November 11 Author Share Posted November 11 5 hours ago, Joey Mack said: I bet the pet cock pee holes are clogged with that coolant conditioning powder that comes in the filter kits.. Hey Joey Mack you wanna replace the rear suspension bushings and u bolts for me Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561687 Share on other sites More sharing options...
JoeH Posted November 11 Share Posted November 11 Coolant drain is a petcock on the lower radiator hose/tube. Approximate location is under the alternator. I assume this is the petcock you're attempting to get coolant out of? Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561699 Share on other sites More sharing options...
Moparmike Posted November 11 Author Share Posted November 11 5 hours ago, JoeH said: Coolant drain is a petcock on the lower radiator hose/tube. Approximate location is under the alternator. I assume this is the petcock you're attempting to get coolant out of? Yes sir there’s the radiator hose that runs to the cooler then there’s a set of transmission lines that goes to the cooler and a line that runs to the reservoir tank on the firewall all comes off the cooler that the petcock is in but can’t get anything to come out when I open it or even take it out im thinking that it’s only cooling part of the system since it seems stopped up Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561725 Share on other sites More sharing options...
Joey Mack Posted November 11 Share Posted November 11 have you pokes a small pick or something up in the hole? Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561732 Share on other sites More sharing options...
Moparmike Posted November 11 Author Share Posted November 11 1 hour ago, Joey Mack said: have you pokes a small pick or something up in the hole? Yes sir couldn’t get anything in it and didn’t want chance putting a hole in it I think I’ll just remove the cooler and see what’s going on I price it online 1200 smh lol but I know it’ll make a difference in the temp I’m sure it runs around 180 all the time looking at gauge but it’s not cooling the entire motor I worked it today put my hand on the radiator hose (bottom) and it’s hot put my hand on transmission lines just warm and the cooler is not hot Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561736 Share on other sites More sharing options...
Moparmike Posted November 11 Author Share Posted November 11 That’s what it looks like Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561737 Share on other sites More sharing options...
Joey Mack Posted November 11 Share Posted November 11 maybe you will find a clog and clean it out for re-use. Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561743 Share on other sites More sharing options...
Moparmike Posted November 12 Author Share Posted November 12 2 hours ago, Joey Mack said: maybe you will find a clog and clean it out for re-use. I sure hope so Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561765 Share on other sites More sharing options...
JoeH Posted November 12 Share Posted November 12 My '95 is only a 350, doesn't have that trans cooler thing. Dumb question, is it actually plumbed with coolant or has it been bypassed? Again, I'm sure that's a dumb question. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561775 Share on other sites More sharing options...
Moparmike Posted November 12 Author Share Posted November 12 28 minutes ago, JoeH said: My '95 is only a 350, doesn't have that trans cooler thing. Dumb question, is it actually plumbed with coolant or has it been bypassed? Again, I'm sure that's a dumb question. No it’s plumbed with coolant it has a radiator coming from lower radiator that goes to it then another radiator hose off the top that goes to the oil cooler As well I believe it has 5/6 different hoses that comes off of it Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561780 Share on other sites More sharing options...
Adkat Posted November 13 Share Posted November 13 Yeah that thing looks like a headache. Most of our trucks over here run a cooler in front of, or below, the radiator. Kinda the same as this. At least there can't be any contamination of fluids if it fails. Easy enough to swap out your one with a piece of pipe and run some hose extension to mount a cooler up front. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74734-2000-mack-rd-688-e7-water-out-of-cooler/#findComment-561850 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.