Magilla Posted January 13, 2023 Share Posted January 13, 2023 G’day guys n gals, I have a 1998 Mack CH613 EA7 410 with coolant leak. Had a a few codes read ‘17’ coolant low, after first noticing low in main tank ok in overflow. Started putting about 1 - 2 litres in main tank each morning, no external leak obvious. Truck sat idle over Christmas & new year. Just put about 15 litres in main tank, checked oil level, really high on stick but no sign of water in oil, no bubbles or milk appearance. Thinking head gasket but reading forum post noticed compressor is also water cooled. Appreciate any feedback, thanks. Quote Link to comment Share on other sites More sharing options...
Adkat Posted January 13, 2023 Share Posted January 13, 2023 Hunt down someone with a pressure tester and check the cooling system for any external leaks, then If it's swallowed 15 litres sumps probably full of water. Best bet is to drain oil and pull filters to see what's in them. Then pull sump off, and pressure test cooling system, watch to see where the water runs from. Will give you a good idea of where to start. Quote Link to comment Share on other sites More sharing options...
BOBWhite Posted January 15, 2023 Share Posted January 15, 2023 If the oil didn't seem milky then that probably means it just hasn't been stirred up yet. Oil floats on top of coolant so you won't be able to tell by just checking the oil. Could be head gasket, cracked head, or a busted liner but I think it's best if you pressure or vacuum test the system. 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 15, 2023 Share Posted January 15, 2023 after the truck sits for a day, loosen the oil drain plug.. if there is coolant in the oil it will be at the bottom, and it will sneak around the threads of the plug before you remove it.. jojo Quote Link to comment Share on other sites More sharing options...
Solution Mark T Posted January 15, 2023 Solution Share Posted January 15, 2023 Sounds like a good time to take the oil pan off it, pressurize the cooling system and see where it seems to be coming from..... then get ready to spend some money. 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Vmac3 Posted January 15, 2023 Popular Post Share Posted January 15, 2023 While pressure testing the cooling system you see coolant coming out of the engine oil pick-up tube, then more than likely you have a bad engine oil cooler. V 3 Quote Link to comment Share on other sites More sharing options...
fjh Posted January 16, 2023 Share Posted January 16, 2023 Pull the cap off the crank case vent see if it’s slimy! 1 Quote Link to comment Share on other sites More sharing options...
Mark T Posted January 16, 2023 Share Posted January 16, 2023 Probably rotted by the bottoms of the liners. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 16, 2023 Share Posted January 16, 2023 Well Mark, if that's the case.... He is gonna need one of these.. or someone who has one.. I hope it's not that bad.. jojo Quote Link to comment Share on other sites More sharing options...
fjh Posted January 16, 2023 Share Posted January 16, 2023 11 hours ago, Joey Mack said: Well Mark, if that's the case.... He is gonna need one of these.. or someone who has one.. I hope it's not that bad.. jojo You might want to go on a service call to the land of Auz Buddy! 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 16, 2023 Share Posted January 16, 2023 Australia is the only far away land I would love to see........... I hope he finds a simple issue here, Maybe the oil cooler went bad. I wonder if there is oil in the coolant? Quote Link to comment Share on other sites More sharing options...
Mark T Posted January 16, 2023 Share Posted January 16, 2023 If that is the issue, and that tool comes into play ? someone's gonna have awfully sore arms by the time it's all done Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 16, 2023 Share Posted January 16, 2023 too funny,, It's not that bad, really.. of course my cutters are new and very sharp.. I only take .002" per cut.. It takes a bit longer but there is no fetching up to cause a washboard in the cut.. Quote Link to comment Share on other sites More sharing options...
Magilla Posted February 26, 2023 Author Share Posted February 26, 2023 Thank you all for your sound advice. I took off the sump and had a good look, found No 6 liner leaking. Took off head and bolts didn’t look good on strip down, sure enough exhaust gases have been in coolant journal, head cracked. Inspection of liners and pistons revealed the old girl needs a rebuild. Been searching for a remanufactured motor Australia wide since but no luck. Cost of parts for rebuild outweighs value of truck and can’t get a number of parts anyway, parts I could source, not including heads and cam shaft, amounted to nearly $40k before a spanned had even been lifted. As a matter of interest Australian ex military Mack CH 2001 model 435hp tipper with low kilometres and hours sold at auction for $161000 not including 8.5% buyers premium plus registration and transfer cost, not much change out of $200,000.00 for a 23 year old truck.🤩 Not sure what things are like in the Northern hemisphere but second hand machinery here is still selling at a premium. Rolling the dice now searching for a second hand motor out of a wreck. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted February 26, 2023 Share Posted February 26, 2023 that is $108,000.00 - $134,000.00 U.S.D. WOW !!!!!!! for a used truck,,,??? Quote Link to comment Share on other sites More sharing options...
Magilla Posted February 27, 2023 Author Share Posted February 27, 2023 Yes Joey, 22 years used. Quote Link to comment Share on other sites More sharing options...
Adkat Posted February 27, 2023 Share Posted February 27, 2023 You must be pricing your parts from a mack (Volvo) dealer. Waste of time. I priced PAI Rebuild kit for etech late last year, $4500 and crankshaft for $5k. Depending where you are, there's a few blokes parting out engines, and a few good second hand ones around at reasonable prices, nothing anywhere near $40k Quote Link to comment Share on other sites More sharing options...
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