Heater core leaking

This topic contains 5 replies and was last updated by will-tilley 8 years 11 months ago
Author
will-tilley
February 4th, 2013 12:13am
Post
I have a problem with a heater core on a Kobelco 210LC mark 8 excavator.When the origional core gave out I replaced it and got about two weeks out of the new one and it started to leak.Warranty gave me a new one and that lasted about a week and that one started leaking.I put shut off valves on the hoses so we could continue to use the machine.Without the core the machine runs fine and if I had engine problem it should show up but nothing.I was wondering if anyone else has had a problem like this?I am wondering if it is just a bad batch of cores?
joseph-toth
February 4th, 2013 7:47am
Is there a copatibility issue between antifrezeer composition and cooler material (the newone)?
john-whelan-2
February 17th, 2013 6:00am
Will I would guess you're getting inferior quality cores. I had a problem with GM cores one time and just kept changing them until I got a good one. A pain in the tush but the dealer thankfully sympathetic. There is no way to foul up installation of a heater core so the only answer is poor quality material or assembly.
andy-stoecklin
March 10th, 2013 5:23pm
Hi Will,



I had that problem once before. I am a Kobelco tech and I remember this problem from a little while ago. If you look at the heater core, no wonder its leaking. The whole airbox in that machine is a problem. Unfortunately I cant exactly remember what the solution to the problem was. Maybe the rad cap? Also this machine does not use a heater valve, It just mixes the air to obtain the desired temperature.

I will find out how we resolved this issue and let you know.
will-tilley
March 15th, 2013 11:22pm
Hey Andy I look forward to hearing from you on this problem.Our Kobelco dealer recently went under and now the Case dealer is filling in until a dealer becomes availible. I got them to check into it and they came back with left over casting sand in the block which is now loose and traveling in the system.I have a few issues with this #1 why after four years of running fine is this a problem now? #2 why am I not having issues when the core is shut off with the valves.I am leaning towards what John said about the faulty cores,but at $1100.00 a pop and warranty not covering them I can't keep on putting them in.I think I'm going to maguiver an automotive core in and see what happens.Thanks guys for all your comments and keep them coming.
rachel-stroup
May 26th, 2013 11:34am
I have drilled over holes in crown gears with a masonary drill bit but you have to grind it to a thirty degree angle more like a regular drill bit and re-sharpen it often during use.Oh and you will need a carbide or diamond grinding wheel to sharpen it.Good luck.



Thanks !!!



Rachel !!!

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