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Old 04-10-2013, 09:50 PM   #1 (permalink)
jrodgers
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6.5 losing antifreeze question

So my 2000 6.5 is losing antifreeze ( has been for a while ) so I would just add more and it would be fine. So now I am losing it and its starting to run hot when "gettin on it". I am also starting to smell it a little. Is there a known issue with this sort of thing or is there something I could check? Water pump, thermostat radiator cap?? Oh and no puddles or leaks I can see but it makes a gurgling sound from where I would think the heater core would be when driving. Also it has about 135,000 miles or so on it. Any ideas? Thanks
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Old 04-10-2013, 11:38 PM   #2 (permalink)
outalne94z71
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3 common things, head gasket, leaking heater core or cracked block(lower end crack common on 97-2001 6.5)

check cdr for sludge
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Old 04-10-2013, 11:42 PM   #3 (permalink)
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Do you smell coolant in the cab?
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Old 04-11-2013, 01:32 AM   #4 (permalink)
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My mitsu did the exact same thing and had a cracked head
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Old 04-11-2013, 06:05 AM   #5 (permalink)
jrodgers
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Quote:
Originally Posted by red_1995_k2500 View Post
Do you smell coolant in the cab?
Not really....seems to be coming from outside when the windows are open. Worst case scenario what am I looking at to fix it? Probably have to take it some where unless it the HC or WP.
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Old 04-11-2013, 07:28 AM   #6 (permalink)
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Most likely a head gasket has let go.
Have someone pressure test it with the glow plugs out to find the offending cylinder(s) and confirm but really should do both sides at the same time.

A cracked block can't be ruled out though as mentioned-give this thread a look over :
6.5 blowing coolant everywhere (Total Rebuild)
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Old 04-11-2013, 07:47 AM   #7 (permalink)
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Yeah, headgasket if you're lucky, cracked block somewhere if you're not. Bad news, unfortunately.

The gurgling sound means that engine compression is getting into your coolant system and it's being vented from the coolant reservoir bottle/cap. When this exact same thing happened to mine (the link that Racer55 quoted) I had hoped it was a headgasket, but when we tore the heads off we eventually discovered a crack in the #8 cylinder wall which condemned it.
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Old 04-11-2013, 08:00 AM   #8 (permalink)
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How is you upper hose (the one from T-stat housing to radiator) Is it inflating and getting hard once you start? even cold?
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Old 04-11-2013, 08:42 PM   #9 (permalink)
jrodgers
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Quote:
Originally Posted by racer55 View Post
Most likely a head gasket has let go.
Have someone pressure test it with the glow plugs out to find the offending cylinder(s) and confirm but really should do both sides at the same time.

A cracked block can't be ruled out though as mentioned-give this thread a look over :
6.5 blowing coolant everywhere (Total Rebuild)
Funny I went to the thread and said dammm 11 pages? Then saw the rest. What would something like this cost to repair? I really don't know how to work on diesels and how would I go about finding someone who I know will fix it right.
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Old 04-11-2013, 08:45 PM   #10 (permalink)
jrodgers
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Quote:
Originally Posted by matuva View Post
How is you upper hose (the one from T-stat housing to radiator) Is it inflating and getting hard once you start? even cold?
Going to check this tomorrow. Also today when I pulled in there was antifreeze leaking from under the passenger side about where your feet would be. ??? It wasn't really running hot though
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