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Old 12-27-2016, 01:56 AM   #1
Skoolie
 
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Hi guys! I got a good one for ya.please help

Hi sunbear here with the 97 6bt 5.9 12 v mechanical blue bird/allison bus KALI MA . AFTER HAVING replaced the head I left oregon and she used 2 gallons of coolant two or three times and I ciuldnt find the leak. Now im in aanfran and only.moving her from spot to spot when I HAVE too ,ive noticed a little wet spot that evaporates before it can grow and then dries up all together. When the coolant light comes on I have been putting about 2 gallons of WATER in . It never goes beliw 38 here so im.not worried about freezing . I was driving back from christmas at a nice hotel by the airport and my temp gauge went all the way almost to the redline but cooled down almost immediately while the gauge was fluctuating more than usual she stayed.cool .THE REASON IM TRIPPIN.is because my engine warning light was flickering. Tomorrow im going to find the leak and put some real coolant in there but this light is making me lose sleep as I have no where to work on the bus.here in this god forsaken city but also diesel mechanics here are like 150 an hour
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Old 12-27-2016, 02:36 AM   #2
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Many large vehicles have coolant level sensors (usually on the plastic overflow tank); if it runs low on coolant in the tank, it can give you a engine warning light. A failed sensor or bad connection can sometimes do this too. Sometimes disconnecting the sensor will fool the computer into thinking it's full, other times it will make the computer think it's empty.

The coolant is getting out somewhere. I'd try to sort that first, then fill up the system. Most likely that will sort out the engine warning light. A system low on coolant often times will fluctuate in temperature during driving.
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Old 12-27-2016, 02:56 AM   #3
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Thats the thing usually the low coolant light comes on
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Old 12-27-2016, 05:52 AM   #4
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If it started after the head replacement,, that's where I would look,, bad head gasket seal or not getting the head
tightened down correctly ,,,
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Old 12-27-2016, 07:00 AM   #5
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Originally Posted by madapple View Post
If it started after the head replacement,, that's where I would look,, bad head gasket seal or not getting the head
tightened down correctly ,,,
yep, if its not running out somewhere when its hot, its running inside. good luck
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Old 12-27-2016, 08:04 AM   #6
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if it is leaking out, look under the bus behind the engine.
Should be a large area of "water wet" vs oil wet.

If it is leaking internally, your oil will be full and looking like coffee with cream.
Or you will be belching large volumes of steam and water out of the tail pipe.
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Old 12-27-2016, 01:48 PM   #7
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When we changed the head and gasket we pressurized the cooling system and had no leaks looking up the oil pan.
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Old 12-27-2016, 04:36 PM   #8
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When we changed the head and gasket we pressurized the cooling system and had no leaks looking up the oil pan.
You wouldn't be able to see inside the cylinder or combustion chamber. Besides that, you won't be checking with the 2000 psi of cylinder pressure it would have running.
I would start with retorquing the head. Easy enough+don't cost nothin'.
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Old 12-27-2016, 04:41 PM   #9
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Well I found the leak!

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Old 12-27-2016, 04:42 PM   #10
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Well I found the leak!

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And what was/is the cause?
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