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Case Tractors Discussion Forum
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Case 1370 puking coolant

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chrisk1500

05-13-2007 18:34:32




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Hi Guys,

I have a Case 1370 (504 BDT) that is puking coolant when under load. I have tried replacing the head gaskets but that has not made any difference. It is only puking coolant out of the vent hose on the neck of the radiator - it is not burning the coolant (no white smoke). When I take the coolant cap off the tractor when it is warm the coolant is foamy (not mixed with oil - just lots of bubbling).

What are the possibilities? Cracked sleeve? Cracked head? Bad turbo (I can't remember if they are water cooled or oil cooled)? Bad rad cap?

Thanks for your help!

Chris

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Doc Larry

05-16-2007 05:20:18




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 Re: Case 1370 puking coolant in reply to chrisk1500, 05-13-2007 18:34:32  
Maybe you"ve already checked, but a bad radiator cap could give you the problems you"ve described.

Larry



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chrisk1500

05-14-2007 06:21:17




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 Re: Case 1370 puking coolant in reply to chrisk1500, 05-13-2007 18:34:32  
I am familiar with boost and pyro gauges (I have both in my truck). The turbo spools like it should on the tractor. If my EGTs were getting high, my ECTs would get high enough to get me out of the yellow zone on the engine temp gauge.

The tractor does not overheat at all. When working in the field the temp barely gets out of the yellow zone after a few hours of pulling. I have attached an overflow cannister to the side of the tractor with the hose from the neck of the rad running down to it. The tractor will puke about one litre of coolant every couple of hours (then I dump it back into the rad and keep going).

Is there an easy way to see which cylinder might be the problem before teardown? I am going to pull off the t-stat cover and run the engine while looking for bubbles - but that will only tell me that either the sleeves are cracked or the heads are cracked - how do I determine which one? Do I have to do a full teardown?

The tractor is a 1975 Case 1370 with 6600 hours.

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charles hess

05-14-2007 16:21:22




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 Re: Case 1370 puking coolant in reply to chrisk1500, 05-14-2007 06:21:17  
How full are you trying to keep your radiator? You may be just trying to keep it too full.As i remember they only will need about 2 in above tubes an in fact will blow excess out. However if you are getting bubbles an foam probably prevesely mentioned problems.Other person brought up some important things to consider as tractor is got some age an use. His statment reminded me about a 1370 i worked on this winter that had a lot of caked dirt in strata tubes an also steel reinforcement ring in plastic tube in front of strata tube was just laying there blocking air. As for which cylinder if 1 is bad strongly suggest you pull all .

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chrisk1500

05-14-2007 19:06:18




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 Re: Case 1370 puking coolant in reply to charles hess, 05-14-2007 16:21:22  
Thanks to both of you guys. I will buy a rebuild kit in July and get the engine overhauled (in chassis). Until then, it will get the rest of the seeding done. I am not terribly concerned about it at the moment since I am catching the coolant that is being purged, and there is no white smoke at all. The tractor is not running hot.



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robertq

05-16-2007 03:54:06




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 Re: Case 1370 puking coolant in reply to chrisk1500, 05-14-2007 19:06:18  
There is a chance the water pump could be sucking air past seals and making froth.Try rebuild there to rule that out first before major OH.On older case with out pressure caps that can occur.



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chrisk1500

05-17-2007 15:59:24




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 Re: Case 1370 puking coolant in reply to robertq, 05-16-2007 03:54:06  
So the general consensus is put on a new rad cap and see what happens?

I know that Bars Leak is a bandaid but I am thinking of using it as a diagnostic tool...if the Bars Leak stops the leaking it may make it easier to find the problem on teardown....has anyone used it with success in one of these diesels?



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chrisk1500

05-19-2007 19:46:38




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 Re: Case 1370 puking coolant in reply to chrisk1500, 05-17-2007 15:59:24  
New air filters (old ones were dated 1986) and a new 14 psi rad cap fixed the problem....

EGTs could have been skyrocketing with the dirty filters and a weak cap would have let the boiling coolant escape...

Thanks for the help guys!

Chris



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robertq

05-14-2007 04:25:21




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 Re: Case 1370 puking coolant in reply to chrisk1500, 05-13-2007 18:34:32  
I wonder if head temp is going critical under load,can you hear turbo singing?? if no charge air say totally plugged air filter or turbo not spinning your heads will boil coolant fast under load. A pyrometer and boost gauge solve all that but no one uses these anymore.May as said be small cracks in heads that open when expanded with heat under load.I do know that charge air purges out heat and keeps heads cooler by many hundreds of degrees,I watch it do that when a charge air hose ruptured and the pyro went way up to head ruin temp in a minite or so under load.

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charles hess

05-13-2007 19:40:43




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 Re: Case 1370 puking coolant in reply to chrisk1500, 05-13-2007 18:34:32  
Assuming radiator is clean an engine is not overheating-an since you already had heads off you will neeed to pull sleaves an check for cracks at top/cavitation pin holes on sleaves /correct height of sleve at top of block . if ok you will need to have heads checked for cracks by a good shop. Look closely for indications when you tear down. Dont know if your tractor has a water filter on it but if not cavitation is a good posibility. You have a big job ahead but better to find culprit than to guess an hope for best. Do a good job analizing as you tear down an you will find problem. Also turbo is not problem.

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