Pukes coolant bad when tuned but doesn't when stock. - Ford Powerstroke Diesel Forum
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Old 10-28-2010, 02:38 PM
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Pukes coolant bad when tuned but doesn't when stock.

I have a 2008 6.4 powerstroke job 1. It pukes coolant pretty bad when I get on it with the spartan 275 tune, I haven't noticed any loss of power, boost loss, or white smoke from exhuast. I put the stock tune without DPF and I can't get it to puke I tried doing everything I do on the 275 tune to get it to do it without success, what gives? Is the egr flash boiling the the coolant when the egr acts as a waste gate? I was told a head gasket will show bad even tuned stock. Also should I get the coolant flushed and put some ford coolant in it? I mixed the coolant with the prestone 50/50 green stuff and will this cause the problem? I read on here that it could cause cavitation and will cavitation cause puking? All suggestions would be appreciated. Thanks
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Old 10-28-2010, 08:34 PM
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You need to pressure test the cooling system for one. They also make a combustion gas leak tester, which checks for combustion gases in the cooling system. Oh yeah, the green coolant is incorrect for these engines, and can potentially cause problems as well.
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Last edited by dieselkane; 10-28-2010 at 08:38 PM. Reason: Added link
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Old 11-06-2010, 05:49 AM
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Ok I think I figured it out. The other coolant I was adding was the cause, I flushed the system and added the gold ****, 50/50 mix with distilled water and it all stopped. I was beating on it with the 310 tune with no problems. I guess the other coolant was causing cavitation problems and putting air bubbles in the coolant allowing it to flash. I notcied the coolant was aerated in the coolant bottle before I changed it. I guess the tunes were allowing the motor to spin up quickly and the other coolant was cavitating.
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Old 11-06-2010, 05:55 AM
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I'd still pressure check the system. I've had a couple friends run 250, 275 and 310 tunes and it only pukes on the 275. MattP had the issues you described and it ended up being head gaskets.
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