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Power Strokes
7.3 Tech
7.3 puking coolant
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[QUOTE="Petro, post: 1224215, member: 751"] Alright Guys, I've run into a problem I just can't seem to figure out. Last spring I put together and installed a 99 7.3 in a customers truck. Heads were checked and planed, block was honed and new rings and bearings were installed. Motor was completely gone through and rebuilt. Truck ran good when they picked it up. Well 11 months down the road, I get a call saying " the truck is pushing out its coolant". I picked the truck up, brought it to my shop. 5 minutes after start up on a cold engine, the coolant will begin to just pour out of the cap. It seems to be under a good amount of pressure. I immediately though head gasket, but after doing a Block Test several times I've found there to be NO exhaust gas coming through the coolant reservoir so I'm not sure how it could be a head gasket. I replaced the thermostat twice and even tried running the truck without a thermostat just to confirm that wasn't the issue. The weird part is, after the truck reaches operating temp, the puking stops and the truck runs normal. You can run it as hard as it'll go and it doesn't get hot or puke, runs like a top. There is no coolant in the oil, or oil in the coolant. This problem also is inconsistent, some days it will puke, other days it won't. So does anyone have any idea where else I should look to find the problem? I'm getting ready to rebuild a whole new motor and drop it . [/QUOTE]
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