[Cutting-Edge Diesel]

buddy of mine with 225s and a s300 66/74 has had problems with his truck puking at WOT. It only does it when its pulling hard and doesnt eat any coolant. I didnt think it sounded like blown gaskets because its not puking or eating any under normal driving. think it could be a cracked head or something besides the heads?

 

[Snake]

What's the pressure in the degas bottle / coolant system?

EOT vs ECT?

Is there diesel in the degas bottle? If not, you can most likely rule out a cracked head.

 

[Cutting-Edge Diesel]

he has a live wire so he cant monitor EOT right now. and he didnt notice any fuel in the coolant but he did find oil in it when he replaced the oil cooler recently. and hasnt pressure tested the coolant system yet

 

[redracer62]

mine did it only on wot. egr deleted as well. it was the gaskets.

 

[offroadinginaz]

he has a live wire so he cant monitor EOT right now. and he didnt notice any fuel in the coolant but he did find oil in it when he replaced the oil cooler recently. and hasnt pressure tested the coolant system yet

IIRC there is a update for the Livewire to monitor EOT.

I put my .000002 on HGs. Heads weren't machined correctly

 

[Cutting-Edge Diesel]

he just hasnt updated yet.

think its just a small leak that only leaks when the cylinder pressures get high?

 

[redracer62]

maybe. i drove mine for a year like that and didnt get any worse. just puked on wot.

 

[Cutting-Edge Diesel]

how did you coolant look?

 

[Silverback]

Its HG's

 

[stroke of luck]

Could be the cap too. I know Ford has a replacement that is supposed to prevent venting (if its not hg)

 

[06f250powerstroke]

just had the same problem it was gaskets

 

[jwarren]

It's the HG's. He can try to get a tune with less timing, that will fix it. I would pull the valve covers and check the tq on the studs. Crank them to 250lbs. Make sure peak timing never goes over 8*

don't let it puke or it will get worse, untill you get a new tune or re torque the heads don't run it at wot.

 

[STRAIGHTSTROKEN04]

I have a similar problem could it be there is to much coolant in the reservoir ? It sits even or a little under the min line. I had arps and gaskets put in about three months ago. Ect and eot stay within 15. I wouldn't think I hope its not gaskets already.

 

[donzimama]

It's the HG's. He can try to get a tune with less timing, that will fix it. I would pull the valve covers and check the tq on the studs. Crank them to 250lbs. Make sure peak timing never goes over 8*

don't let it puke or it will get worse, untill you get a new tune or re torque the heads don't run it at wot.

:whs:

 

[RocknRoll]

Yes its possible you have too much. The truck will puke out any extra, thats why they figured out the new levels, it was being overfilled. Mine will puke out exactly what it doesn't need due to the fluctuation in coolant under use. If i put in a hair too much, it will puke it out under wot. But thats just my truck, maybe different for yours.

 

[STRAIGHTSTROKEN04]

Yea every trucks different. But mine has done it a few times, but its never a lot of coolant just a little bit. But I guess ill pull some out this weekend and go from there.

 

[Cajunhunter67]

Sounds like a small HG leak. Only forcing air into the cooling system under high boost!!!