egr or head gasket?

[907_6.0]

my 2006 6.0 has spewed coolant out of the resrevoir several times now, though runs perfect otherwise it only does it when im in extreme street tune at max boost and it makes a tea kettle sound i put a tee on the coolant line that comes of the top of the reservoir and observed the pressures, under normal driving in stock tune the pressure rides at about 7 psi, on extreme street high boost im seeing 16 psi then the cap starts puking. so it runs perfect and i have no white smoke coming out of the tail pipe my my eot ect are always within 9 or less degrees of eachother so what do you guys think ead gasket or egr ? what other tests could i do to figure it out?

[dieselkane]

Head Gaskets... Sorry to say man

[907_6.0]

thats what im thinkin too im just clinging to a thread of hope that it might just be th egr lol

[MarkBart]

u can test for combustion gases in the reservoir, or watch coolant for a heat spike both of which usually indicate head gaskets.

*at least thats true for gas jobs

[gary2070]

You can go to BulletProof Diesel's website and they have a video to determine which is bad.

[907_6.0]

thanks for the replies guys i will check out the bullet proof videos, innovative diesel seems to think that my egr is blown so im gunna put an egr delete on and see if it fixes it if not then ill take it in and get the heads done ill give an update as to whether it was egr or heads
thanks again

[capcalvin]

Two simple things you can try if you havent already are lower the coolant to 1/2" below min. line and replace cap. If it still pukes, EGR cooler or HG's.

[907_6.0]

thanks for the input guys i took it to the dealership and i just heard back from them they said its the head gaskets but on the brightside its covered under warranty still and theyre gunna put arp's in for me.