Bad HeadGasket?

[Honda250R]

where would i look for a coolant leak if i have a blown HG

[ZeroOne]

Overflow from the degas bottle on load. "Puking" as it's called around here.

[Honda250R]

i have that coolant residue under my hood from the degas bottle. could a failed egr valve cause that too or just HG

[webemj65]

now a injector cup could also pressurize the coolant system....? right? most likely a head gasket but you might want to pressurize the system and check the cups before you yank the head. just a thought!

[ZeroOne]

Originally Posted by Honda250R

i have that coolant residue under my hood from the degas bottle. could a failed egr valve cause that too or just HG

a failed egr could also overpressurize the coolant system, but... you should also see white smoke out the tailpipe as the engine burns the coolant that also leaks into the recirculated exhaust stream.

with a failed egr cooler, it is a 2 way street (exhaust gas, and coolant). under heavy load/boost, exhaust gas is forced from the cooler into the engine coolant... and when your under no-boost (coast) the now-highly-pressurized coolant is back-fed throught the same internal crack / failure, into the recirculated exhaust stream heading for the intake. egr valve cycles... engine runs rough and burns the coolant.

EDIT to add:
can't remember what you said in another thread... did you have a radiator failure? has the truck ever been run low on coolant?

[fordguy1715]

i took my truck to the dealer in sept for low coolant they pressure tested it couldn't find anything then in december and about 9k miles later i noticed coolant leaking from the drivers side of the truck so i had a the radiator replaced. i'm still losing coolant and have noticed white smoke blowing 2 or 3 times in the 2 years i've owned the truck. I've never noticed any puking of coolant does this mean i have an egr cooler issue not headgaskets? and could this have been the problem the first time i took my truck in b/c i was under the 36k mile warrenty the first time i took it in so if this is still the issue hopefully i wouldn't have to pay for the repairs...

[fordguy1715]

i'm kinda thinking it has something to do the egr valve or egr cooler because i think they checked the intercooler. any ideas???

[no-tel-in]

intercooler and egr valve... what do you think they have to do with each other?

[fordguy1715]

just trying to figure some things out about my truck so i can understand what the tech at my dealership is talking about when i take it in to find out what is wrong. if i knew how everything worked on my truck i would fix it myself and not have any questions.

[Honda250R]

i just got back from my dealer and they replaced three radiator hoses and my truck isnt any different. im going to keep an eye on my coolant to see if i loose any water. other than that my truck isnt running any better. no white smoke is coming from the tail pipe.... any more ideas to what could be wrong?