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Mellowdien 04-24-2013 02:19 AM

Blowby in my 07 GT? Help!
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Hey Guys,

Last month my car suddenly overheated in traffic at night. I parked immediately called the tow truck and brought it to my mechanic. He checked everything and said it was a failure from my cooling fan that he fixed i drove her home again. The day after she overheated again. I purchased a new ford racing cooling fan.

Today i got a call from him saying that it had a blowby and that my heads and headgasket were damaged. Also that he doesn't know yet what the damage is to the pistons etc. The car only overheated twice!

My car only has 15400miles on her. My modifications are few. Beneath are some pictures.
There are no ford specialists or dealerships here.

Any opinions on what might have caused this and what the damage might be would be appreciated.

Mellowdien 04-24-2013 02:25 AM

Diabolical! 04-24-2013 07:45 AM

Are you running a catch can? Who wrote your tune and was it done after ALL mods?

Mellowdien 04-24-2013 09:27 AM

No catch-can. My tunes are all from Brenspeed.
I've had all of my modifications since 2010.

Diabolical! 04-24-2013 11:06 AM

A catch can will keep your plugs from ever getting that bad (as well as protect a lot of other parts). Was the tune done after ALL mods were complete?

Mellowdien 04-24-2013 11:33 AM

I will be sure to add an catch can during the repair process.

I've never driven the car without the appropriate tune. Everytime i added another mod, i had the new tune a week before the parts were installed so i could upload it as soon as they were on.

They were email tunes

danzcool 04-24-2013 12:59 PM

Was the thermostat replaced? That the first thing I would look at in any overheating situation. I'd certainly get that replaced and try it out before replacing the head gaskets and heads.
Overheating can warp the heads if you just drive it rather than stop and deal with it once you notice it, so his diagnosis is within reason, but if he didn't do anything with the thermostat either time, then I would question his competence.

Mellowdien 04-24-2013 01:07 PM

He said the thermostat was fine the first time, we're replacing it either way just to be safe. He also said that the radiator needs to get some kind of service?

Where can i purchase stock cylinder heads?
I only come across upgrades. I think it's going to cost to much for me to send them back to the states to have them rebuilt. I want to keep the downtime minimum.

danzcool 04-24-2013 02:10 PM

Do you have any ford dealers where you are? The 3-valve cylinder heads for the mustang are also used in some f150 & explorer 4.6L and 5.4L engines.

Ford_Dude 04-24-2013 03:31 PM

I looked on

and well the cost is about the same as for the fordracing heads

BTW they don't make the high thread heads anymore so you'll also have to get coils and new plugs

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