Hi everyone, thanks in advance for your help with this.
My friend's 2006 V6 is leaking from this black plastic thing that is located directly beneath the throttle body. Is this the thermostat housing? I'm really not used to a thermostat housing looking anything like this thing. There seems to be two pieces to it (a top and a bottom) and there are a few hoses of varying sizes running to it from the radiator, to the block, etc... It is leaking coolant like crazy out of the driver's side. There was some grayish goo the seemed to have melted out of it also. Is there a gasket in there between the top and bottom that could have failed? Or should I just take it apart and rtv or silicon the two pieces back together? This seemed to have happened out of nowhere. There doesn't seem to be any coolant in the oil or any other leaks.
I tried searching the forums but I really couldn't find anything specific. I am going to buy the haynes/chiltons manual, but I already know there is a good chance that they aren't going to be much help with this. An internet search yielded some odd results as to whether there is a gasket in there or not.
Hi everyone, thanks in advance for your help with this.
My friend's 2006 V6 is leaking from this black plastic thing that is located directly beneath the throttle body. Is this the thermostat housing? I'm really not used to a thermostat housing looking anything like this thing. There seems to be two pieces to it (a top and a bottom) and there are a few hoses of varying sizes running to it from the radiator, to the block, etc... It is leaking coolant like crazy out of the driver's side. There was some grayish goo the seemed to have melted out of it also. Is there a gasket in there between the top and bottom that could have failed? Or should I just take it apart and rtv or silicon the two pieces back together? This seemed to have happened out of nowhere. There doesn't seem to be any coolant in the oil or any other leaks.
I tried searching the forums but I really couldn't find anything specific. I am going to buy the haynes/chiltons manual, but I already know there is a good chance that they aren't going to be much help with this. An internet search yielded some odd results as to whether there is a gasket in there or not.
Thanks again!
This is very common for the mustangs. My 2000 was leaking in the exact same place. it's cheap plastic. It's called the intake manifold, and someone may have tried to RTV it from the inside. Thats what that gray stuff might be. You will need to replace the intake manifold. Do not try to repair it.
Thanks for your replies.AJ- it definitely isn't the intake manifold, but thanks for your help.xchris- it is leaking at the seam between the top and bottom pieces of the housing on the drivers side. The whole seam is leaking on only that side. Since price isn't a problem I think I will just pick up the whole housing (top and bottom pieces) and replace them rather than screw around with trying to fix or seal something that has obviously failed. Did you have to get the housing from the dealership?
Im turbo'd so i had to do alittle more then you did, i did get the part from the dealership they also supplied the gasket (i think they gave me two but i only needed one) I wouldnt even call it a gasket, its like an oversized O-Ring
I put RTV sealant around the whole thing just incase (the high temp gasketmaker rtv)
I had to take off the throttle body and some other air inlet tube was in the way for me but i dunno if it would be on your car. Its very simple, i would pick up one of those chilton manuals though, i have one and although it misses out on alot of things i;ve needed its also come in handy as well
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2006 V6 Pony Package Premium -Mods: 61mm Powerhouse Turbo and Intercooler, Evolution Dyno Tune(Jon Lund), Steeda Performance Shorty Headers. Current Numbers: 350 rwhp/420 torque @ 8.3 psi (low boost)
415 rwhp/470 torque @12 psi Car died 6/23/09
New Set Up: 4.6 3v With Manual Trans, Bolt Ons
This is very common for the mustangs. My 2000 was leaking in the exact same place. it's cheap plastic. It's called the intake manifold, and someone may have tried to RTV it from the inside. Thats what that gray stuff might be. You will need to replace the intake manifold. Do not try to repair it.
S197 Mustangs do not have a cooled intake manifold like earlier Mustangs.
Awesome, thanks a lot, I definitely feel a lot better about tackling this now. The throttle body and intake hose are definitely in the way so ill just pop them off. Once I'm done I'll be sure to let you know how it went.
I changed it out, the housing had pretty much came apart on the driver's side. It is glued together plastic, so the gray goo that was on it must have been that glue.
I rounded off the back bolt that holds the housing to the block, so that was a major pain in the ass. I ended up pulling off the intake manifold so I could drill the bolt and got it out with an extractor bit.
When I first put the new thermostat housing in, I forgot to use the old o-ring (basically a black rubber band) so it leaked, that's when I rounded off that bolt.
When I installed the housing for the second time I used black high temp RTV at the block to make sure it wouldn't leak. I also used the RTV on the temperature sensor that goes into the top of the housing, because that was leaking as well. I probably should have just changed the o-ring out on the sensor, but I just wanted to get this done. (It was almost 100 degrees outside when I was doing all of this.)
So yeah, what a pain it was to change this part that really shouldn't have failed how it did.
2006 Mustang V6-Nasty coolant leak. 
