Unused coolant passage above the oil cooler lines?

[G.T]

there's this square coolant passage on the side of the 5.4L GT500 block right above the two round channels that attach to the oil cooler & filter adapter

once the filter adapter is installed, it doesn't quite seal this passage, and doesn't leave enough room behind to bolt a blocking plate and/or anything else to make use of it..

the workshop manuals and part diagrams all show the same passage, but neither show anything attaching to it.

any ideas?

 

[05stroker]

If you are not using that coolant passage , then where are you running your lower rad. hose to ?

 

[G.T]

On the 07+ Shelby, the thermostat housing is a hub for 5 coolant lines..the lower rad hose is one of them

 

[G.T]

I also forgot to update my first post, but the passage in question is indeed unused on the shelby.. It has a freeze plug deep inside.

The passage is used on other cars with the 5.4L block where an elbow bolts up to it