Im asking this question because i was replacing my rear valve cover, I put everything back togather and then i drained my radiator/ filled with coolant, then i started the car back up and noticed coolant spraying from near the bottom of the throttle body area through some small port or hole, i did put the hose back on and tight, so i was wondering if this is some sort of air bleeder? 3.5 engine

 

No, it sounds like the TB coolant hose ripped on you. Just bypass it. It's useless and actually just contributes to heat soak of the intake.

Follow where the hoses run and get a longer, new piece to bypass. You can use a coupler if you want, but I like deleting failure points.

 

ok great didnt want to bother that hose from the start but it was in the way so guess ill have to dissasemble the intake again tomarrow/ bleed the system again.

 

No need to bleed. Those hoses are above the heads.

 

Why does coolant flow to the TB on these engines? To measure coolant temps so it can regulate air intake?

 

A lot of modern cars do this. It's to keep it from freezing up in extreme cold climates.

 

It is to heat the cold air so that the gasoline will vaporize better for better combustion.

The concept has been around for years. When cars had carburetors, the manufacturers routed exhaust gas through the base of the carburetor. They used small passages that would plug up and we had to remove the carburetor and intake manifold to clean them out.

 

this is where the coolant is coming from

 

Impressive, I've never seen stuff rusted up that high LOL.

 

i dont know well its a good way to drain the coolant lol been wanting to drain that rusty coolant for the longest just been putting it off for a while. So is that hole normal on the thottle body port area? or do i need to bring the hose up more to cover it, its weird because no coolant came out when i removed the hose yesterday, so trying to figure out why it leaking there now.

 

Just do the bypass. It's pretty mandatory since there's a hole in the elbow.

It sounds like you had a really lean mix of coolant. It's a good thing you live in a warm climate.

 

what do you mean by a lean mix lol? Its never leaked there before until now. So its no other way to fix it besides the bypass?

 

Are you going to weld it? LOL. It's a stupid design. It does nothing good for the car. Take out the airbox and you can easily see where the hoses are. It takes longer to type on here than it does to do it :P

It looks and sounds like you have mostly water in it, hence why the fluid is brown and the steel elbow is rusting.

 

oh wow didnt realize it was rusting, but I bought the car like that previous owner must not have changed antifreeze, but what all am i going to need for the bypass? and will it affect cold start/ operation? or would i end up needing to replace the throttle body in the long run? Thinking this may have something to do with my no heat at idle, but it was not leaking before i drained radiator and removed the hose smh.

 

Use a metal barbed coupler or get a new piece of hose to delete the two running to the TB. No, it doesn't affect anything.

You have air in the heater core that needs bled.

 

thanks for that info man got my work cut out lol


I ended up stopping the leak, had to remove the intake once again, pull the hose up farther and put a new clamp on it, didnt realize how much coolant had leaked out, because the radiator was almost dry, but its fixed, also installed a new knock sensor while i had everything apart.