I’m trying to figure out where this leak is coming from which is on the engine block, located underneath the intake manifold. I’ve done the Billman’s coolant method bleed countless times, and air vents are still blowing semi hot air not hot enough, and bleeder valve is not hissing out any air. Also done the filling up the funnel till air burps out, and no bubbles coming up and idling for minutes at a time. I might try opening the engine block plug to see if any trapped air is there. As for the leaking issue is this more of air still trapped inside or can be a faulty line leaking out? As I only see the puddle of coolant in that engine block space. The coolant puddle should be where that paper towel is at.

 

Looks like you may have some aftermarket plumbing. Can you take a wider angle photo, to show more of your engine compartment?

Thanks!

 

Is it near the small hoses that run under the throttle body and idle air control valve ? The hoes can get loose as do the small clamps they use to connect to the throttle body and idle air valve stems, and they can drip small droplets of coolant over time. If it is that then new hoses or tighter clamps will usually solve the issue.

 

Get a mirror in there for a better viz

 

Check that dam freeze plug on head. Its in that area. Tends to leka small until it blows out

 

*LEAK

 

You're using aftermarket hoses.

Are you using worm clamps?

Those are two potential areas of leaking.

When did the leak start?

 

I recently had a leak under my intake manifold (cylinder 4 ? - nearest to firewall). It turned out to be my hondata intake manifold gasket that cracked and started to fall apart. The coolant would drip under the manifold and puddle up and drip down the tranny and ground.

I used a coolant pressure tester along with a mirror extension tool that could fit under the manifold.

 

At first thought it was leaking from the lower radiator hose, since the puddle was right next to it. Thought the issue had something to do with the thermostat not opening, and coolant had nowhere to go but to leak out. Also the lower hose was cold compared to the top. So I changed the thermostat with a Spoon since fan switch is also Spoon, as both can work in unison of engaging the fans at a lower temp. Drained and re-bled the coolant, lower hose still cold, and fans not turning on. Tested the voltage of the radiators harness connectors, top was fine, but bottom connector to the fan switch was giving no feedback, so turned out was a dead connector. Replaced plug connector via cycleterminal.com, and now fans turning on at the correct temp of around 190F. Thought this fixed the leaking issue, but just to verify, I pressure tested the radiator, and turned out the leak was coming from the top radiator hose. Clamps came with the hoses which are the screw on type, and wasn't screwed on tightly. Installing those hoses were a bitch to put on, so I may have has assed the last part of screwing in the clamps onto the hoses firmly. The entire time thought it was 1 single issue coming from the lower radiator hose, turned out to be 2 separate issues. Now everything's good, heater blowing hot air, fans turn on at the appropriate temperature, and no leaks.