This topic contains 3 replies, has 2 voices, and was last updated by 
EricTheCarGuy 6 months, 1 week ago.
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Topic
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I have a leak on my 05 honda civic, I wanted to think it was the water pump but when I go to pour in the coolant, it leaks like a faucet from the back of the engine but when the car is running and has some throttle, it turns into a drip. Could it be the hose that in the back of this diagram that is near the water passage? (right next to the intake)
Where does that hose head to? I can’t quite get my car jacked up high enough the standard jack I have, so I might need to get a floor jack rented somewhere or put it on a hoist. Just was curious where that hose goes and if that could be my culprit.
Thanks ETCG!
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There is an ‘o’ ring on that pipe that could be leaking. Easiest way to find a coolant leak is with a pressure tester. These can often be borrowed from your local parts store. Also, they aren’t that expensive and handy to have around.
You might also find this info helpful. https://www.ericthecarguy.com/faq/finding-and-fixing-leaks/finding-and-fixing-leaks
I did figure out that is where it was leaking from, so I took the connecting pipe out and I ordered the o-ring Honda OEM replacement, part 91314-ph7-003.
However, when I slid the new o-ring onto the connecting pipe it is loose and seems slightly big. Will it tighten up when I push the connecting pipe back into the water pump housing? The way I got the pipe out was from the side, I didn’t want to remove the intake again, so I am just going to try to press it in. Thanks again for the answer previously and this will be my last question. I guess I can just try to slide it back in tonight and see if it stops leaking haha.
J
Be sure to clean the corrosion out of the bore before installing the new ‘o’ ring. Also, I use silicone paste on the ‘o’ ring before insertion to prevent it from being damaged when installing.
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