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2000 Firebirl Water Leak


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cmontyrun
New User

Mar 4, 2012, 4:58 PM

Post #1 of 3 (1375 views)
post icon 2000 Firebirl Water Leak Sign In

A bit about me: I am mechanically inclined but never took an auto class in school so, I don't really know how to fix my car until after it breaks and I'm forced to learn.

I have a 2000 v6 Pontiac Firbird with a 3.8L engine and about 120,000 miles. I have had a leak in the coolant system for awhile that I can't locate.
The water collects on the front of the engine but only when the engine is hot and running. It splashes on the fanbelt which sends water everywhere, making it hard to spot where it originated.

When I first found the leak, I thought it was coming from the weep hole in the water pump so I replaced it. The car still leaked

I've found build up where the lower radiator hose connects to the engine but that also happens to be where fluid collects when pored from above that point.

I've tried idling the engine and waiting for a leak with no result.
I borrowed a pressure tester from my local auto parts place, used it as specified and revealed no leak.
I used UV dye and discovered that when placed on a hot engine, the dye burns away and doesn't glow.

I REALLY wanted this to be as cheep as possible so I tried replacing the stock hose clamps on the lower radiator hose. The next day there was no spot in my garage. Then it came back.

The last few days, the leak has gotten worse. Now, there's a leak when idling but I cant see from where. The orientation of the hoses make's it hard to see if the water is coming from the back of the hoses or behind the hose on the engine itself.

I was already planning to replace the hoses (as soon as they have them in stock) but now I'm wondering if I should cut my losses and take it to a pro to check the engine block.

I think my real question is "Is the problem my hose(s)?" what are the odds the water's leaking from the engine block?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 4, 2012, 5:46 PM

Post #2 of 3 (1342 views)
Re: 2000 Firebirl Water Leak Sign In

You need to go back to the pressure tester. If you are seeing liquid at all, then the leak should be found easy enough. Leave the pressure on asd long as it takes to find the leak.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



nickwarner
Veteran / Moderator
nickwarner profile image

Mar 4, 2012, 7:07 PM

Post #3 of 3 (1327 views)
Re: 2000 Firebirl Water Leak Sign In

Look closely at the intake gasket surface for leaks. The lower one especially. Pressure test as HT stated will help locate it.






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