Small coolant leak

[QIKRNU]

Is there any reason not to add a can of Stop Leak?

[Zolli]

I seem to recall the copper flakes become problematic. I dunno. Where’s the leak? Or is it currently a mystery?

[QIKRNU]

A mystery!

[Zolli]

Personally, I’d just keep topping it off until it becomes more evident

[CrickiKaze]

Leak detector kit that comes with a light.

Radiator end caps?

[Rol-co]

Still have one too, its drippin at the bumper, motor guard is bone dry.

Radiator end caps? They are at passenger side? Bottom radiator tower is wet.

[sid33]

I would not use stop leak. It can mess up a lot of stuff. I've worked on quiet a few cars after stop leak was used, and the junk in the inside of the cooling system was nasty.

[QIKRNU]

Seems like it only leaks when the system is under pressure...

[sid33]

You can get a coolant system pressure tester (radiator pressure tester) and pressurize the system when the car is off to help you find the leak. They're about $50-$100 on amazon or at harbor freight.

[CrickiKaze]

You can get a coolant system pressure tester (radiator pressure tester) and pressurize the system when the car is off to help you find the leak. They're about $50-$100 on amazon or at harbor freight.

Rent it from an auto parts store.

[zebinheimer]

Pull out headlights and check corners of aux rads for leaks. Also much more visibility for coolant hoses behind headlights. Coolant bottle/ expansion tank is more than likely the culprit. Unscrew it with the hose attached and take a look at the bottom/rear portion, they usually have stress cracks that weep under pressure. Stop leak is a band-aid. Keep the search going and if all else fails get a pressure tester like the others said.

[Rol-co]

I can tell you its hard too find, even with a pressure tester (i have one), its leaking at the bumper but can't tell where its coming from. Sometimes you need too pull a lot of parts off.
Expansion tank is alway's a neat idea, a new one is not to expensive and look great at the motor compartment.

[SFO GTO]

If you have red/pink or the purple coolant g12 or g13 it should have uv dye in it. You can shine a uv flashlight around the engine bay and find the leak.


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[RPMtech147]

+1 on the aux radiators....leaky bastards.