05 silverado coolant leak

[tom70]

have a 05 silverado with 5.3 can smell coolant in engine bay but can't see anything leaking. any sugestions?


thanks

[5.0THIS]

The water pump gaskets are a known weak spot, but may only leak a small amount and might go unnoticed. Same thing with the water pump itself, take a look at the weep hole.

[Smittro]

Agree, coolant almost always leaves a trail usually a white color like trail after it dries.

Check around your rad cap and heater core lines also.

[Sweet Chops]

How many miles do you have on the truck. More than likely the water pump gasket. I had to replace my gaskets at 50,000. 04 5.3 Sierra.

[tom70]

has around 65,000 noticed white color at rear of water pump on passanger side. should i pressure system with a coolant pressure tester? if so do it hot or cold?

[tom70]

has around 65,000 i noticed a small white trail at rear of water pump on passanger side. should i pressure system ? if so hot or cold?

[WS6ADDICT]

These are notorious for leaking for a short time only when they cool down. Water pump gasket is the fix, replace pump if you are overzelous on preventive maintainence, but the gasket is the culprit.