Srusl31

Hey guys I have a knocking sound coming from the fan area I'm not sure if its the water pump or fan hitting the shroud or just something loose. As of now i haven't felt or seen anything loose. Any feedback is appreciated. Thanks

Oldguard 7

I clicked on the link and it says video is private. My fan blade was hitting the shroud last week. It noise was metallic and intermittent. In my case one of the bolts holding the shroud to the rad support was missing. May want to make the vid "public" so members can see it.

Srusl31

Thanks for response man! sorry video should be public now.

toobroketoretire

It sounds like the tip of one blade is hitting the underside of the shroud. When they hit they usually hit in the 1 to 2 o'clock position so take a good look at how close the blades are to the shroud in that 1 to 2 o'clock area. And its usually the front of the blade tip that is touching because of the shroud's radius. If you find it is touching you can easily trim the foreword tip of each blade an equal amount. I used an ordinary washer to scribe around to mark a nice radius on my fan blades and took care of my fan-hitting-shroud problem.

Srusl31

Thanks toobroketoretire I actually trimmed the blades and no luck.. still makes the noise.

tonak

Stethoscope or a looong screwdriver to the ear would probably make it pretty clear where the noise is coming from.

toobroketoretire

A 4 foot length of 5/8" garden hose works about 100 times better as the hose blocks out all other noises.

vette_jim

Water pump bearing possibly, mine sounded like rocks in there instead of a bearing . The shaft was still tight, no wobble.

'75

Take the belts off then try it, while they're off you might want to get rid of that flex fan, lots of horror stories about them flinging blades through the hood!

tonak

I should think he gets the idea