Friday, June 15, 2007

Glad I'm off on Vacation

Next week I am off on Vacation. The wife and I both need some "Us" time to recharge the batteries. We've both been working our tails off the last few years, swapping our time for everything else in life so this will be a good chance to find out if we can still stand each other.

And the timing couldn't be better. I once said, "Some days your the Dog, some days the Hydrant."

Well, it is fitting this week. The above Chevy Silverado came in with a growling noise. No big deal, it's a common noise you hear when a Hub Assembly for the front wheel is starting to fail. At low speeds it was a growl and at highway speeds a pronounced hum. We slammed a new bearing in and the job went as easy as they should. Once we went on a test drive then the problems started. At low speeds we had no noise what so ever. It was very smooth going but once we hit anything above 40 mph a distinct whistle type noise would occur on acceleration. At first we though we could have shifted the backing plate for the brake rotor. Maybe pushed a pad out of position so we brought it back in and checked our work. Nope, everything looked good. We inspected the other side and where happy with it. Another test drive and we knew it was coming around the front but couldn't determine where. After a few more times on the hoist and a few more discussions about what we missed a light bulb went off in Dad's head.

"The damn ladder rack." He yelled as he jumped from his chair. We quickly pulled the ladder off and went for a drive and sure enough, not a peep out of the truck. It was quite as a mouse.

Once we got over our initial head slap and "DOH" Homer Simpson style we had a good chuckle over it. It was just something we never thought of to check until Dad recalled a incident years ago he had heard about where a ladder on a truck caused a shop to go threw days of testing and checking items. Thankfully we only wasted about 2 hours banging our heads trying to figure it out. What happens is the air moving past the ladder goes into and out of the small holes that are a part of the steps. Those holes act just like blowing over a coke bottle to make a whistle noise. At high speeds it can become audible.

Oh well, lesson relearned. One more tail from the shop to tell.


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