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What causes a ticking noise in the engine of a 2002 Trailblazer at idle?

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βˆ™ 2010-11-12 12:11:17

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my manafold is leaking on my trailblazer. I does cause a ticking noise.AnswerIf its a faint ticking noise its probably just the fuel injecters Answer2002 Trailblazers have piston sleeves that were a common problem. The piston slap can be a problem and some older engines had a recall due to the possibility for the sleeve to drop and hit the crankshaft.

The trailblazer has throttle body fuel injection. Not individual injectors.

I have a 2003 Trailblazer, and upon investigation, I come to learn that just before the infamous fan clutch goes out, it will start to make a ticking sound at idle. I thought it was a pulley or the belt, but within a month the fan clutch finally went. Locking up and sounding like my engine was revving too high as I drove. Repair cost vary, but make sure they use the upgraded fan clutch to avoid replacing it again in another 40,000 miles.

2010-11-12 12:11:17
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