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CATEGORY LISTINGS > CATERPILLAR > valve tapping [ REFRESH ]
Thread Title:

valve tapping


Created On Thursday June 29, 2017 08:48 Diesel Talk
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stonefly
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Joined: Feb 2008

Note Thursday June 29, 2017 08:48 View thread in raw text format
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3406b

If it turns out to be a cam lobe, requiring the replacement of the cam, what is involved with removing the cam on this engine?
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westcoast
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Note Friday October 27, 2017 06:09 View users profile View thread in raw text format
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Bonnet off radiator out regards david

-------------------------
 detroit
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stonefly
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Note Thursday September 27, 2018 06:40 View thread in raw text format
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The tapping stopped on its own, not likely for a valve, correct? It stopped for a few months - no noise at all. Before it stopped, I checked the engine with a stethoscope. I pinned the noise down to number 3, inside the valve cover.

Recently the noise started again, but this time it was more of a clatter. It was intermittent. The engine started running rough at times, especially at idle. It would be idling smooth and then suddenly pick up a miss. Then the miss would disappear.

This leads me to believe that the problem must be an injector nozzle. Now I notice that when I run it with the pedal to the floor, I get a continuous trail of heavy dark gray smoke from the exhaust, even when the clattering sound has subsided to zero. That is new. Ordinarily the smoke was only mildly apparent on continued hard pull.

I think now that this must be a faulty injector nozzle. I am very cautious about bringing this truck into Caterpillar. I have heard horror stories about how seemingly minor problems can turn into million dollar repair bills. I ain't rich.

A bum injector could behave intermittently, couldn't it, clattering and then quieting down, and then suddenly clattering again? A malfunctioning injector could cause a lot of smoke on hard pull, correct? Even if it's not missing at the time?
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CATEGORY LISTINGS > CATERPILLAR [ REFRESH ]
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