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External
Since: Dec 16, 2005
Posts: 23
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(Msg. 1) Posted: Tue Aug 14, 2007 1:54 pm
Post subject: Engine Tapping Noise
Archived from groups: alt>autos>toyota (more info?)
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I have a 2001 Toyota Tacoma, V6, that was driven approximately 3 miles
without any oil in the engine. After reaching the truck I filled the
engine with oil, started it, and let it ran for a while. Since all
appeared to be fine, the truck was driven for approximately 30 miles.
After reaching the destination a slight noise was noticeable on the right
side of the engine. After letting the truck set for two hours, it was
driven, on the return trip, the same number of miles. While driving the
noise got a little louder. The truck set overnight, so when it was
started, the next morning, the noise developed into quite a loud tapping.
I thought the noise was coming from maybe worn lifters or camshaft lobes,
but there was no miss while the engine was running. After pulling the
value covers off, I measured the camshaft lobes and found that they were
all within tolerance and the lifters looked fine.
Please advise on what is the possible problem or problems. |
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External
Since: May 15, 2006
Posts: 1209
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(Msg. 2) Posted: Tue Aug 14, 2007 5:56 pm
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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"cea1" <cea1 DeleteThis @comcast.net> wrote in message
news:76547970f39eeb3fa4ea171deeeafe3f@localhost.talkaboutautos.com...
>I have a 2001 Toyota Tacoma, V6, that was driven approximately 3 miles
> without any oil in the engine.
Interesting. How did that happen? |
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External
Since: Aug 14, 2007
Posts: 95
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(Msg. 3) Posted: Tue Aug 14, 2007 5:56 pm
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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External
Since: Jan 03, 2005
Posts: 235
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(Msg. 4) Posted: Tue Aug 14, 2007 7:43 pm
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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Sounds like rod bearing knock. The rod bearings are usually the first to
go
when an engine is driven without any oil as they absorb a considerable
amount of load and force compared to the camshaft bearings. Drop the oil
pan, see if it looks like silver glitter in the oil. >> Stay informed about: Engine Tapping Noise |
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External
Since: Dec 16, 2005
Posts: 23
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(Msg. 5) Posted: Thu Aug 16, 2007 1:00 pm
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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External
Since: May 31, 2007
Posts: 306
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(Msg. 6) Posted: Thu Aug 16, 2007 6:26 pm
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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So you are completely without oil?
Where is the noise coming from? under the valve cover? or lower in the
engine? You may be able to get away with just a bearing job, or
actually a part of the typical "re-ring" job that also includes piston
ring set.
On Aug 16, 10:00 am, "cea1" <c....TakeThisOut@comcast.net> wrote:
> Okay, thanks for the advice! I'll drop the pan and give it a look. By the
> way, if the rod bearing is bad, doesn't that also mean that the crank will
> have to be serviced. >> Stay informed about: Engine Tapping Noise |
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External
Since: Jun 02, 2006
Posts: 4627
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(Msg. 7) Posted: Fri Aug 17, 2007 1:41 am
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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"cea1" <cea1.RemoveThis@comcast.net> wrote in message
news:662edb99c524e6c0e4babf6894f1d667@localhost.talkaboutautos.com...
> Okay, thanks for the advice! I'll drop the pan and give it a look. By the
> way, if the rod bearing is bad, doesn't that also mean that the crank will
> have to be serviced.
>
If the rod bearing is bad, then at the very least, the crankshaft will have
to be inspected.
--
Ray O
(correct punctuation to reply) >> Stay informed about: Engine Tapping Noise |
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External
Since: Dec 16, 2005
Posts: 23
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(Msg. 8) Posted: Fri Aug 17, 2007 8:35 am
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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External
Since: Dec 16, 2005
Posts: 23
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(Msg. 9) Posted: Fri Aug 17, 2007 8:51 am
Post subject: Re: Engine Tapping Noise [Login to view extended thread Info.]
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The noise appeared to be coming from the beneath the value covers, which
caused me to think that the lifters were tapping, but after removing the
covers the lifters, and camshaft lobes, looked to be in great condition. >> Stay informed about: Engine Tapping Noise |
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