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as many of you know
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ticking noises in the gm 5.3 seems to be
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a very common issue the four eight five
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three
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and six liter six two
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uh five three more prominent probably
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because it's most popular motor
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so what do i have now
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got a silverado
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with a ticking noise
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he says he has to let it sit
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in order to hear it so he drove it in
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here so i have it sitting now and it's
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cooling off because he says once it gets
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cool
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you'll hear it he goes and then after a
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few minutes it goes away
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he says he changes his oil regularly and
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uses the correct oil dexos 0-20
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but he still seems to have this issue he
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doesn't know why he says he's looked at
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himself he says he does most of his own
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work but he just can't figure it out
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so what could it be
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sits
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gets cold or cools off
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then it happens
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on a when he first starts it
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then it goes away
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so what's
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changing it's changing his temperature
Diagnosis: Lifters vs. Exhaust Leaks vs. Ignition Coils
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so it could be a couple things
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could it be lifters absolutely
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now
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the lifters themselves create the
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problem it's not the lifters themselves
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making the noise the noise that you
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actually hear when these things tick is
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excessive valve lash
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uh because the lifters go bad or wiped
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out a camshaft which is possible
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and
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then it starts tapping you actually hear
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excessive clearance between the rocker
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arm and a valve or the push rod and a
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rocker
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usually it's the other way around
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usually it's rockworm and valve
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but normally those type of ticks don't
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just go away
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a faulty lifter
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whereas the
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hydraulic portion inside is not staying
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pumped up
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usually that can do that where when it's
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cold it'll create that problem
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what's another thing that can create
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that problem
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exhaust leaks
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a lot of times exhaust leaks will
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straighten themselves out
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so i'm just waiting for this to cool off
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and once it gets cold enough then i'm
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gonna
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have somebody started or i might start
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it myself and i'm gonna check it for
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exhaust leaks i got a funny feeling
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that's what my problem is going to be
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as you saw in my other video
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with the tapping noise in that 5.3 that
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turned out to be an ignition coil
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whereas the wire had actually popped out
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why did i have no idea customer didn't
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know either it just happened so i got a
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funny feeling when it was assembled from
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the factory that thing was never
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installed correctly
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now that video was over a year ago and i
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still see that customer still driving it
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has not never had an issue again that
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problem never cropped back up
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this is the same design motor i did take
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a look just to see
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i don't see anything
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so
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let's let it cool off and we're going to
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find out what happens
Preparing for the Cold Start Test
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all right so i'm going out to that
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silverado
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it's been sitting for about three or
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three and a half hours
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and i got my little trusty step stool
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with me
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so the thing sits a little bit on the
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high side
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so i'm gonna start it up
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and hopefully it's gonna make the noise
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let me get my little step stool in
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position here
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make sure i get a good vantage point
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here
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yeah it looks pretty good got a pretty
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good gate vantage point
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all right let's see what she does
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first thing i'm going to do is put the
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key and roll the window down
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i like to be prepared
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if i could even reach in and do what i
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wanted to do
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no i can't
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think sits up too high
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my arms aren't that long
Capturing the Ticking Noise Live
4:19
that sounds like it's the other side
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so
Finding the Culprit: Broken Exhaust Manifold Bolt
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and there you go that's an exhaust link
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that noise see all the carbon there that
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back bolt
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is broken
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so
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that's a relatively common issue the
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problem is
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the bolts snap off in the head
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and i i believe what's happening is
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the expansion contraction the exhaust
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manifold is creating that problem
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and that's why they break
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shut that off
Final Verdict & Giving the Customer the Good News
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so
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there we go another ticking 5'3
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that's not the camshaft
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so just kind of weird i mean i had that
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one video where the ticking was the coil
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and um
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then this one and then i did have one
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with a bad cam and unfortunately i never
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made a video of it that's when i first
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started the channel and i just made it
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like a short and you can see in the
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short you can see the one rock arm not
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moving because it had a bad lifter
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uh but anyway
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so that's it i'm gonna call a customer
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give him the good news actually because
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that's not that's not terrible news but
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it's still it's gonna get kind of
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involved and if he decides he wants us
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to fix it that's great then i'll make a
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video of that and show you what's
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involved in fixing that
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so that's it for now i hope you got
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something out of that video if you do
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hit that like button if you could please
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subscribe tell your friends to subscribe
6:30
also
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all right that's it have a great day
6:33
keep wrenching