Help finding tapping noise. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

85burb · 02-03-2013, 03:16 AM

It is not a ls swap but it is a ls problem. It is a 4.8 in a 07 chevy. It sounds like it has a bad lifter. Like when the roller fails. Well any ways i pulled heads and came and lifters out and everything looks great. The only thing i seen is there is a interesting patteren of the base circle of the cam. Any ideas? Noise comes and goes. It can run a while without it and then it has it at start up and all the time later. Motor has over 272xxx on it. Has almost 40 psi oil pressure hot. I was for sure it was a lifter issue from the noise. I really need help on this. It is a shop truck and me and a guy that worked at chevy were sure it was a lifter. So i ordered all the stuff to do a cam and lifter job. Over a 1000 bucks. My boss is not mad but i feel like a idiot. Thanks!

tick - YouTube

**Clyde65** · 02-03-2013, 10:33 AM

I had a belt tensioner sound similar to that on my 4.8, I knew it wasn't the lifters when it started squeaking tho.
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**Clyde65** · 02-03-2013, 10:34 AM

Btw, for $1k you could have bought a take out and dropped it in.
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85burb · 02-03-2013, 10:40 AM

Yes I know we could have got a motor. But our general manager won't buy stuff on line. Hell we could have found a 5.3 for that. When I was looking fore the noise I put a pry bar on to head and exhaust manifold and I clearly heard the noise in cylinder 1 exhaust port area.
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Jon01 · 02-03-2013, 10:44 AM

Did you check pushrods for straightness?

85burb · 02-03-2013, 10:54 AM

Not yet. They all look fairly strait when I removed the
Will check today.
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Jon01 · 02-03-2013, 10:57 AM

I doubt any are bent unless it's really had it's neck wrung but it's an easy check while you're in there and will give noises like a lifter tapping.

whitels1 · 02-03-2013, 11:19 AM

It's normal for LS engines to sound like sewing machines, and that's what it sounds like. If you didn't see any excessive wear on the cam the crank should look similar. Maybe try a heavier weight oil.

Jon01 · 02-03-2013, 11:23 AM

They are noisy but that is excessive. Even with 200+k on it it should not be clattering like that.

85burb · 02-03-2013, 12:26 PM

This noise is not normal. Some ware there is something not working right. I have 2 in personal trucks and like 6 at work and they are all quite except this one.
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BR3W CITY · 02-03-2013, 03:30 PM

Ya thats not normal....even with dual springs and a high lift cam my valvetrain doesn't sound like that.

I'd also be interested in pushrod straightness....I know when you run a pushrod that is too long or too short in these...they sound like a Singer Machine, so I can believe that a bent pr could make the same. Did it change with rpm at all before you tore it down?

85burb · 02-03-2013, 03:33 PM

Push rods are all strait. Yes if I revved the motor up the tick got faster. It is a factory untouched motor.
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orngsikL · 02-03-2013, 03:36 PM

is it castech heads? head could be cracked. truck loosing coolant mysterously? any white smoke out the tail pipe at start up?

85burb · 02-03-2013, 03:37 PM

No major coolant loss that we know of. It is a quart or so low. No smoke
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orngsikL · 02-03-2013, 03:44 PM

did the underside of the valve covers look like butterscotch pudding?

orngsikL · 02-03-2013, 03:45 PM

got these marks on the heads?

orngsikL · 02-03-2013, 03:47 PM

http://ww2.justanswer.com/uploads/Bl...t_loss_5.3.pdf

Jon01 · 02-03-2013, 04:05 PM

It shouldn't have 706's being an 07 thus no Castech issue.

85burb · 02-03-2013, 06:31 PM

The inside of the valve covers look like golded brown normal color. They are 243 heads if i remember. They are for sure not 706 heads.

Jon01 · 02-03-2013, 06:58 PM

Should be 243's or 799's in 07.

85burb · 02-03-2013, 06:59 PM

For sure 243 then.
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coyotes33 · 04-05-2013, 11:39 PM

Did you ever figure out the issue? The 5.3 that I just put in my 84 sounds the same

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85burb · 04-05-2013, 11:50 PM

Yes and no. Yes the noise went away after the cam and lifter oil pump swap. No i never seen exactly what was causing it. I just figured it was a bad lifter. May thousand miles on that motor now and no more noise. Looks like you may be needing a cam swap soon.

coyotes33 · 04-06-2013, 12:22 AM

What do you think?

https://www.youtube.com/watch?v=7Xmh...e_gdata_player

85burb · 04-06-2013, 09:12 AM

They sound the same. Have you looked under your valve covers? When I put my burbs motor in a push rod jumped out. Maybe take your belt off too and run it. Do you have good oil pressure?
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02-03-2013, 10:33 AM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Help finding tapping noise. I had a belt tensioner sound similar to that on my 4.8, I knew it wasn't the lifters when it started squeaking tho. Posted via Mobile Device __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

02-03-2013, 10:34 AM	#3
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Help finding tapping noise. Btw, for $1k you could have bought a take out and dropped it in. Posted via Mobile Device __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

02-03-2013, 10:40 AM	#4
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. Yes I know we could have got a motor. But our general manager won't buy stuff on line. Hell we could have found a 5.3 for that. When I was looking fore the noise I put a pry bar on to head and exhaust manifold and I clearly heard the noise in cylinder 1 exhaust port area. Posted via Mobile Device __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

02-03-2013, 10:44 AM	#5
Jon01 Registered User Join Date: Nov 2012 Location: West Des Moines, Iowa Posts: 450	Re: Help finding tapping noise. Did you check pushrods for straightness?

02-03-2013, 10:54 AM	#6
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. Not yet. They all look fairly strait when I removed the Will check today. Posted via Mobile Device __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

02-03-2013, 10:57 AM	#7
Jon01 Registered User Join Date: Nov 2012 Location: West Des Moines, Iowa Posts: 450	Re: Help finding tapping noise. I doubt any are bent unless it's really had it's neck wrung but it's an easy check while you're in there and will give noises like a lifter tapping.

02-03-2013, 11:19 AM	#8
whitels1 Registered User Join Date: Apr 2012 Location: Vegas Posts: 617	Re: Help finding tapping noise. It's normal for LS engines to sound like sewing machines, and that's what it sounds like. If you didn't see any excessive wear on the cam the crank should look similar. Maybe try a heavier weight oil. __________________ GoldyLS1 K20 Build My K10 Rock Crawler -Dave

02-03-2013, 11:23 AM	#9
Jon01 Registered User Join Date: Nov 2012 Location: West Des Moines, Iowa Posts: 450	Re: Help finding tapping noise. They are noisy but that is excessive. Even with 200+k on it it should not be clattering like that.

02-03-2013, 12:26 PM	#10
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. This noise is not normal. Some ware there is something not working right. I have 2 in personal trucks and like 6 at work and they are all quite except this one. Posted via Mobile Device __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

02-03-2013, 03:30 PM	#11
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Help finding tapping noise. Ya thats not normal....even with dual springs and a high lift cam my valvetrain doesn't sound like that. I'd also be interested in pushrod straightness....I know when you run a pushrod that is too long or too short in these...they sound like a Singer Machine, so I can believe that a bent pr could make the same. Did it change with rpm at all before you tore it down? __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

02-03-2013, 03:33 PM	#12
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. Push rods are all strait. Yes if I revved the motor up the tick got faster. It is a factory untouched motor. Posted via Mobile Device __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

02-03-2013, 03:36 PM	#13
orngsikL Registered User Join Date: Oct 2011 Location: Watson, Louisiana Posts: 312	Re: Help finding tapping noise. is it castech heads? head could be cracked. truck loosing coolant mysterously? any white smoke out the tail pipe at start up? __________________ build thread - 1972 C/10 "Ethyl" 1974 C/10 " Paw Paw" C/10 Club Louisiana instagram - @esso_c10 @projectpawpaw

02-03-2013, 03:37 PM	#14
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. No major coolant loss that we know of. It is a quart or so low. No smoke Posted via Mobile Device __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

02-03-2013, 03:44 PM	#15
orngsikL Registered User Join Date: Oct 2011 Location: Watson, Louisiana Posts: 312	Re: Help finding tapping noise. did the underside of the valve covers look like butterscotch pudding? __________________ build thread - 1972 C/10 "Ethyl" 1974 C/10 " Paw Paw" C/10 Club Louisiana instagram - @esso_c10 @projectpawpaw

02-03-2013, 03:45 PM	#16
orngsikL Registered User Join Date: Oct 2011 Location: Watson, Louisiana Posts: 312	Re: Help finding tapping noise. got these marks on the heads? __________________ build thread - 1972 C/10 "Ethyl" 1974 C/10 " Paw Paw" C/10 Club Louisiana instagram - @esso_c10 @projectpawpaw



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02-03-2013, 03:47 PM	#17
orngsikL Registered User Join Date: Oct 2011 Location: Watson, Louisiana Posts: 312	Re: Help finding tapping noise. http://ww2.justanswer.com/uploads/Bl...t_loss_5.3.pdf __________________ build thread - 1972 C/10 "Ethyl" 1974 C/10 " Paw Paw" C/10 Club Louisiana instagram - @esso_c10 @projectpawpaw

02-03-2013, 04:05 PM	#18
Jon01 Registered User Join Date: Nov 2012 Location: West Des Moines, Iowa Posts: 450	Re: Help finding tapping noise. It shouldn't have 706's being an 07 thus no Castech issue.

02-03-2013, 06:31 PM	#19
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. The inside of the valve covers look like golded brown normal color. They are 243 heads if i remember. They are for sure not 706 heads. __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

02-03-2013, 06:58 PM	#20
Jon01 Registered User Join Date: Nov 2012 Location: West Des Moines, Iowa Posts: 450	Re: Help finding tapping noise. Should be 243's or 799's in 07.

02-03-2013, 06:59 PM	#21
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. For sure 243 then. Posted via Mobile Device __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

04-05-2013, 11:39 PM	#22
coyotes33 Registered User Join Date: Sep 2012 Location: San Antonio, Tx Posts: 65	Re: Help finding tapping noise. Did you ever figure out the issue? The 5.3 that I just put in my 84 sounds the same Posted via Mobile Device

04-05-2013, 11:50 PM	#23
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. Yes and no. Yes the noise went away after the cam and lifter oil pump swap. No i never seen exactly what was causing it. I just figured it was a bad lifter. May thousand miles on that motor now and no more noise. Looks like you may be needing a cam swap soon. __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

04-06-2013, 12:22 AM	#24
coyotes33 Registered User Join Date: Sep 2012 Location: San Antonio, Tx Posts: 65	Re: Help finding tapping noise. What do you think? https://www.youtube.com/watch?v=7Xmh...e_gdata_player

04-06-2013, 09:12 AM	#25
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: Help finding tapping noise. They sound the same. Have you looked under your valve covers? When I put my burbs motor in a push rod jumped out. Maybe take your belt off too and run it. Do you have good oil pressure? Posted via Mobile Device __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

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