The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-13-2017, 09:27 PM   #1
Sweetc10
Registered User
 
Join Date: May 2016
Location: Houston texas
Posts: 51
4.8 ls ticking noise help

Hoping some of you guys can lead me in the right direction without tossing money. I have a 68 c10 that I just installed what I think is a 2005 4.8 , did the msd and carb set up. Had the oil pan pulled and checked by a shop rebuilt the heads and put a small cam in. My issue I'm having is once the motor warms up I get a ticking noise that revs with the rpms. I pulled the valve cover wiggled the rockers the ones with valves up all have little wiggle , the ones started pushing valves down no movement. Also started truck with valve cover off they all moving like supposed to. Could hear the tapping but couldn't really pin point which one was doing the tapping. Sorry for long post just trying to put as much info as I could. Thanks for any help
Sweetc10 is offline   Reply With Quote
Old 04-13-2017, 11:41 PM   #2
68c10airstream
Senior Member
 
68c10airstream's Avatar
 
Join Date: Mar 2013
Location: Marquette michigan
Posts: 825
Re: 4.8 ls ticking noise help

A friend had a similar tick in his 5.3 2001 suburban. As a past dealer mechanic i used a wooden stick to my ear to figure which valve cover to remove. It would only tick warm, so once warmed up, off came the valve cover and with a feeler gauge of say .020" go from one valve tip and to the next with it running and when you get the feeler gauge to go in between the valve and rocker tip and quiet the tick down, that's the lifter or valve with issue. In the case of my friend's 5.3 i installed 1 lifter and all was good. If your motor is varnished up a lot a trick i learned from the 70's with sticking piston rings from varnish in chevy chevettes is to add a quart of naptha on top of a full crankcase and run it for a day or two at slower speeds and drain it out. You can do it as many times as you wish.

One word of caution is keep an ear to the engine when you drive it with the "naptha" in the engine, as in a severe case of varnish letting loose it may plug up an oil filter.I'm not saying your engine is real dirty inside, just some info for anyone reading this.

I have at least 4 "naptha" stories, 3 of which i was involved in with great success!
68c10airstream is offline   Reply With Quote
Old 04-14-2017, 01:07 AM   #3
uxdesigner
Active Member
 
Join Date: Nov 2013
Location: Rocklin, CA
Posts: 188
Re: 4.8 ls ticking noise help

Seafoam = pale oil, naphtha, and isopropyl alcohol blend
uxdesigner is offline   Reply With Quote
Old 04-14-2017, 07:50 AM   #4
homemade87
Registered User
 
Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 998
Re: 4.8 ls ticking noise help

I see you put a cam in . If you did not take the time to check preload on the lifters with the correct push rods length its very possible you will get some noise . Not sure how bad yours is but most ls motor will have a little lifter noise with a cam swap . Mostly with the bigger lift . Dont know how small your lift is and may not be that significant on your engine .

Also most aftermarket cams have a different base circle and will require different push rods . I would check with your cam supplier and see what is required .



This may be one other clue ( when the engine warms up ) . Could be an exhaust manifold leak . Some will not leak until warmed up . Sounds like a lifter tick .

Just a couple thinks to think about .
homemade87 is online now   Reply With Quote
Old 04-14-2017, 09:50 AM   #5
Sweetc10
Registered User
 
Join Date: May 2016
Location: Houston texas
Posts: 51
Re: 4.8 ls ticking noise help

Quote:
Originally Posted by homemade87 View Post
I see you put a cam in . If you did not take the time to check preload on the lifters with the correct push rods length its very possible you will get some noise . Not sure how bad yours is but most ls motor will have a little lifter noise with a cam swap . Mostly with the bigger lift . Dont know how small your lift is and may not be that significant on your engine .

Also most aftermarket cams have a different base circle and will require different push rods . I would check with your cam supplier and see what is required .



This may be one other clue ( when the engine warms up ) . Could be an exhaust manifold leak . Some will not leak until warmed up . Sounds like a lifter tick .

Just a couple thinks to think about .
I had a speed shop install cam and new pushrods along with rebuild heads. I'm hoping it's a header leak. Going to pull them off tonight and see.
Sweetc10 is offline   Reply With Quote
Old 04-14-2017, 10:52 AM   #6
izzy_Britton
Registered User
 
izzy_Britton's Avatar
 
Join Date: Apr 2013
Location: Nor-Cal
Posts: 612
Re: 4.8 ls ticking noise help

So you did a cam and rebuilt heads but you didn't do lifters for some reason? It is a 100$ job with all the heads removed already... Is there a reason that you didn't do the lifters?

Did you mess with the lifters at all while it was apart? Maybe got one in sideways? Typically lifters make noise when cold, and go away when warm. But I have seen only once in my life, where a roller lifter got stuck sideways and was riding the cam like a good ole non roller lifter and chewed the ever loving crap oitta the cam. It made me noise when warm than cold and I initially thought it was a rod bearing.

Some of the 4.8/5.3s have a little piston skirt slap going on OR wrist pin noise. Not too commoni don't think. But I would set my sights oh lifter noise if you never replaced them.
__________________
WHO_DCTC - Wifes 05 Z-71 Build
Cream Puff - LS'd Square
Tripple Threat - 3 Wrecks for the price of one build thread
Project Delongdium - Step-Sons Plastic Clad 2003 Avalanche
izzy_Britton is offline   Reply With Quote
Old 04-14-2017, 12:30 PM   #7
Sweetc10
Registered User
 
Join Date: May 2016
Location: Houston texas
Posts: 51
Re: 4.8 ls ticking noise help

Quote:
Originally Posted by izzy_Britton View Post
So you did a cam and rebuilt heads but you didn't do lifters for some reason? It is a 100$ job with all the heads removed already... Is there a reason that you didn't do the lifters?

Did you mess with the lifters at all while it was apart? Maybe got one in sideways? Typically lifters make noise when cold, and go away when warm. But I have seen only once in my life, where a roller lifter got stuck sideways and was riding the cam like a good ole non roller lifter and chewed the ever loving crap oitta the cam. It made me noise when warm than cold and I initially thought it was a rod bearing.

Some of the 4.8/5.3s have a little piston skirt slap going on OR wrist pin noise. Not too commoni don't think. But I would set my sights oh lifter noise if you never replaced them.
Speed shop did cam and told me heads needing done. So done whatever they recommended doing. If the lifters where changed I'm not sure. I don't see anything on receipt saying they had caged them but I'm not sure.
Sweetc10 is offline   Reply With Quote
Old 04-14-2017, 01:50 PM   #8
72blu
Registered User
 
72blu's Avatar
 
Join Date: Oct 2015
Location: Toronto
Posts: 89
Re: 4.8 ls ticking noise help

Have you got good oil pressure?

There is an O-ring on the oil pickup tube that often goes bad on these engines. A bad O-ring will allow air into the oil system causing the oil to perforate. The perforated oil won't properly lubricate the lifters causing a ticking sound. This happened to me and once I replaced the O-ring my oil pressure came back up and the engine no longer ticked.
__________________
1978 SWB cheyenne A/C, power steering/brakes, 305, Tach, Gauges
1972 SWB Custom 10, gauges, cammed LQ9, M22

72blu is offline   Reply With Quote
Old 04-14-2017, 04:27 PM   #9
izzy_Britton
Registered User
 
izzy_Britton's Avatar
 
Join Date: Apr 2013
Location: Nor-Cal
Posts: 612
Re: 4.8 ls ticking noise help

Every ls engine I buy or obtain, engine or complete vehicle, the first thing I always do is head gaskets, exhaust manifold gaskets and lifters. 200$ of preventative maintenance. Quick and easy, takes 2 hours tops.

Crab you take a video with good quality sound, maybe you will get some better suggestions. Worth a shot.
__________________
WHO_DCTC - Wifes 05 Z-71 Build
Cream Puff - LS'd Square
Tripple Threat - 3 Wrecks for the price of one build thread
Project Delongdium - Step-Sons Plastic Clad 2003 Avalanche
izzy_Britton is offline   Reply With Quote
Old 04-14-2017, 07:45 PM   #10
Sweetc10
Registered User
 
Join Date: May 2016
Location: Houston texas
Posts: 51
Re: 4.8 ls ticking noise help

Quote:
Originally Posted by 72blu View Post
Have you got good oil pressure?

There is an O-ring on the oil pickup tube that often goes bad on these engines. A bad O-ring will allow air into the oil system causing the oil to perforate. The perforated oil won't properly lubricate the lifters causing a ticking sound. This happened to me and once I replaced the O-ring my oil pressure came back up and the engine no longer ticked.
Im using the stock 68 gauge and it shows around half way between low and high. I pulled the driver header and gasket still looked good. Drove it around neighborhood for few minutes it never got all the way to operating temperature but didn't tick yet. Ran our of time so will try again run it longer see what happens.
Sweetc10 is offline   Reply With Quote
Old 04-21-2017, 01:54 PM   #11
Jstock85
Registered User
 
Join Date: Jul 2016
Location: Brandon,MS
Posts: 453
Re: 4.8 ls ticking noise help

You ever get to the bottom of this? I'm curious to what the issue was.
Jstock85 is offline   Reply With Quote
Old 04-21-2017, 08:26 PM   #12
Sweetc10
Registered User
 
Join Date: May 2016
Location: Houston texas
Posts: 51
Re: 4.8 ls ticking noise help

No I haven't made it to the bottom yet. Got a oil pressure gauge it idles about 25 lbs cold haven't drove it yet to get hot and see what it does hopefully tomorrow.
Sweetc10 is offline   Reply With Quote
Old 04-21-2017, 11:15 PM   #13
Jstock85
Registered User
 
Join Date: Jul 2016
Location: Brandon,MS
Posts: 453
Re: 4.8 ls ticking noise help

Have you eliminated any exhaust leaks as a possibility
Jstock85 is offline   Reply With Quote
Old 04-23-2017, 03:11 AM   #14
truckdude239
Senior Member
 
truckdude239's Avatar
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 9,767
Re: 4.8 ls ticking noise help

25 psi at idle is little low all my 4.8s and 5.3s have always made arou d 40 at idme and bounced up to 65ish with gas
__________________
David fuller
Ase Certified Mechanic
Click here to help support our board!!


1971 Chevy c-10 under going a 4.8l LSx swap

Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305

2007 Honda Accord my daily 101kmiles
2002 Honda Accord 4 door With 275k(sisters car)
2003 Honda Accord 109k( brothers car)
2002 Sububran 5.3 225k
2000 Tahoe 5.3l 369k

General manager for Marco's Carwash & lube
truckdude239 is offline   Reply With Quote
Old 04-25-2017, 09:26 PM   #15
Sweetc10
Registered User
 
Join Date: May 2016
Location: Houston texas
Posts: 51
Re: 4.8 ls ticking noise help

Quote:
Originally Posted by truckdude239 View Post
25 psi at idle is little low all my 4.8s and 5.3s have always made arou d 40 at idme and bounced up to 65ish with gas
Im in process of changing the oil pump now. A pain in the a $$ job . Will let yall know if it fixed it or I effed it up more.
Sweetc10 is offline   Reply With Quote
Old 05-04-2017, 10:36 PM   #16
Sweetc10
Registered User
 
Join Date: May 2016
Location: Houston texas
Posts: 51
Re: 4.8 ls ticking noise help

Well I replaced the oil pump a royal pain in the rump job with the motor in truck. But so far seems to have fixed the tapping sound.
Sweetc10 is offline   Reply With Quote
Old 05-05-2017, 11:06 AM   #17
Jstock85
Registered User
 
Join Date: Jul 2016
Location: Brandon,MS
Posts: 453
Re: 4.8 ls ticking noise help

Glad you got it figured out! Even though it was a PIA I was happy to hear it was a quick fix and not an internal engine issue.
Jstock85 is offline   Reply With Quote
Old 10-06-2018, 07:28 AM   #18
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 934
Re: 4.8 ls ticking noise help

Just in case anyone finds this post trying to fix their own LS ticking noises it's almost always the oil pump O ring on the pickup tube. Super common. There are 2 different sizes of O ring and it depends on what style pickup you have. These O rings get hard and crack but most of the time the story goes..."I just did a cam swap..." since you have to pull the pump and remove the pickup to put the cam in, that's when it gets pinched, twisted, or nicked. The ticking starts 99 percent of the time at cylinder 7 and may or may not show low pressure on the gauge. More O ring info here...


https://www.lsxmag.com/news/identify...-your-ls-swap/

Good luck!
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 10-06-2018, 07:53 AM   #19
homemade87
Registered User
 
Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 998
Re: 4.8 ls ticking noise help

Quote:
Originally Posted by OKGMC4 View Post
Just in case anyone finds this post trying to fix their own LS ticking noises it's almost always the oil pump O ring on the pickup tube. Super common. There are 2 different sizes of O ring and it depends on what style pickup you have. These O rings get hard and crack but most of the time the story goes..."I just did a cam swap..." since you have to pull the pump and remove the pickup to put the cam in, that's when it gets pinched, twisted, or nicked. The ticking starts 99 percent of the time at cylinder 7 and may or may not show low pressure on the gauge. More O ring info here...


https://www.lsxmag.com/news/identify...-your-ls-swap/

Good luck!
This is correct about the o-ring being a problem . It can crack or be pinched and aerate the oil and cause the lifters to tick or if bad enough cause a knock at start up .

No need to remove the the pump for a basic cam swap on a ls engine if not having problems . But if replacing the pump or chain , best to take care and pay close attention the the o-ring when installing .

Last edited by homemade87; 10-06-2018 at 08:00 AM.
homemade87 is online now   Reply With Quote
Old 10-06-2018, 10:37 AM   #20
BR3W CITY
meowMEOWmeowMEOW
 
BR3W CITY's Avatar
 
Join Date: Sep 2009
Location: MKE WI
Posts: 7,010
Re: 4.8 ls ticking noise help

This probably isn't helpful, but its worth knowing on LSx engines; there is a lot of discussion about ticking, lots of ticking. The problem being that most of the folks are not all describing the same problem.

The "sewing machine" tic is the scary one. It loud, it doesn't go away with rpm, and sometimes it will get worse. This is the one you'll most often heard when there is a pushrod length issue, lack of oil, failing lifter. It looks like you had an oiling issue, which it sounds like you solved

But since we're talking ticking, lets mention the others.
Ticking that sounds wispy or breathy; this is one that most folks equate to an exhaust leak, and it usually is. Its also worth mentioning that if you switch from a cast manifold to a tubular header, you are losing material thickness and noise dampening. Pipes resonate. Some folks will switch to a tube header and swear they have an ongoing exhaust leak, when in fact the ticking noise they hear is the valve events being more audible.

Injector noise. This is one that usually throws people who are new to LS motors. The damn injectors are noisy...always. If you've tested injectors off the car, that clack they make during cycle ain't quite. This one won't change with RPM, and you tend to stop noticing it as part of the engine sound.

Valve Events. This one is worst on big cam cars, but can even be noticed on stock genIII-IV motors. The design of the valvetrain means reaaaaly high speed and force upon valve closing events. This is exacerbated by big cams on older cam cores (like my Tsunami for example). The cam events are violent, and that makes noise. FWIW, the genIII-IV motors make around 90db at idle in a test cell. GenV stuff and on, has significantly lowered the force on closing valve events to reduce wear on valvetrain components and reduce noise, for about 68db in the same conditions.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING

MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
BR3W CITY is offline   Reply With Quote
Old 10-08-2018, 07:27 AM   #21
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 934
Re: 4.8 ls ticking noise help

Quote:
Originally Posted by homemade87 View Post
This is correct about the o-ring being a problem . It can crack or be pinched and aerate the oil and cause the lifters to tick or if bad enough cause a knock at start up .

No need to remove the the pump for a basic cam swap on a ls engine if not having problems . But if replacing the pump or chain , best to take care and pay close attention the the o-ring when installing .
Sorry. On both of mine I put in a new timing set and went through the whole mess. You are right. Technically speaking no need to pull the pump for cam only.
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:59 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com