Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Sign in to follow this  
Michael DeClercq

Sea Foam in FUEL quieted the lifters?

Recommended Posts

After work tonight i noticed a rough idle every 3 or so seconds so i said what the heck and added some sea foam to the fuel, truck instantly smoothed out when i started it and the lifters went silent? Kind of confused. I did get a full syn oil change today at local dealer but the lifters made the noise still all day. Ive added sea foam to the crank in the past on my ford f250 and once on the silverado, but figured id leave just plain dexos in there for now and see what happens. But adding it to the fuel makes no sense to me? Could anyone chime in? Ill give an update after i drive a few miles tomorrow. Thanks, Mike.

  • Like 1

Share this post


Link to post
Share on other sites

Ps its a 5.3 09 half ton with afm 105,000 87 octane fuel, last fuel additive added 2k miles ago, dont remember it doing the same magic but it wasnt sea foam either

Share this post


Link to post
Share on other sites

You sure it just wasn't the oil change, never heard using seafoam like that before. I add STP gas and fuel system additives, but it's advertised like that. What made you think to use seafoam?

Edited by The Zip

Share this post


Link to post
Share on other sites

Says you can add it to fuel as well on the can, smoothed out idle very well, gonna keep an ear out for that lifter tick

Share this post


Link to post
Share on other sites

If it is advertised you can do it, good deal if it works. I'll follow the thread

Share this post


Link to post
Share on other sites

So it may have been spark knock and not lifter noise that you were hearing.

  • Like 1

Share this post


Link to post
Share on other sites

So today after say 35 miles the noise is back, not as bad but the "lifter" noise has come back a bit, so has a bit of the rough idle, i know my gap is .045 and should be .040 but the old ones were .045 so thats what i did with the new ones, they came at .045 outa the box so i figured someone must know something other than .05

40 being the best. Ill keep updating as time goes on. Gonna fix the gap to .040 over the weekend and go from there. First part of the day though the truck was silent and hard to tell if it was even on when idling

Share this post


Link to post
Share on other sites

Well, I am not an expert or anything close, but I was told not to touch the tips of the Delco Iridium plugs as attempting to gap them would ruin them.

 

I just changed mine at 103,000 and to be honest I couldn't tell any difference, so those plugs are awesome.

Share this post


Link to post
Share on other sites

Well, I am not an expert or anything close, but I was told not to touch the tips of the Delco Iridium plugs as attempting to gap them would ruin them.

 

I just changed mine at 103,000 and to be honest I couldn't tell any difference, so those plugs are awesome.

You are correct on the iridium spark plugs. Most iridium spark plugs come with preset gaps and usually have some sort of protective sleeve or cardboard cone that cover the electrode end of the plug.

 

The plug packaging is usually marked as "do not gap". Trying to adjust the preset gap on an iridium plug may cause damage to the porcelain and the electrode, that will destroy the plug.

If you really need to adjust the gap, be very careful not to damage that small center electrode. Those tips are very sensation and easy to damage if you touch it.

 

 

 

Sent from my crappy iPhone 6

using Tapatalk

Edited by BlackZ71Silverado
  • Like 1

Share this post


Link to post
Share on other sites

Well im half way through the tank of gas, trucks still quiet, idle is pretty smooth sept if i lean my leg on the door panel

Share this post


Link to post
Share on other sites

Down to low fuel light so filling up only with no sea foam and 93 octane to see what that does, truck started to act like before the sea foam once i got down to a quarter tank so i don't know what to think of that. Lifters still pretty quiet but vibrations were all totally back. Will give an update after i burn through 94 octane tank of gas

Share this post


Link to post
Share on other sites

Still sounds like spark knock to me. Which would mean you may have carbon build up inside the combustion area. If I recall Seafoam does temporarily boosts the octane which would compensate for the spark knock. The same as you running higher octane fuel. However, this is temporary and until you get rid of the carbon build up your engine will not be happy on lower octane fuel. Hopefully the Seafoam has starting breaking that carbon up but will require additional treatments. I'm currently seeing similar symptoms and I'm trying fuel treatments to hopefully break some of that up without me having to pull the heads.

  • Like 1

Share this post


Link to post
Share on other sites

If Seafoam didn't work, try BG44K. It's supposed to be the best stuff out there and it's pretty potent so don't get it anywhere near the paint as it will strip it right off.

 

If you can't find it anywhere near you, the Techron stuff is supposed to be pretty good.

 

https://www.bgprod.com/catalog/gasoline-fuel-system/bg-44k-fuel-system-cleaner/

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Similar Content

    • By Brad Davies
      Hey guys,
      I got a 2015 Silverado 5.3l. 138,250km. started ticking sometime last winter. Would happen instantly at start up and last about 5 minutes then would fade away. Sounded like a lifter. Took it to the dealer they said they couldn't hear it. Sound went away so left it.
      Fast forward to this winter and as Soon as the weather started to cool down I noticed the ticking again.
      Took it back to the dealer said they couldn't hear it again. I went and picked up my truck right at closing, soon as I fired her up the sound was there but everyone was gone so no one to hear it. I took a video. Next day I called the dealer, sent the video. Took like a week to get back to me. In the meantime I had taken videos pretty much every time I started it.
      Long story short after a brief fight with them about them trying to say it's normal etc they agreed that it sounded like a noise coming from the valve train. Left my truck with them, they called me said they had to change all lifters. Went to pick up my truck and on start up the sound is still there.
      This was a month ago. Sent more videos and a previous video from before they did the work and they are saying they can't hear it again.
      Took it in in person they agreed that there's an issue again and they will look at it. Now they are saying it's possible bad injector noise but they can't figure out which one 🙄.
      In the meantime I took it to another dealership they changed the vacuum pump. After that the sound changed. Now it's no longer at start up but once the truck has reached operating temperature and is more of a dull sound. Took it back to that same dealer who did the vacuum pump and they said valve train noise and deffo not injectors. But they won't work on it because the other dealer already did. 
      They didn't change the VLOM or the cam. I had/have no check engine lights. Truck runs awesome. Sometimes rough idle.
      Any ideas what it could be?
       
    • By Clutch Bo
      I have a 5.3 with the 6L80 in it and was hoping to swap over to a 6.2 but i can’t find much online about what i will need to replace, anything would help. I know i’ll need a new ECM and possibly a new flex plate but besides that i’m not sure. Thanks in advance!
    • By socalcruiser
      I have a 2012 GMC Sierra with 5.3 Vortec. I had to replace one head due to damaged exhaust valve. Completed the work and truck is running but on reduced power. Code reader shows 3425-3441-3401-3449 which are the solenoid deactivation codes for the 4 AFM cylinders. I assume I have done something or missed something that is causing this to all 4 of these cylinders.  Any suggestions on what steps to take to resolve? Visual inspection of wiring and vacuum hoses has found nothing. Oil was change with Mobil 1 and new filter. Possoibly in limp mode but these are only codes showing.
    • By Thuggins
      2015 GMC Sierra 1500 SLE   31K miles. So I straight piped my exhaust and deleted the third cat now I get about 9 mpg literally went through half a tank in one day. Can anyone shoot me in the right direction as to why this is! My guess back pressure but I keep reading things that go back and forth about it. Long story short I just bought a new cat and borla atak full system to try and fix this issue. Running 93O 
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Forum Statistics

    215,663
    Total Topics
    2,311,858
    Total Posts
  • Member Statistics

    195,142
    Total Members
    8,960
    Most Online
    GeMAN
    Newest Member
    GeMAN
    Joined
  • Who's Online   37 Members, 1 Anonymous, 873 Guests (See full list)



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.