Jump to content

Scary sound cold start

willhodg@inbox.com
 Share

Recommended Posts

willhodg@inbox.com Enthusiast

[email protected]

Posted
Posted

Ok so I’ve noticed a strange knock sound coming from engine during cold starts not really cold temp but after the truck sits for awhile 3 or 4 hours. After start you have the high idle kick in for a bit then once the idle drops back to 500 rpm or so I can here an intermittent knock or series of knocks coming from lower in the engine.  You can also hear some sort of actuator ticking away that’s not what I’m talking about. If you drive the truck for a while and stop you can’t hear the sound anymore until the next cold start. 

the engine is a 5.3 with 3.500 kilometres on it 

aragrev7 Enthusiast

aragrev7

Posted
Posted

I have this exact same thing. Same mileage. AT4 5.3L. I couldn’t watch the video, won’t open, but it’s definitely the same as my issue.

 

Dealership told me it “may” be the fuel pump. In their words, the sound “could be” within tolerance, but GM is not willing to investigate unless it gets worse because chasing a sound could be very expensive and labour intensive. “You have a lot of warranty left, I wouldn’t worry about it yet.” Apparently there is some sort of bulletin that suggests the sound “could” be normal.

 

It’s loud and irregular, and more and more noticeable when as the weather gets colder.

 

 

 

Sent from my iPhone using Tapatalk Pro

 

Bob2C Enthusiast

Bob2C

Posted
Posted
Ok so I’ve noticed a strange knock sound coming from engine during cold starts not really cold temp but after the truck sits for awhile 3 or 4 hours. After start you have the high idle kick in for a bit then once the idle drops back to 500 rpm or so I can here an intermittent knock or series of knocks coming from lower in the engine.  You can also hear some sort of actuator ticking away that’s not what I’m talking about. If you drive the truck for a while and stop you can’t hear the sound anymore until the next cold start. 
the engine is a 5.3 with 3.500 kilometres on it 

Have the same thing on my 18 5.3. Been like that since day one. 30k miles later it’s not any worse. Goes away when warmed up. Normal GM clunking/knocking IMO


Sent from my iPhone using Tapatalk
aragrev7 Enthusiast

aragrev7

Posted
Posted

Have the same thing on my 18 5.3. Been like that since day one. 30k miles later it’s not any worse. Goes away when warmed up. Normal GM clunking/knocking IMO

 

 

Sent from my iPhone using Tapatalk

 

That’s a bit better to hear. Though for longevity of parts (I tend to keep my vehicles for 8-10 years) loud clunking tells me I’m going to have some significant wear/damage by that point, because let’s face it, loud clunking/ticking means parts contacting harder together.

 

My main worry was my in-law’s Ford had the same issue that they finally dealt with 3 weeks ago. Dealer ended up dropping him a new engine with only 4 weeks left on warranty.

98034b9eb27c837877c16719044315c0.jpg

 

 

Sent from my iPhone using Tapatalk Pro

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,972
    Total Members
    8,960
    Most Online
    Whit.the.COB
    Newest Member
    Whit.the.COB
    Joined

  • Who's Online   2 Members, 0 Anonymous, 938 Guests (See full list)

  • Latest Articles

  • Posts

    • Jsdirt
      What did you do to your "other" car (aka musclecar) today

      By Jsdirt · Posted

      Even tougher is the 5.0 / 302. That's what this one has.    https://postimg.cc/Z9XRrCSg   https://postimg.cc/4n3F3yzY   Just realized I had the airbox removed in the engine pic, lol.
    • MikeBMW
      Installing tow mirrors

      By MikeBMW · Posted

      Yep! This should be a pin somewhere as @pgamboa really dives into all of this. Thanks for reposting the link!
    • Grumpy Bear
      TCM Tuning 6L80E

      By Grumpy Bear · Posted

      I did the new thermostat after doing a 'flip' for a year. Runs as cool one way as the other in the summer but in the winter there is a bit of a floor. Yellow with the new 70 C thermostat. My data over the life of the unit to date. Still need more cooler. Anyway that floor helped both winter fuel economy and shift quality in the winter. I found it a good balance.       
    • Grumpy Bear
      Food & Drink

      By Grumpy Bear · Posted

      Evan Williams Bottled in Bond   So pouring the last of a bottle of Evan Williams Black label last night I set off the the state store for a refill only to be denied the by an empty shelf. Rats.    What the did have was a bottle of Evan Williams Bottled in Bond. 100 proof. Hum, a few bucks more but a known distiller. Lets have a swing at it. ( I have before )    Cracked it open and pour a serving over ice. Hum.... more heat, yes. More alcohol naturally. But the barreling not the proof brings the taste and this one came up short.    Oh is was familiar but the heat ran the barrel over like a Peterbilt runs over a squirrel. Could use a heavier toasting of the oak me thinks or perhaps a longer barreling. Who knows. But what I can say is ice or a water back isn't the answer. What kills one kills them both. Sad. It is a pleasant drink....if you have little to compare it to.  
    • Grumpy Bear
      Bridgestone vs Goodyear tires?

      By Grumpy Bear · Posted

      I've had exactly one set of Bridgestone. Lasted five year and 125,000 miles and had I known better 15oK would have been a cake walk. I would have bought a like set had they not tripled in price since the first set. I removed them at said mileage with 5/32" remaining in dead even wear all four. They were fuel efficient, quite, comfortable and predictable.    Early on I got a very good alignment checked at least once a year, sometimes twice; kept the tires properly inflated, balanced and rotated. And I've found that many a tire issue can be avoided with great maintenance practices. Lot's of tire dealers will do rotation and balance (simple) for free for as long as you own the tire they sold you so no excuse not to.    Bead prep, alloy integrity and stem health have a huge impact on inflation stability. There are more mountings done poorly that perfectly. Finding a good tire guy is gold and as important as finding a tire you like.    That 3X price increase now two sets of "other tires' later is starting look like a bargain.      Bad maintenance kills more tires than bad tires. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...