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09-27-2012, 07:02 PM
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Location: New Orleans, LA
1,809 posts, read 5,019,767 times
Reputation: 690
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Okay, so I had an new engine installed in my Suburban about 2 months ago, along with 2 Flowtech non-seremic headers.
The engine had over 74000 miles, it has over 76000 miles and the engine came from a 1992 Chevy kilveerado 3/4 Ton.home
Anyway, one day(a few weeks ago) I drove to Livingston, LA and back to New Orleans on the same day and when I came back home in the driveway I noticed a "ticking" or "clicking" sound, while the truck was at idle. I thought it was from the engine or headers.
So I let the truck cool off for a while and then came back and turned to thruck on and the sound was gone.k hUntil , about a few days ago when I went to Thibiduex, LA I jeard the sound again, and that same night when went back home to New Orleans I still heard the same sound while the truck was at Idle.
Could it be the headers or the engine?
Also, the sound comes from the bottom, andI checked on top of the engine and there's no sound from there.
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09-27-2012, 09:23 PM
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Location: East of Seattle since 1992, originally from SF Bay Area
40,512 posts, read 72,334,864 times
Reputation: 49830
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An exhaust leak will often be worse when hot. If it were lifters, it would come from the top and also be worst when you first start it up and they are dry. Noise from bottom end problems is usually more of a clank than a click. It's awfully hard to diagnose a noise on a forum, though.
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09-27-2012, 09:23 PM
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2,528 posts, read 2,625,942 times
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Exhaust "ticking" happens with the engine freshly shut off. Just go up to a "just parked" Harley and take a listen...you'll see.
If it's when it's running...it's either a belt/pully/idle pully....or the lifters are ticking. They may need lashed again. What's a lifter? See those arms on top of the valves and springs in the head? That's a lifter. Most any pushrod V8 will have them. Those are standard lifters. I cheated on my build and used Comp Cams Pro Magnum full roller rockers. Less friction and smoother movement gives gains of around 30 HP over stock. Google Image Result for http://www.hiperformer.com/images/products/engines_hp/gmc-305lb.jpg |
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09-27-2012, 09:27 PM
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2,528 posts, read 2,625,942 times
Reputation: 629
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This old stuff has been around for ages. It will hush up a ticking lifter/s usually. Just long enough to sell the car or unload it. If you plan to keep it...fix it right.
Marvel Mystery Oil 013 1 qt Mystery Oil |
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09-27-2012, 09:33 PM
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Location: New Orleans, LA
1,809 posts, read 5,019,767 times
Reputation: 690
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Quote:
Originally Posted by Hemlock140
An exhaust leak will often be worse when hot. If it were lifters, it would come from the top and also be worst when you first start it up and they are dry. Noise from bottom end problems is usually more of a clank than a click. It's awfully hard to diagnose a noise on a forum, though.
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The noise happens when after a few minutes when the engine is warmed up or hit. Not right after the engine is turned on. |
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09-27-2012, 09:33 PM
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2,528 posts, read 2,625,942 times
Reputation: 629
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Quote:
Originally Posted by Hemlock140
An exhaust leak will often be worse when hot. If it were lifters, it would come from the top and also be worst when you first start it up and they are dry. Noise from bottom end problems is usually more of a clank than a click. It's awfully hard to diagnose a noise on a forum, though.
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There is no mistaking the sound of a rod knockin'. It's loud and is very identifiable. |
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09-27-2012, 09:35 PM
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2,528 posts, read 2,625,942 times
Reputation: 629
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Quote:
Originally Posted by Blackandgold51
The noise happens when after a few minutes when the engine is warmed up or hit. Not right after the engine is turned on.
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Idler Pulley | AutoZone.com |
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09-27-2012, 09:39 PM
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2,528 posts, read 2,625,942 times
Reputation: 629
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Tick..Mississippi..tick..Mississppi.
Say that outloud to yourself as it ticks.
Is the timing about right? If so...it's a pully/belt issue most likely.
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09-27-2012, 09:46 PM
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Location: New Orleans, LA
1,809 posts, read 5,019,767 times
Reputation: 690
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Quote:
Originally Posted by Riverboat Gambler
Tick..Mississippi..tick..Mississppi.
Say that outloud to yourself as it ticks.
Is the timing about right? If so...it's a pully/belt issue most likely.
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Are you sure? Because the noise is coming from the bottom behind the engine around t.he end of the long-tube headers |
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09-27-2012, 09:50 PM
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Location: What use to be the South
441 posts, read 1,432,641 times
Reputation: 488
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Will the tic or rattle disappear when put into gear. It's not all that uncommon for the three torque converter bolts to loosen sometimes. I have also seen cracked flywheels tic. Does this vehicle have a heat riser valve on one of the manifolds. They can rattle too.
These are other things to look for that a novice would not think of and Marvel Mystery Oil will not fix.
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